9.Heat

09 Heat and Thermodynamics

You are in Antarctica. The temperature is around -40 degree Celsius. To verify the actual temperature you will use this kind of thermometer?

you-are-in-antarctica-the-temperature-is-around-40-degree-celsius-to-verify-the-actual-temperature-you-will-use-this-kind-of-thermometer
Match the following:The correct match is

match-the-following
An ice in iron pan is heated till stage of vaporization. Here is the chart that show correct change in temperature with time.

an-ice-in-iron-pan-is-heated-till-stage-of-vaporization-here-is-the-chart-that-show-correct-change-in-temperature-with-time
When a substance changes its physical state to another, it is called-change of state. When ice is heated it changes into water.This process of change is called:

when-a-substance-changes-its-physical-state-to-another-it-is-called-change-of-state-when-ice-is-heated-it-changes-into-water-this-process-of-change-is-called
How many degrees are between freezing and boiling point of water in Fahrenheit?

how-many-degrees-are-between-freezing-and-boiling-in-fahrenheit
Why small gaps are left between two successive rail pieces in railway line?

why-small-gaps-are-left-between-two-successive-rail-pieces-in-railway-line
Name the substance which expand on cooling

name-the-substance-which-expand-on-cooling
Which one of the following is the correct relation between degree Celsius and degree Fahrenheit

which-one-of-the-following-is-the-correct-relation-betweenoc-and-of
There is two glasses-one of glass and another of steel. Chilled cold drink is poured half-half in each glass. You will feal which glass more cold when touched?

there-is-two-glasses-one-of-glass-and-another-of-steel-chilled-cold-drink-is-poured-half-half-in-each-glass-you-will-feal-which-glass-more-cold-when-touched
Match the following

match-the-following
Conduction is process of transfer of heat in solids from one particle to another without actual movement of the particle. However, the only liquid in which conduction is possible is

conduction-is-process-of-transfer-of-heat-in-solids-from-one-particle-to-another-without-actual-movement-of-the-particle-however-the-only-liquid-in-which-conduction-is-possible-is
Why ventilators are made near to the roof?

why-ventilators-are-made-near-to-the-roof
The flow of cold air from sea to land during the day time is called:

the-flow-of-cold-air-from-sea-to-land-during-the-day-time-is-called
"When sun shines, the light passes through the atmosphere and warm the earth. The earth's surface send some of heat energy back into the atmosphere. When the amount of carbon dioxide increases in the atmosphere, it absorb much of heat and the heat comes back to earth causes increase in temperature" This is called:

when-sun-shines-the-light-passes-through-the-atmosphere-and-warm-the-earth-the-earth-s-surface-send-some-of-heat-energy-back-into-the-atmosphere-when-the-amount-of-carbon-dioxide-increases-in-the-atmosphere-it-absorb-much-of-heat-and-the-heat-comes-back-to-earth-causes-increase-in-temperature-this-is-called
Two steel glasses x and y have stuck inside of other. x is outer glass and y is inside stuck. What should be done to separate them?

two-steal-glasses-x-and-y-have-stucked-inside-of-other-x-is-outer-glass-and-y-is-inside-stucked-what-should-be-done-to-separate-them
It is hard to open the rubber lid of glass container in cold days; howerver when lid is heated it is easy to open, why?

it-is-hard-to-open-the-rubber-lid-of-glass-container-in-cold-days-howerver-when-lid-is-heated-it-is-easy-to-open-why
Electric wires sag in summer rather than winter, why?

electric-wires-sag-in-summer-rather-than-winter-why
Two thin blankets happens to give more heat than single thick blanket, it is because:

two-thin-blankets-happens-to-give-more-heat-than-single-thick-blanket-it-is-because
1 calorie is the amount of energy required to raise the temperature of 1 gm of water from------ to-------.

1-calorie-is-the-amount-of-energy-required-to-raise-the-temperature-of-1-gm-of-water-from-to
Burn injury caused by steam at 100 degree Celsius is much more severe than that caused by an equal amount of boiling water, why?

burn-injury-caused-by-steam-at-100oc-is-much-more-severe-than-that-caused-by-an-equal-amount-of-boiling-water-why
The quantity of heat required to raise the temperature of unit mass of substance by 1 degree Celsius is called specific heat. Which among the following has highest specific heat?

the-quantity-of-heat-required-to-raise-the-temperature-of-unit-mass-of-substance-by-1oc-is-called-specific-heat-which-among-the-following-has-highest-specific-heat
Calculate the amount of heat required to raise the temperature of an aluminium piece weighing 0.5 kg from 35 degree Celsius to 45 degree Celsius. Given that specific heat of lead is 900 J/kg degree Celsius.

calculate-the-amount-of-heat-required-to-raise-the-temperture-of-an-aluminium-piece-weighing-0-5-kg-from-35oc-to-45oc-given-that-specific-heat-of-lead-is-900-j-kgoc
During snow storm, the atmosphere gets

during-snow-storm-the-atmosphere-gets
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Question: The normal temperature of human body on the Kelvin scale is- ( IAS (pre) 1995 )

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Question: Transfer of heat by convection can take place in - ( MP PCS (pre) 2017 )

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Question: The temperature point at which solid, liquid and gaseous states may stay together is known as : ( 67th BPSC (pre) 2022 )

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Question: The hand burns more steam comparatively to boiling water, because - ( UP PCS (pre) 1993 )

question-the-hand-burns-more-steam-comparatively-to-boiling-water-because-up-pcs-pre-1993
Question: A liquid remains hot or cold for a long time in thermos flask because there is no loss or gain of heat by - ( UP PCS (pre) 2019 )

question-a-liquid-remains-hot-or-cold-for-a-long-time-in-thermos-flask-because-there-is-no-loss-or-gain-of-heat-by-up-pcs-pre-2019
Question: At what temperature are the reading of a Centigrade and Fahrenheit thermometer the same ? ( UP PCS (mains) 2015 , UP UDA/LDA (pre) 2003 , IAS (pre) 1993 )

question-at-what-temperature-are-the-reading-of-a-centigrade-and-fahrenheit-thermometer-the-same-up-pcs-mains-2015-up-uda-lda-pre-2003-ias-pre-1993
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Question: Normal temperature of human body on Celsius scale will be- ( 41st BPSC (pre) 1996 )

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Question: Which one of the following scales of temperature doe not have a negative value ? ( UP RO/ARO (pre) 2017 )

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Question: In cold countries, alcohol is preferred to mercury as a thermometric liquid because : ( UP PCS. (pre) 1997 )

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Question: Which one of the following is used as an antifreeze for the automobile engines ? ( UP PCS (Spl) (pre) 2008 ), UP UDA/LDA (mains) 2010 )

question-which-one-of-the-following-is-used-as-an-antifreeze-for-the-automobile-engines-up-pcs-spl-pre-2008-up-uda-lda-mains-2010
Question: Thermostat is related to : ( UP PCS (pre) 1993 )

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Question: When ice melts, then- ( UP PCS (pre) 2012 )

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Question: What is absolute zero temperature ? ( Jharkhand PCS (pre) 2`010 )

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Question: Thermostat is a device which : ( UP PCS (pre) 2007 )

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Question: What is the use of thermostat ? ( MP PCS (pre) 2005 )

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Question: Expansion during heating - ( UP PCS (pre) 2006 )

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Question: When a glass rod is placed in steam, its length increases but its width : ( UP PCS (pre) 1994 )

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Question: Assertion (A) : A piece of copper and a piece of glass are heated to the same temperature. When touched, thereafter, the copper piece appears hotter than the glass piece. Reason (R) : The density of copper is more than that of glass.

question-assertion-a-a-piece-of-copper-and-a-piece-of-glass-are-heated-to-the-same-temperature-when-touched-thereafter-the-copper-piece-appears-hotter-than-the-glass-piece-reason-r-the-density-of-copper-is-more-than-that-of-glass
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Question: What is the function of the thermostat of a refrigerator ? ( UP PCS (pre) 1996 )

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Question: When soggy biscuits are kept inside the fridge for sometime they become crisp because : ( UP PCS (pre) 2009 )

question-when-soggy-biscuits-are-kept-inside-the-fridge-for-sometime-they-become-crisp-because-up-pcs-pre-2009
Question: Thermostat................. is a mean of keeping stable ? ( Chhattisgarh PCS (pre) 2003 )

question-thermostat-is-a-mean-of-keeping-stable-chhattisgarh-pcs-pre-2003
Question: Assertion (A) : A piece of ice added to the drink, cools it. Reason (R) : Ice takes latent heat from the drink for melting resulting in the cooing of the drink. Select the correct answer using the codes given below :

question-assertion-a-a-piece-of-ice-added-to-the-drink-cools-it-reason-r-ice-takes-latent-heat-from-the-drink-for-melting-resulting-in-the-cooing-of-the-drink-select-the-correct-answer-using-the-codes-given-below
Question: Consider the following statements - Assertion (A) : If Ice collects in the freezer, the cooling in the refrigerator is affected adversely. Reason (R) : Ice is a poor conductor. Select the correct answer using the codes given below : (UP PCS (pre) 2010 )

question-consider-the-following-statements-assertion-a-if-ice-collects-in-the-freezer-the-cooling-in-the-refrigerator-is-affected-adversely-reason-r-ice-is-a-poor-conductor-select-the-correct-answer-using-the-codes-given-below
Question: In winter you touch a log of wood and a rod of iron, you will feel rod of iron is colder because- ( 41st BPSC. (pre) 1996 )

question-in-winter-you-touch-a-log-of-wood-and-a-rod-of-iron-you-will-feel-rod-of-iron-is-colder-because-41st-bpsc-pre-1996
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Question: Assertion (A) : Large cold storage plants use ammonia as refrigerant while domestic refrigerators use chlorofluorocarbons Reason (R) : Ammonia can be liquefied at ambient temperatures at low pressures. ( IAS (pre) 2000 )

question-assertion-a-large-cold-storage-plants-use-ammonia-as-refrigerant-while-domestic-refrigerators-use-chlorofluorocarbons-reason-r-ammonia-can-be-liquefied-at-ambient-temperatures-at-low-pressures-ias-pre-2000
Question: Consider the following statement : Assertion (A) : Light coloured clothes are preferred in summer. Reason (R) : Light colours are poor absorbers of heat. Select correct answer from the code given below : ( UP Ro/Aro (pre) 2016 )

question-consider-the-following-statement-assertion-a-light-coloured-clothes-are-preferred-in-summer-reason-r-light-colours-are-poor-absorbers-of-heat-select-correct-answer-from-the-code-given-below-up-ro-aro-pre-2016
Question: White clothes are cooler than black clothes because : ( UP Ro / Aro (mains) 2016 )

question-white-clothes-are-cooler-than-black-clothes-because-up-ro-aro-mains-2016
Question: To keep drinks at the same temperature for quite sometime, the walls of thermos bottle are coated with : ( RAS / RTS (pre) 1996 )

question-to-keep-drinks-at-the-same-temperature-for-quite-sometime-the-walls-of-thermos-bottle-are-coated-with-ras-rts-pre-1996
Question: Assertion and Reason are given below- ( Utt PCS (pre) 2012 )

question-assertion-and-reason-are-given-below-utt-pcs-pre-2012
Question: On adding common salt to water, the boiling point and freezing point of water will : ( UP PCS (mains) 2006 )

question-on-adding-common-salt-to-water-the-boiling-point-and-freezing-point-of-water-will-up-pcs-mains-2006
Question: An assertion and its reason is given below- Assertion (A) : Salt is used for cooking the food at places on higher from sea level. Reason (R) : Temperature is low in higher places. Which one among these is right answer ? ( Utt PCS (pre) 2012 )

question-an-assertion-and-its-reason-is-given-below-assertion-a-salt-is-used-for-cooking-the-food-at-places-on-higher-from-sea-level-reason-r-temperature-is-low-in-higher-places-which-one-among-these-is-right-answer-utt-pcs-pre-2012
Question: Which of the following statements is not true ? ( UP PCS (pre) 2007 )

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Question: If the temperature of air increases, how would it affect its ability to assume water vapour- ( Jharkhand PCS (pre) 2003 )

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Question: The cooling by a desert cooler is based on - ( RAS/RTS (pre) 2012 )

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Question: In the night of strong wind, dew is not formed because ( 40th BPSC (pre) 1995 )

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Question: Cooling is done by - ( 47th BPSC (pre) 2005 )

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Question: Which one of the following changes occurs when salt is added into the water ? ( RAS / RTS (pre) 2008 )

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Question: A fan produces feeling of comfort during hot weather, because- ( MP PCS (pre) 2008, 67th BPSC (pre) 2022 )

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Question: The most important function of perspiration is to : ( RAS/RTS (pre) 1994-95 )

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Question: In an earthen pitcher, the water remains cold due to the process of ( UP PCS (pre) 2012 )

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Question: Loss of water from the body through perspiration depends on : ( UP BEO (pre) 2019 )

question-loss-of-water-from-the-body-through-perspiration-depends-on-up-beo-pre-2019
Question: Which of the following staement iQuestion: Which of the following statement is not true : ( IAS (pre) 2002 ) Ans: Addition of solute to a solution increase its water potential.

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Question: In the season of summer, we experience a humid heat when weather : ( UP PCS (pre) 2003 )

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Question: The atmosphere exerts enormous pressure on us. but, we do not feel it because ( UP PCS (pre) 2010 )

question-the-atmosphere-exerts-enormous-pressure-on-us-but-we-do-not-feel-it-because-up-pcs-pre-2010
Question: Why does water boil at a temperature below 100 degree C at higher altitudes ? ( UP PCS (pre) 1994 )

question-why-does-water-boil-at-a-temperature-below-100-degree-c-at-higher-altitudes-up-pcs-pre-1994
Question: Assertion (A) : The boiling point of water decreases as the altitude increases. Reason (R) : The atmospheric pressure increase with altitude. ( IAS (pre) 2001 )

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Question: Xeric condition refers to - ( UP RO/ARO (pre) 2014 )

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Question: When a piece of ice floating in a glass of water melts, the level of water will : ( RAs / RTS (pre) 2007 )

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Question: In a pressure cooker, the temperature at which the food in cooked depends mainly upon which of the following ? 1. Area of the hole in the lid 2. Temperature of the flame 3. Weight of the lid Select the correct answer using the code given below: ( IAS (pre) 2021 )

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Question: Food gets cooked faster in a pressure cooker because- ( UP PCS (pre) 2007 )

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Question: Food gets cooked faster in a pressure cooker because : ( 67th BPSC (pre) 2022 )

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Question: In a pressure cooker food is cooked in shorter time because - ( UP PCS (pre) 2015 )

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Question: Pressure-cooker cooks food in lesser time because ( Utt PCS (pre) 2005 )

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Question: Assertion (A) : The handle of pressure cooker is made up of ebonite. Reason (R) : Ebonite is a hard material. ( Utt PCS (pre) 2012 )

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Question: Why does food cook faster in a pressure cooker ? ( UP Lower Sub (pre) 2002 )

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Question: A glass bottle containing water tightly corked breaks when it is kept in freezer, because - ( IAS (pre) 1994 )

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Question: When a bottle is filled with water and it is freezing the bottle breaks down, because- ( UP PCS (pre) 1995 )

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Question: Maximum temperature inside pressure cooker depends on : ( UP PCS (pre) 1995 )

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Question: Food is cooked faster in a pressure cooker because ( Utt Lower Sub. (pre) 2010 )

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Question: Assertion (A) : Woollen clothes keeps us warm. Reason (R) : Woollen fibres are made from a special type of protein, which is a bad conductor of heat. Select the correct answer from the codes given below : ( UP PCS (Pre) 2001 )

question-assertion-a-woollen-clothes-keeps-us-warm-reason-r-woollen-fibres-are-made-from-a-special-type-of-protein-which-is-a-bad-conductor-of-heat-select-the-correct-answer-from-the-codes-given-below-up-pcs-pre-2001
Question: If the doors of a refrigerator are left open for few hours, then the room temperature will : ( 67th BPSC (pre) 2022 )

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Question: Which one of the following statements is not correct ? ( IAS (pre) 2003 )

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Question: Consider the following statements ? 1. High clouds primarily reflect solar radiation and cool the surface of the Earth. 2. Low clouds have a high absorption of infrared radiation emanating from the Earth's surface and thus cause warming effect. Which of the statements given above is/are correct ? ( IAS (pre) 2022)

question-consider-the-following-statements-1-high-clouds-primarily-reflect-solar-radiation-and-cool-the-surface-of-the-earth-2-low-clouds-have-a-high-absorption-of-infrared-radiation-emanating-from-the-earth-s-surface-and-thus-cause-warming-effect-which-of-the-statements-given-above-is-are-correct-ias-pre-2022
Question: Opening the door of refrigerator kept in the room - ( 39th BPSC (pre) 1994 )

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Question : The cloudy nights are warmer than clear nights because- ( UP Lower Sub. (Spl) (pre) 2008 )

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Question : Cloudy nights are warmer compared to clear cloudless nights, because clouds- ( IAS (pre) 2001 )

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Question: Fruit stored in a cold chamber exhibit longer storage life because ( IAS (pre) 2013 )

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Question: In a Sitar, which type of sound vibration are produced ? ( UP RO/ARO (pre) 2021 )

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9.Heat

You are in Antarctica. The temperature is around -40 degree Celsius. To verify the actual temperature you will use this kind of thermometer?

you-are-in-antarctica-the-temperature-is-around-40-degree-celsius-to-verify-the-actual-temperature-you-will-use-this-kind-of-thermometer

Match the following:The correct match is

match-the-following

An ice in iron pan is heated till stage of vaporization. Here is the chart that show correct change in temperature with time.

an-ice-in-iron-pan-is-heated-till-stage-of-vaporization-here-is-the-chart-that-show-correct-change-in-temperature-with-time

When a substance changes its physical state to another, it is called-change of state. When ice is heated it changes into water.This process of change is called:

when-a-substance-changes-its-physical-state-to-another-it-is-called-change-of-state-when-ice-is-heated-it-changes-into-water-this-process-of-change-is-called

How many degrees are between freezing and boiling point of water in Fahrenheit?

how-many-degrees-are-between-freezing-and-boiling-in-fahrenheit

Why small gaps are left between two successive rail pieces in railway line?

why-small-gaps-are-left-between-two-successive-rail-pieces-in-railway-line

Name the substance which expand on cooling

name-the-substance-which-expand-on-cooling

Which one of the following is the correct relation between degree Celsius and degree Fahrenheit

which-one-of-the-following-is-the-correct-relation-betweenoc-and-of

There is two glasses-one of glass and another of steel. Chilled cold drink is poured half-half in each glass. You will feal which glass more cold when touched?

there-is-two-glasses-one-of-glass-and-another-of-steel-chilled-cold-drink-is-poured-half-half-in-each-glass-you-will-feal-which-glass-more-cold-when-touched

Match the following

match-the-following

Conduction is process of transfer of heat in solids from one particle to another without actual movement of the particle. However, the only liquid in which conduction is possible is

conduction-is-process-of-transfer-of-heat-in-solids-from-one-particle-to-another-without-actual-movement-of-the-particle-however-the-only-liquid-in-which-conduction-is-possible-is

Why ventilators are made near to the roof?

why-ventilators-are-made-near-to-the-roof

The flow of cold air from sea to land during the day time is called:

the-flow-of-cold-air-from-sea-to-land-during-the-day-time-is-called

Two steel glasses x and y have stuck inside of other. x is outer glass and y is inside stuck. What should be done to separate them?

two-steal-glasses-x-and-y-have-stucked-inside-of-other-x-is-outer-glass-and-y-is-inside-stucked-what-should-be-done-to-separate-them

It is hard to open the rubber lid of glass container in cold days; howerver when lid is heated it is easy to open, why?

it-is-hard-to-open-the-rubber-lid-of-glass-container-in-cold-days-howerver-when-lid-is-heated-it-is-easy-to-open-why

Electric wires sag in summer rather than winter, why?

electric-wires-sag-in-summer-rather-than-winter-why

Two thin blankets happens to give more heat than single thick blanket, it is because:

two-thin-blankets-happens-to-give-more-heat-than-single-thick-blanket-it-is-because

1 calorie is the amount of energy required to raise the temperature of 1 gm of water from------ to-------.

1-calorie-is-the-amount-of-energy-required-to-raise-the-temperature-of-1-gm-of-water-from-to

Burn injury caused by steam at 100 degree Celsius is much more severe than that caused by an equal amount of boiling water, why?

burn-injury-caused-by-steam-at-100oc-is-much-more-severe-than-that-caused-by-an-equal-amount-of-boiling-water-why

The quantity of heat required to raise the temperature of unit mass of substance by 1 degree Celsius is called specific heat. Which among the following has highest specific heat?

the-quantity-of-heat-required-to-raise-the-temperature-of-unit-mass-of-substance-by-1oc-is-called-specific-heat-which-among-the-following-has-highest-specific-heat

Calculate the amount of heat required to raise the temperature of an aluminium piece weighing 0.5 kg from 35 degree Celsius to 45 degree Celsius. Given that specific heat of lead is 900 J/kg degree Celsius.

calculate-the-amount-of-heat-required-to-raise-the-temperture-of-an-aluminium-piece-weighing-0-5-kg-from-35oc-to-45oc-given-that-specific-heat-of-lead-is-900-j-kgoc

During snow storm, the atmosphere gets

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Question: The normal temperature of human body on the Kelvin scale is- ( IAS (pre) 1995 )

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Question: Transfer of heat by convection can take place in - ( MP PCS (pre) 2017 )

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Question: The temperature point at which solid, liquid and gaseous states may stay together is known as : ( 67th BPSC (pre) 2022 )

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Question: The hand burns more steam comparatively to boiling water, because - ( UP PCS (pre) 1993 )

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Question: A liquid remains hot or cold for a long time in thermos flask because there is no loss or gain of heat by - ( UP PCS (pre) 2019 )

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Question: At what temperature are the reading of a Centigrade and Fahrenheit thermometer the same ? ( UP PCS (mains) 2015 , UP UDA/LDA (pre) 2003 , IAS (pre) 1993 )

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Question: Normal temperature of human body on Celsius scale will be- ( 41st BPSC (pre) 1996 )

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Question: Which one of the following scales of temperature doe not have a negative value ? ( UP RO/ARO (pre) 2017 )

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