(D) The melting point of ice decreases with an increase in pressure. Since atmospheric pressure decreases at high altitudes,the melting point of ice a

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(D) The melting point of ice decreases with an increase in pressure. Since atmospheric pressure decreases at high altitudes,the melting point of ice actually increases,meaning it does not melt faster.Therefore,the assertion is false.Additionally,atmospheric pressure is lower,not higher,at high altitudes,making the reason also false.Thus,both the assertion and the reason are incorrect.

Class 11 Chemistry States of Matter Mix Examples- States of Matter

Medium

Assertion : Ice melts faster at high altitude.
Reason : At high altitude,atmospheric pressure is high.

AIIMS 1997 All AIIMS

A
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
B
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
C
If the Assertion is correct but Reason is incorrect.
D
If both the Assertion and Reason are incorrect.

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AIIMS 1997 Paper All AIIMS years →

The normal boiling point of water is $373 \ K$ (at $760 \ mm$). The vapor pressure of water at $298 \ K$ is $23 \ mm$. If the enthalpy of vaporization of water is $40.656 \ kJ/mol$,then the boiling point of water at $23 \ mm$ pressure will be ........... $K$.

Medium

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Assertion: Use of pressure cooker reduces cooking time.
Reason: At higher pressure,cooking occurs faster.

EasyAIIMS 2000

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$A$ and $B$ are ideal gases. The molecular weights of $A$ and $B$ are in the ratio of $1: 4$. The pressure of a gas mixture containing equal weights of $A$ and $B$ is $P \text{ atm}$. What is the partial pressure (in $\text{atm}$) of $B$ in the mixture?

MediumTS EAMCET 2005

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Assertion : Wet air is heavier than dry air.
Reason : The density of dry air is more than density of water.

MediumAIIMS 1999

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At ${100\,^o}C$ and $1\ L$,if the density of liquid water is $1.0\ g\ cm^{-3}$ and that of water vapour is $0.0006\ g\ cm^{-3}$,then the volume occupied by water molecules in $1\ L$ of steam at that temperature is .................. $cm^3$.

MediumIIT 2000

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Assertion : Ice melts faster at high altitude.Reason : At high altitude,atmospheric pressure is high.

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The normal boiling point of water is $373 \ K$ (at $760 \ mm$). The vapor pressure of water at $298 \ K$ is $23 \ mm$. If the enthalpy of vaporization of water is $40.656 \ kJ/mol$,then the boiling point of water at $23 \ mm$ pressure will be ........... $K$.

Assertion: Use of pressure cooker reduces cooking time.Reason: At higher pressure,cooking occurs faster.

$A$ and $B$ are ideal gases. The molecular weights of $A$ and $B$ are in the ratio of $1: 4$. The pressure of a gas mixture containing equal weights of $A$ and $B$ is $P \text{ atm}$. What is the partial pressure (in $\text{atm}$) of $B$ in the mixture?

Assertion : Wet air is heavier than dry air.Reason : The density of dry air is more than density of water.

At ${100\,^o}C$ and $1\ L$,if the density of liquid water is $1.0\ g\ cm^{-3}$ and that of water vapour is $0.0006\ g\ cm^{-3}$,then the volume occupied by water molecules in $1\ L$ of steam at that temperature is .................. $cm^3$.

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Assertion : Ice melts faster at high altitude.
Reason : At high altitude,atmospheric pressure is high.

Assertion: Use of pressure cooker reduces cooking time.
Reason: At higher pressure,cooking occurs faster.

Assertion : Wet air is heavier than dry air.
Reason : The density of dry air is more than density of water.