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Question (1)

QN0035727

A calorimeter of water equivalent contains of water at . ' ' grams of steam at is mixed in it till the temperature of the mixture is . The value of ' ' is close to (Latent heat of water , specific heat of water

(A)
2
(B)
4
(C)
3.2
(D)
2.6

Correct Answer: A

Explanation:

Heat given by water

Heat taken by steam

From the principal of calorimeter,

Heat lost Heat gained

.

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Question (2)

QN0035728

A beaker contains of water. The heat capacity of the beaker is equal to that of of water. The initial temperatue of water in the beaker is . If of hot water at is poured in it, the final temperature, neglecting radiation loss, will be nearest to

(A)
(B)
(C)
(D)

Correct Answer: B

Explanation:

Let the final temperature be .

Then

Solving it, we get .

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Question (3)

QN0035729

of water at is added to of ice at . The final temperature of the mixture is

(A)
(B)
(C)
(D)

Correct Answer: D

Explanation:

Which is not possible. Hence

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Question (4)

QN0035730

of water at is added to of ice at . The final temperature of the mixture is

(A)
(B)
(C)
(D)

Correct Answer: D

Explanation:

Which is not possible. Hence

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Question (5)

QN0035731

The tempertaure of equal masses of three different liquids A, B and are and respectively. The temperature when and are mixed is and when and are mixed is . The temperature when and are mixed is

(A)
(B)
(C)
(D)

Correct Answer: C

Explanation:

Heat gain heat lost

and

If is the temperature when and are mixed then,

On solving equations (i) and (ii)

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Question (1)

A calorimeter of water equivalent contains of water at . ' ' grams of steam at is mixed in it till the temperature of the mixture is . The value of ' ' is close to (Latent heat of water , specific heat of water

Explanation:

Link:

Question (2)

A beaker contains of water. The heat capacity of the beaker is equal to that of of water. The initial temperatue of water in the beaker is . If of hot water at is poured in it, the final temperature, neglecting radiation loss, will be nearest to

Explanation:

Link:

Question (3)

of water at is added to of ice at . The final temperature of the mixture is

Explanation:

Link:

Question (4)

of water at is added to of ice at . The final temperature of the mixture is

Explanation:

Link:

Question (5)

The tempertaure of equal masses of three different liquids A, B and are and respectively. The temperature when and are mixed is and when and are mixed is . The temperature when and are mixed is

Explanation:

Link:

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