B M Sharma Solutions for Chapter: Thermometry, Thermal Expansion And Calorimetry, Exercise 2: DPP

$540 \mathrm{g}$ of ice at $0°\mathrm{C}$ is mixed with $540 \mathrm{g}$ of water at $80°\mathrm{C}$. The final temperature of the mixture is _____$°\mathrm{C}$.

 Heat required to convert one gram of ice at $0 °\mathrm{C}$ into steam at $100 °\mathrm{C}$ is _____$\mathrm{cal}$. ( given that ${\mathrm{L}}_{\mathrm{Steam}}=536 \mathrm{cal}/\mathrm{gm}$)

$80 \mathrm{g}$ of water at $30 °\mathrm{C}$ is poured on a large block of ice at $0 °\mathrm{C}$. The mass of ice that melts is _____$\mathrm{g}$.

Two spheres made of same substance have diameters in the ratio $1:2$. If their thermal capacities are in the ratio of $1:x$ then $x$ is _____.

Work done in converting one gram of ice at $-10°\mathrm{C}$ into steam at $100°\mathrm{C}$ is _____$\mathrm{J}$.

A body of mass $5 \mathrm{kg}$ falls from a height of $30 \mathrm{metre}$. If its all mechanical energy is changed into heat, then heat produced will be _____$\mathrm{cal}$ .

In supplying $400 \mathrm{calories}$ of heat to a system, the work done will be _____$\mathrm{J}$. Take one calorie as $4.18 \mathrm{J}$.

$0.93 \mathrm{watt}-\mathrm{hour}$ of energy is supplied to a block of ice weighing $10 \mathrm{g}$. It is found that _____.

A. Half of the block melts            B.   The entire block melts and the water attains a temperature of 4°C       

C. The entire block just melts      D. The block remains unchanged

(Fill the correct answer as A or B or C or D)