# Ice at −20°c is added to 50 g of water at 40° c. when the temperature of the mixture reaches 0°c, it is found that 20 g of ice is still un melted. The amount of ice added to the water was close to (specific heat of water =4.2 J/g/°c) Specific heat of Ice=2.1 J/g/°C Heat of fusion of water at 0°C = 334 J/g) (a) 50g (b) 40g (c) 60g (d) 100g

## Question ID - 50308 :- Ice at −20°c is added to 50 g of water at 40° c. when the temperature of the mixture reaches 0°c, it is found that 20 g of ice is still un melted. The amount of ice added to the water was close to (specific heat of water =4.2 J/g/°c) Specific heat of Ice=2.1 J/g/°C Heat of fusion of water at 0°C = 334 J/g) (a) 50g (b) 40g (c) 60g (d) 100g

3537

Let amount of ice is m gm.

According to principal of calorimeter

Heat taken by ice=heat given by water

∴20×2.1×m+(m−20)×334 = 50×4.2×40

376 m=8400+6680

M=40.1

 In the figure shown below, the charge on the left plate of the 10 capacitor is −30 ? The Charge on the right plate of the 6 capacitor is (a) −18 μC (b) −12 μC (c) +12μC (d) +18 μF 