Two identical vessels are taken and painted white and black respectively. Then the same quantity of water is poured into each one of them. Both the vessels are left in the sun, and the temperature is noted regularly. The water is which vessel is likely to get hotter and why?

Rani has two bowls in front of her. Bowl P contains $150$ grams of ice, while bowl Q contains three kilograms of the same material. Both are heated and start melting. Which of the following will be true about the temperature at which the ice just starts melting, and the temperature at which the wax melts completely.

Lal conducts the following activity to check if colour has any effect on heat absorption.He takes four identical cans with the same amount of water but covered with different coloured papers and places them near a heat source as shown in the figure.

The temperature of the water in the cans is measured at regular intervals.

This experiment will not lead to correct result due to a mistake in the setup. The mistake is related to

The diagram below shows a block of wood stuck in a metal container.

Which of these is the best way to remove the block of wood undamaged?

A wet cloth was placed on a balance and left for several days. The change in its mass is shown in the graph below: What was the mass of water in the cloth at the start of the experiment?

The table below gives the melting and boiling points of a few metals.

Which of these metals remains a liquid over the widest range of temperature?

The table below gives the melting and boiling points of a few metals.

Soft solders are filler metals that melt and flow below $430 °\mathrm{C}$. Which pair of metals would be most suitable for soft solders?