Question : When camphor is heated, which of the following changes will take place?

Option 1: Solid to gas

Option 2: Solid to liquid to gas

Option 3: Liquid to gas

Option 4: Solid to liquid

Question : There is a 4% increase in volume when a liquid freezes to its solid state. The percentage decrease when solid melts to liquid again is:

Option 1: $3\frac{3}{13}$%

Option 2: $4$%

Option 3: $4\frac{1}{13}$%

Option 4: $3\frac{11}{13}$%

Question : The water of the coconut is

Option 1: liquid nucellus

Option 2: liquid mesocarp

Option 3: liquid endocarp

Option 4: degenerated liquid endosperm

Question : How many solid spherical balls of radius 6 cm can be made by melting a solid hemisphere of radius 12 cm?

Option 1: 4

Option 2: 2

Option 3: 10

Option 4: 8

Question : Which of the following elements has the lowest melting point?

Option 1: Sodium

Option 2: Tin

Option 3: Radon

Option 4: Radium