Student Questions

Which is the longest cell in human body ?

Three objects have densities: A = 0.7 g/cm³, B = 1.2 g/cm³, C = 0.95 g/cm³. A. Which will float in water?

Assertion (A): All liquids take the shape of their container. Reason (R): Liquids flow because their particles are loosely packed.

Assertion (A): Mass remains constant in a closed system. Reason (R): Matter cannot be created or destroyed.

Assertion (A): Sugar dissolves faster in hot water. Reason (R): Heating increases the speed of water particles.

Which of the following is an example of sublimation seen in daily life?

Ravi added 10 g sugar to 100 mL water. It dissolved fully. He added more sugar until no more could dissolve. The point at which no more sugar dissolves is called:

A piece of metal sinks in water but floats in mercury. This shows that:

A stone is placed in water. The water level increases. This is because:

When 10g of salt is completely dissolved in 100g of water, the resulting salt solution will have a mass of:

Which of the following mixtures is best separated by filtration?

The point at which no more sugar dissolves is called:

A student pours oil into a glass of water and notices that the oil forms a separate layer. This means oil and water are:

A solid is placed in a beaker of water and it sinks. What can be concluded about the solid?

Assertion: When we look into the mirror, we see our own face inside the mirror Reason: Mirror is made of a transparent substance that allows light to pass through it.

Assertion: Never ever look directly at the sun that could be extremely harmful for eyes. Reason: Pinhole camera can be used to see very bright objects.

Bouncing back of light from shining surfaces is called

Which types of objects do not allow light to pass through them?

Light travels in:

Assertion (A): A force can change the shape of an object. Reason (R): When force is applied, only the mass changes, not the shape.