Structure of the Atom — Science STD 9 — Question

When a solid block is fully immersed in water, the volume of the water displaced is:

If a particle moves in a circle with constant speed, its velocity:

White fibres of connective tissue are made up of:

1. Elastin.
2. Reticular fibre.
3. Collagen.
4. Myosin.

There are four elements P, Q, R and S having atomic numbers of 4, 18, 10 and 16 respectively. The element which can exhibit covalency as well as electrovalency will be:

1. P.
2. Q.
3. R.
4. S.

Which of the following energy is absorbed during the change of state of a substance:

Which of the following statement is correct about fertilizer?

1. It is nutrient specific.
2. It is water insoluble.
3. It is readily absorbed by the plant.
4. It is compact and easy to transfer.

The atomic number of an element X is 8 and that of element Y is 4. Both these elements can exhibit a valency of:

Which of the following quantity remains constant in a uniform circular motion:

Mitochondria are the seat of:

A linear momentum of a body can be changed by: