Force and Laws of Motion — Science STD 9 — Question

The atomicities of ozone, sulphur, phosphorus and argon are respectively:

In which case the rate of evaporation is higher:
(1) A test tube filled with water.
(2) China dish filled with water.

The botanical name of Egyptian clover is:

Mast cells occur in ______________?

Name the cell organelle which is called the Control room of the cell.

An object attached to one end of a spring makes 20 vibrations in 10s. Its frequency is:

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.

Basic taxonomic category is:

1. Population.
2. Spices.
3. Variety.
4. Breed.

The chemical symbol for sodium is:

............... plays a crucial role in detoxifying many poisons and drugs in a cell.