Atoms and Molecules — Science STD 9 — Question

Which of the following statement is incorrect?

1. The particles of matter are very, very small.
2. The particles of matter attract one another.
3. The particles of some of the matter are moving constantly.
4. The particles of all the matter have spaces between them.

Molecular formula of potassium nitrate is:

The law of constant phosphorus, sulphur and krypton, the elements having the lowest and highest atomicities are respectively:

Direction of motion of a body is given by:

A body is moved through a distance of 3m in the following different ways. In which case is the maximum work done?

Mitochondria are the seat of:

1. Anaerobic respiration.
2. Trapping of sunlight.
3. Krebs cycle.
4. Calvin cycle.

Buoyant force exerted by a fluid on a given body is:

An object weighs 10N in air. When immersed fully in a liquid, it weighs only 8N. The weight of liquid displaced by the object will be:

1. 2N
2. 8N
3. 10N
4. 12N

Nucleus is not present in-

Which of the following is the exception of cell theory?