Force and Laws of Motion — Science STD 9 — Question

Phloem in the plants perform the function of:

1. Conduction of food.
2. Conduction of water.
3. Providing support.
4. Photosynthesis.

Which one of the following is not a chemical change?

1. Formation of curd.
2. Ripening of banana..
3. Sublimation of naphthalene.
4. Corrosion of photo frame.

A ball is travelling with uniform translatory motion.This means that

Choose the correct statement:

The property/ properties which enable copper metal to be used for making electric wires is/ are:

1. Copper metal is malleable and ductile.
2. Copper metal is a good conductor of electricity.
3. Copper metal is ductile and has low electrical resistance.
4. Copper metal is sonorous and an excellent conductor of electricity.

To solve the food problem of country, which among the following necessary?

1. Increased production and storage food grains.
2. Easy access of people to the food grain.
3. People should have money to purchase the grains.
4. All the above.

One of the following is not a vector quantity. This one is:

1. Displacement.
2. Speed.
3. Acceleration.
4. Velocity.

The symbols of the elements cobalt, aluminium, helium and sodium respectively written by a student are as follows. Which symbol is the correct one?

1. CO
2. AL
3. He
4. So

Which of the following is a mismatch?

1. Leprosy- bacterial infection.
2. AIDS- bacterial infection.
3. Malaria- protozoan infection.
4. Elephantiasis- nematode infection.

The longest cell in the human body is:

1. Nerve cell.
2. Muscle cell.
3. Liver cell.
4. Kidney cell.