Tissues — Science STD 9 — Question

Which of the following is not a property of particles of matter:

A car is accelerated on a levelled road and acquires a velocity 4 times of its initial velocity. During this process, the potential energy of the car:

1. Does not change.
2. Becomes twice that of initial potential energy.
3. Becomes 4 times that of initial potential energy.
4. Becomes 16 times that of initial potential energy.

Choose the incorrectly matched pair from the options given below:

The atomic numbers of four elements A, B, C and D are 12, 13, 15 and 3 respectively. The element which cannot form a cation is:

1. A
2. B
3. C
4. D

Which of the following does not have a fixed melting point/ boiling point?

The slope of a speed-time graph gives:

Contractile vacuoles take part in:

Which of the following have been artificially selected?

1. Cabbage
2. Cauliflower
3. Broccoli
4. All of these.

Pulses are rich in:

1. Carbohyfrates
2. Proteins
3. Oils
4. Vitamins and minerals.

Lysosomes are also called:

1. Suicide bags.
2. Digestive bags.
3. Demolition squads.
4. All the above.