Tissues — Science STD 9 — Question

Which flow chart correctly describes a homogeneous material?

Four balls, A, B, C and D displace 10mL, 24mL, 15mL and 12mL of a liquid respectively, when immersed completely. The ball which will undergo the maximum apparent loss in weight will be:

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

A cell placed in solution swells up. The solution is:

1. Hypertonic
2. Isotonic
3. Hypotonic
4. Both a and b

When a stone falls freely towards the earth, its total energy ?

The main source of food is/ are:

A water drop falls at regular intervals from a tap 9m above the ground. The fourth drop is leaving the tap at the instant, the first drop touches the ground. How high is the third drop at that instant?

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.

Which of the following is the seperation technique to seperate mercury and water:

An echo-sounder in a trawler (fishing boat) receives an echo from a shoal of fish 0.4s after it was sent. If the speed of sound in water is 1500m/s, how deep is the shoal?

1. 150m
2. 300m
3. 600m
4. 7500m

Pick out the wrong statement about retardation: