How many images of an object are formed if two adjacent walls and the ceiling of a rectangular room are mirror surfaced?

This planet, _______ is yellowish in colour and has many rings and satellites.

A. Uranus

B. Jupiter

C. Neptune

D. Saturn

Pasteurized milk does not need to be boiled. Why?

Write the $pH$ value of the

1. Saliva (before meal)

2. Saliva (after meal)

3. Lemon juice

4. Colourless aerated drink

5. Carrot juice

6. Coffee

7. Tomato juice

8. Tap water

What are natural things? Give an example?

Group of animals which gives wool are:

A. Sheep, goat, camel, yak

B. Sheep, camel, lion, rabbit

C. Rabbit, silkworm, buffalow, cow

D. Goat, cat, sheep, camel