Question

I. CHOOSE THE CORRECT ANSWER:
1. The meaning of ‘digestion’ is
a. Combining complex molecules
b. Synthesizing complex molecules
c. Breaking down complex molecules.
d. Releasing energy from complex molecules
2. Type of mirror that is used as a rear view mirror in vehicles is
a. Plane mirror b. convex mirror c. concave mirror d. None of these 3. Yeast is used in wine and beer industries because it respires
a) aerobically producing oxygen.
b) aerobically producing alcohol.
c) anaerobically producing alcohol.
d) anaerobically producing CO2.

4. The number of valence electrons in the following element is
a. 2 b. 4 c. 6 d. 8
5. Bile juice is stored in
a. Pancreas
b. Liver
c. Gall bladder
d. Stomach
6. Which statement identifies why oxygen is classified as a pure substance and air is classified as a mixture?
a. Oxygen is more reactive than air.
b. Oxygen has a higher density than air.
c. Oxygen goes under a phase change, whereas air is always a gas.
d. Oxygen contains only one substance, but air contains several substances.
7. Splitting of white light into spectrum of seven colours is called
a. Reflection b. refraction c. Dispersion d. lateral inversion
8. Grass is rich in_____________, a special kind of carbohydrate which can be only digested by ruminants.
a. Glucose b. Sucrose c. Fructose d. Cellulose
9. The walls of large intestine helps in the absorption of
a. water b. protein c. carbohydrate d. roughage
10. Latha is observing her image in a plane mirror. The distance between the mirror and her image is 6m. If she moves 2m towards the mirror, then the distance between Latha and her image will be
a. 8m b. 4m c. 10m d. 5m
11. Which of the following would be an example of a chemical formula?
a. C6H12O6
b. F= ma
c. 2 H2 + O2 -> 2 H2O
d. 6.02 x 10 23

Answer 1

Answer:

1.c

2.b

3.c

4.d

5.c

6.d

7.c

8.d

9.a

10.b

11.a

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