1) Who gave the first evidence of the Big- Bang theory?
A. Edwin Hubble
B. Albert Einstein
C. S. Chandrasekhar
D. Stephen Hawking
Answer : A.
2) Why is it difficult to see through fog?
A. Rays of light suffer total internal reflection from the fog droplets
B. Rays of light are scattered by the fog droplets
C. Fog droplets absorb light
D. The refractive index of fog is extremely High
Answer : B.
3) Which onr the following is the most effective carrier for communications?
A. Cables
B. Microwaves
C. Optical fibres
D. Radiowaves
Answer : B.
4) Which one of the following types of waves are used in a night vision apparatus?
A. Radio waves
B. Microwaves
C. Infra-red waves
D. None of the above
Answer : C.
5) Which one of the following statement is NOT correct?
A. Milk contains none of the B-vitamins
B. Vitamin-A (retinal) deficiency leads to dry and scaly skin
C. One of the symptoms of scurvy is pain in the joints
D. Vitamin-B, (thiamine) deficiency can lead to heart failure
Answer : A.
6) Which one of the following planets has largest number of natural satellites or moons?
A. Jupiter
B. Mars
C. Saturn
D. Venus
Answer : A.
7) Which one of the following is used as an explosive?
A. Phosphorus trichloride
B. Mercuric oxide
C. Graphite
D. Nitroglycerine
Answer : D.
8) Which one of the following is not a radioactive element?
A. Uranium
B. Radium
C. Thorium
D. Cadmium
Answer : D.
9) Which one of the following is correct?
A concrete wall generally,
A. only reflects sound
B. only absorbs sound
C. only transmits sound
D. absorbs and transmits sound
Answer : D.
10) Which one of the following is considered as the easily digestible source of protein?
A. Egg albumin
B. Soybean
C. Fish flesh
D. Red meat
Answer : B.
