General Studies Quiz

1.Cloudy nights are warmer because 
(a)clouds prevent radiation of heat from ground to air      (b)of low atmospheric pressure
(c)of the compact density of air                              (d)more dust particles gather in the air
2.If we go to the Himalayas, we feel breathless because
(a)it is very cold there                                   (b)the density of air is much less on the hills so  
(c)the density of air is high on the hills reducing oxygen content 
(d)none of these

3.What is the approximate velocity of sound in air?
(a)3 m/s (b)30 m/s (c)300 m/s (d)3000 m/s

4.In deserts clouds do not precipitate because of 
(a)low pressure (b)low humidity         (c)high wind velocity (d)low temperature

5.An echo is produced by the ----------------- of sound waves
(a)refraction (b)absorption (c)reflection (d)diffraction

6.Coating of iron with zinc is known as
(a)galvanization (b)electroplating  (c)lionization    (d)none of these

7.Which of the following is not a primary colour?
(a)blue (b)green (c)red (d)black

8.Speed of light in water is 3/4 of that in air. What is the refractive index of water?
(a)3/4 (b)4/3 (c)1/4 (d)0

9.In the case of a concave mirror, the image of an object is
(a)real, erect and diminished when the object lies beyond the centre of curvature
(b)real, inverted and of the same size as the object when it lies between the centre of curvature and focus
(c)real, inverted and diminished when the object lies beyond the centre of curvature
(d)not real, large and unproportional

10.Sound travels fastest through
(a)vacuum (b)steel (c)water (d)air

Answer

Q	A	Q	A
1	a	6	a
2	b	7	d
3	c	8	b
4	b	9	c
5	c	10	b