280+ General Science MCQ for Indian Railways RRB JE CBT stage MCQ questions and Answers and PDF free Download
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2. Escape velocity of a rocket fired from the earth towards the moon is a velocity to get rid of the
Answer : Option
C
7. The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth's early life and solidified into hard rock's called
Answer : Option
A
9. Rain is falling vertically downwards. To a man running east-wards, the rain will appear to be coming from
Answer : Option
C
10. Gravity setting chambers are used in industries to remove
Answer : Option
D
12. Summer solstice occurs in the Northern hemisphere
Answer : Option
D
13. Rainbow is produced when sunlight fall on drops of rain. Which of the following physical Phenomena are responsible for this? I. DiffusionII. Refraction III. Internal reflection
Answer : Option
D
15. The method that cannot be used for removing permanent hardness of water is
Answer : Option
C
16. The isomerism which exists between CH3CHCI2 and CH2CI. CH2CI is
Answer : Option
D
19. Suitable impurities are added to a semiconductor depending on its use. This is done in order to
Answer : Option
C
22. Out of the following, which is not emitted by radioactive substance?
Answer : Option
C