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9.	A planet in space where gravity pulls so much that even light cannot get out is called as
	A.  Blue hole
	B.  Black hole
	C.  Green hole
	D.  Dark hole

Answer

Ans: B Black hole

10.	What is the value of escape velocity on the moon’s surface?
	A.  1.4 km/sec
	B.  2.4 km/sec
	C.  9.8 km/sec
	D.  11.2 km/sec

Answer

Ans: B 2.4 km/sec

11.	The age of universe is approximately __________ years.
	A.  11.8 billion
	B.  12.8 billion
	C.  13.8 billion
	D.  14.8 billion

Answer

Ans: C 13.8 billion

12.	What is the distance of the earth from the Sun?
	A.  107.7 million km
	B.  142.7 million km
	C.  146.7 million km
	D.  149.6 million km

Answer

Ans: D 149.6 million km