491: They are fantastically diverse. They speak hundreds of languages and dialects. They comprise scores of ethnic groups. They include highly industrialised economies and up-and-coming economies. They span half the surface of the earth and are home to two-fifths of the world's population. The group of countries referred to here belongs to
(a) SAPTA
(b) APEC
(c) EC
(d) CIS
492: Match List-I with List-II and select the correct answer using the code given below the lists :
List I
(Finding/Invention/ Calculation)
A. Time Taken by the Earth to orbit the Sun
B. Calculation of the value of (pi)
C. Invention of the digit zero
D. The game of snakes and ladders
List II
(Ancient Indian Scholar)
1. Aryabhatta
2. Bhaskaracharya
3. Budhayana
4. Gyandev
(A) 2 4 1 3
(B) 1 3 2 4
(C) 1 4 2 3
(D) 2 3 1 4
493: The first Leader of the opposition to get recognition in the Indian Parliament was:
(a) Y. B. Chavan
(b) Ram Subhag Singh
(c) A. K. Gopalan
(d) C. M. Stephen
494: Assertion (A): The main constituent of the Liquefied Petroleum Gas is methane.
Reason (R): Methane can be used directly for burning in homes and factories where it cab be supplied through pipelines.
(a) Both A and R are individually true and R is the correct explanation of A.
(b) Both A and R are individually true but R is not the correct explanation of A
(c) A is true but R is false.
(d) A is false but R is true.
495: If a gas is compressed to half of its original volume at 27°C, to what temperature should it be heated to make it occupy its original volume ?
(a) 327°C
(b) 600°C
(c) 54°C
(d) 300°C