1266: Sun's halo is produced by the refraction of light in
(a) Water vapour, in Stratus clouds
(b) Ice crystals in Cirro-Cumulus clouds
(c) Ice crystals in Cirrus clouds
(d) Dust particles in Stratus clouds
1267: Out of the three annual examinations, each with a total of 500 marks, a student secured average marks of 45% and 55% in the first and second annual examinations. To have an overall average of 60%, how many marks does the student need to secure in the third annual examination ?
(a) 450
(b) 400
(c) 350
(d) 300
1268: Match List-I (New Names of the Countries) with List-II (Old Names of the Countries) and select the correct answer using the codes given below the Lists :
List-I List-II
(New Names ) (Old Names )
A. Benin 1. Nyasaland
B. Belize 2. Basutoland
C. Botswana 3. Bechuanaland
D. Malawi 4. British Honduras
5. Dahomey
Codes:
A B C D
(a) 3 1 2 4
(b) 5 4 3 1
(c) 3 4 2 1
(d) 5 1 3 4
1269: With reference to the mineral resources of India, consider the following pairs:
Mineral : 90% Natural sources in
1. Copper : Jharkhand
2. Nickel : Orissa
3. Tungsten : Kerala
Which of the pairs give above is/are correctly matched?
(a) 1 and 2 only
(b) 2 only
(c) 1 and 3 only
(d) 1, 2 and 3
1270: What is the principle by which a cooling system (Radiator) in a motor car works ?
(a) Convection
(b) Conduction only
(c) Both conduction and radiation
(d) Radiation only