661: Acceleration due to gravity on moon is 0.166 times than that on the earth. A man weighing 60 kg on earth would weigh _______ kg on moon.
(a) 16.6 kg
(b) 30 kg
(c) 60 kg
(d) 10 kg
662: German silver is an alloy of
(a) copper, zinc and nickel
(b) copper, iron and tin
(c) iron, chromium and nickel
(d) copper, aluminium and nickel
663: India is a member of which among the following?
1. Asia-Pacific Economic Cooperation
2. Association of South-East Asian Nations
3. East Asia Summit
Select the correct answer using the code given below.
(a) 1 and 2 only
(b) 3 only
(c) 1, 2 and 3
(d) India is a member of none of them
664: With reference to agriculture in India, how can the technique of genome sequencing, often seen in the news, be used in the immediate future?
1. Genome sequencing can be used to identify genetic markers for disease resistance and drought tolerance in various crop plants.
2. This technique helps in reducing the time required to develop new varieties of crop plants.
3. It can be used to decipher the host-pathogen relationships in crops.
Select the correct answer using the code given below:
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
665: A rectangular plot of lawn shown in the figure has dimensions x and y and is surrounded by a gravel pathway of width 2 m. What is the total area of the pathway ?
(a) 2x + 2y + 4
(b) 2x + 2y + 8
(c) 4x+ 4y + 8
(d) 4x + 4y + 16