481: Consider the following:
1. Photosynthesis
2. Respiration
3. Decay of organic matter
4. Volcanic action
Which of the above add carbon dioxide to the carbon cycle on Earth
(a) 1 and 4 only
(b) 2 and 3 only
(c) 2, 3 and 4 only
(d) 1, 2, 3 and 4
482: Consider the following statements regarding power sector in India :
I. The installed capacity of power generation is around 95000 MW.
II. Nuclear plants contribute nearly 15% of total power generation.
III. Hydroelectricity plants contribute nearly 40% of total power generation.
IV. Thermal plants at present account for nearly 80% of total power generation.
Which of these statements is/are correct ?
(a) I only
(b) II and III
(c) III and IV
(d) I and IV
483: Which one of the following satisfies the relationship
D d a : a D D : : R r b : ?
(a) D D A
(b) R R R
(c) b R R
(d) B B r
484: The terms Wanna Cry, Petya and Eternal Blue' sometimes mentioned in the news recently are related to
(a) Exo-planets
(b) Crypto-currency
(c) Cyber attacks
(d) Mini satellites
485: Match List I with List II and select the correct answer using the codes given below the lists :
List I List II
I. Potassium bromide (A) Fertiliser
II. Potassium nitrate (B) Photography
III. Potassium sulphate (C) Bakery
IV. Mono-potassium tartarate (D) Gunpowder
Codes:
(a) I-B, II-D, III-A, IV-C
(b) I-B, II-D, III-C, IV-A
(c) I-D, II-B, III-C, IV-A
(d) I-D, II-B, III-A, IV-C