2661: The path of Halley's comet in its orbit around the sun is
(a) Parabolic
(b) Hyperbolic
(c) Elliptical
(d) Circular
2662: Chlorophyll is a/an:
(a) Halogen acid
(b) A green pigment found in the plants
(c) A chloro-organic compound
(d) Element
2663: Which one of the following elements is alloyed with iron to produce steel which can resist high temperatures and also have high hardness and abrasion resistance ?
(a) Aluminium
(b) Chromium
(c) Nickel
(d) Tungsten
2664: Which of the following is/are cited by the scientists as evidence / evidences for the continued expansion of universe?
1. Detection of microwave space
2. Observation of redshift phenomenon in space
3. Movement of asteroids in space
4. Occurrence of supernova explosions in space
Select the correct answer using the codes given below:
(a) 1 and 2
(b) 2 only
(c) 1, 3 and 4
(d) None of the above can be cited as evidence
2665: Assertion (A) :
The southern half of India lies within the tropics and the northern half belongs to the warm temperate zone
Reason (R) :
The tropic of cancer runs almost halfway through India
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not a correct explanation of A
(c) A is true but R is false
(d) A is false but R is true