176: Which of the following is a living fossil?
(a) Blue green algae
(b) Green algae
(c) Fungus
(d) Ginkgo
177: Match List-I (Fuel Gases) with List-II (Major Constituents) and select the correct answer using the codes given below the Lists:
List-I -- List-II
(Fuel Gases) -- (Major Constituents)
A. CNG -- 1. Carbonmonoxide, Hydrogen
B. Coal gas -- 2. Butane, Propane
C. LPG -- 3. Methane, Ethane
D. Water gas -- 4. Hydrogen, Methane, Carbonmonoxide
Codes:
A B C D
(a) 2 1 3 4
(b) 3 4 2 1
(c) 2 4 3 1
(d) 3 1 2 4
178: During a thunderstorm, the thunder in the skies is produced by the
1. meeting of cumulonimbus clouds in the sky
2. lightning that separates the nimbus clouds
3. violent upward movement of air and water particles
Select the correct answer using the codes given below.
(a) 1 only
(b) 2 and 3
(C) 1 and 3
(d) None of the above produces the thunder
179: A suitable site of a cement plant requires proximity to:
(a) Coal and iron
(b) Limestone and manganese
(c) Limestone and gypsum
(d) Coal and gypsum
180: In Mizoram, the settlement pattern is mostly of "linear type" along the ridges, because
(a) the valleys are cooler than the ridges
(b) accessibility is easier on the ridge tops
(c) the ridges are cooler than the valleys
(d) the valleys are densely forested