Environmental Science-6

1. What type of radiation is trapped on the earth’s surface by the green house effect?
a. UV rays
b. γ -rays
c. X-rays
d. IR rays

2. London smog is found in?
a. Summer during day time
b. Summer during morning time
c. Winter during day time
d. Winter during morning time

3. A tight whirlpool of wind formed in the stratosphere which surrounds Antarctica is called?
a. Polar stratospheric cloud
b. Polar Vortex
c. Both a and b
d. None of these

4. Bhopal gas tragedy occurred due to?
a. Methane
b. Phosgene
c. Methyl-isocyanate
d. Methyl amine

5. Which of the following bacteria is found in Ganga water?
a. Coliform bacteria
b. Streptococcus bacteria
c. Staphylococcus bacteria
d. Diplococcus bacteria

6. The presence of starch in raw food can be tested with
a. Dil. Iodine solution
b. Dil. HCl solution
c. Dil. NaOH solution
d. All of these

7. How many times a solution of pH = 3 be diluted to get a solution of pH = 6?
a. 2
b. 10
c. 100
d. 1000

8. The acid present in the ant sting is
a. Ethanoic acid
b. Methanoic acid
c. Citric acid
d. Tarteric acid

9. Which of the following is a sulfide ore?
a. Bauxite
b. Haematite
c. Cuprite
d. Iron pyrites

10. Which of the following does not conduct electricity?
a. Fused NaCl
b. Solid NaCl
c. Brine solution
d. Copper


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