Environmental Science-7

1. In moving from outer most shell to inner most shell, the energy of shells
a. increases
b. Decreases
c. remains same
d. Cannot be predicted

2. Metal which is a constituent of Haemoglobin?
a. Cu
b. Al
c. Zn
d. Fe

3. Which of the following is used for making insulation of electric wires?
a. Bakelite
b. Isoprene
c. Neoprene
d. Thiokol

4. The evaporation of water takes place from the leaves of the plants. The process is called
a. Evaporation
b. Transpiration
c. Dehumidification
d. Fumigation

5. If the energy available to the plants from the sun is 20,000J. What would be the energy available to the lion in the food chain , Plant→ Dear→ Lion
a. 20J
b. 200J
c. 2000J
d. 20000J

6. Copper obtained from copper pyrite is called blister copper. Gas responsible for the formation of blister is
a. CO2
b. CO
c. NO2
d. SO2

7. Arrange methane, ethane, propane and butane in order of increasing boiling points
a. butane<propane<ethane<methane
b. ethane< methane< propane< butane
c. methane<ethane< propane< butane
d. methane>ethane< propane< butane

8. An atom of calcium has a mass of 6.64X 10-23g. The number of calcium atom present in 10g of calcium is
a. 1.5 X 1023
b. 1.5 x 10-23
c. 6.023 X 1023
d. 2.4 x1024

9. A metal X is low in the reactivity series X can be obtained from its compounds by
a. reduction by heating
b. heating with reducing agent
c. electrolytic reduction
d. None of these

10. The process of separating suspended impurities from water is known as
a. Loading
b. Unloading
c. Distillation
d. Demineralisation

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