Page568
People, Development and Environment
9.73
ASSESS YOUR LEARNING
(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 the cor-
rect explanation of (A).
(c) (A) is true, but (R) is false.
(d) (A) is false, but (R) is true.
78.
Identify the gas by looking at the following statements.
1.
The gas has the highest calorific value.
2.
That gas causes the least pollution when burnt.
3. That gas can be produced with the splitting of
water.
4.
A Mission has been launched under the name of
that gas.
(a) Oxygen
(b) Hydrogen
(c) Methane
(d) Nitrogen
79.
Which of the following ...

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