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Chapter 3
3.14
ASSESS YOUR LEARNING
(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
40.
The passage clearly brings out the finding that:
(a) Black carbon causes global warming
(b) Dust causes global warming
(c) Dust modifies the radiative properties of snow
cover to the same extent as black carbon
(d) Black carbon and dust are competing agents in
melting of snow packs
Practice Passage 9
Read the following passage and answer the questions.
Ideally, scientists deduce conclusions from general laws
that they know to be true. For example, ...

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