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Q.

Select the incorrect statement

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a

One femto gram is equal to 10 ^{-- 18} g

b

One zetta gram is equal to 10²¹ g.

c

There are two significant figures in 0.00032

d

There are three significant figures in 3.05 x 10²⁰

answer is C.

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Detailed Solution

detailed_solution_thumbnail

(1, 2, 4) are correct

Statement (3) is incorrect
Correct (3) : One femto gram = 10^-15 g.
Explanation of (1,2, 4)
(l) Zero to the left of the first non-zero digit in a number are
significant
(2) In scientific notation, the significant figures of only for the
first factors are counted
(4) It is correct

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