Question

The number of significant figures in 0.400 is
A. 1
B. 2
C. 3
D. 4

Answer 1

Explanation:

Thé number of signifiant figurés in 0.400 is

Answer is 4

D. 4

Answer 2

Answer:

Option (C) is the correct answer.

Explanation:

Rules for significant figures:-

• All digits except the number zero are always significant.
• Any zero placed in between any two non-zero digits are significant.
• Zeros placed at left of a non-zero digit and right of a decimal point are not significant.
• Zeros placed on the right of the decimal and not have a non-zero digit after that are significant.
• Zeros placed on the right of the last non-zero digit after the decimal point are significant.

According to the question,

The given number is 0.400.

Since there is only 1 non-zero digit which is significant.

And the zeros after non-zero digits in a decimal number are significant.

Thus, there are 3 significant figures in 0.400.

Hence, option (C) is correct.

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