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KVPY2020ChemistrySome Basic Concepts of Chemistry

Among the following, the correct statement is :

Options

  1. A100   . has four significant figures
  2. B1 . 00 × 10 2 has four significant figures
  3. C2 . 005 has four significant figures
  4. D0 . 0025 has four significant figures

Correct answer

C. 2 . 005 has four significant figures

Step-by-step solution

There are certain rules for determining the number of significant figures. These are stated below: (1) All non-zero digits are significant. (2) Zeros preceding to first non-zero digit are not significant. Such zero indicates the position of decimal point. (3) Zeros between two non-zero digits are significant. (4) Zeros at the end or right of a number are significant provided they are on the right side of the decimal point. Hence, 2.005 has four significant figures.

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