What do you mean by significant figures?

एका वाक्यात उत्तर

The significant figures in measurement or result are the number of digits known with certainty plus one uncertain digit.

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पाठ 2: Introduction to Analytical Chemistry - Exercises [पृष्ठ २३]

पाठ 2 Introduction to Analytical Chemistry
Exercises | Q 2. (B) (i) | पृष्ठ २३

Choose the correct option:

The number of significant figures in 1.50 × 10⁴ g is __________

Choose the correct option:

In Avogadro’s constant 6.022 × 10²³ mol^-1, the number of significant figures is ________

State the rules for deciding significant figures.

Distinguish between accuracy and precision.

Why there is a need of rounding off figures during calculation?

Why is accurate measurement crucial in science?

Solve the following question:

Round off the following quantity to two significant figures:

0.00254 m

Solve the following question:

Round off the following quantity to two significant figures:

199 g

Solve the following question:

Round off the following quantity to three significant figures:

1.43 cm³

Solve the following question:

Round off the following quantity to three significant figures:

643 cm²

Solve the following question:

Round off the following quantity to three significant figures:

6.398 × 10^-3 km

Express the following sum to the appropriate number of significant figures:

2.3 × 10³ mL + 4.22 × 10⁴mL + 9.04 × 10³ mL + 8.71 × 10⁵ mL