Exams › JEE Main › Chemistry

Which of the following have same number of significant figures ? (1) 0.00253 (2) 1.0003 (3) 15.0 (4) 163 Choose the correct answer from the options given below

1. A, B and C only
2. C and D only
3. B and C only
4. A, C and D only

Correct answer: A, C and D only

Solution

Options A (0.00253), C (15.0), and D (163) all have three significant figures, while option B (1.0003) has five significant figures. Therefore, A, C, and D are the only options that share the same number of significant figures.

Related JEE Main Chemistry questions

• A 100 mL sample of a urea solution contains $6.02 \times 10^{20}$ molecules of urea. What is the molarity of the solution? (Take Avogadro constant, $N_A = 6.02 \times 10^{23}\ \text{mol}^{-1}$.)
• If the relative atomic mass unit were defined as $\frac{1}{6}$ of the mass of a carbon atom instead of $\frac{1}{12}$, then the mass of one mole of a substance would
• When 4.9 g of $\mathrm{H_2SO_4}$ reacts with NaCl, the products formed are 6 g of sodium hydrogen sulphate and 1.825 g of HCl. What mass of NaCl was decomposed?
• Which of the following has the least mass?
• What amount of magnesium phosphate, $\mathrm{Mg_3(PO_4)_2}$, in moles is needed to provide 0.25 mole of oxygen atoms?
• Haemoglobin has 0.33% iron by mass. If its molecular mass is about 67200 and the atomic mass of iron is 56, how many iron atoms are present in a single haemoglobin molecule?

⚔️ Practice JEE Main Chemistry free + battle 1v1 →