HSC Science (General) 11th Standard - Maharashtra State Board Question Bank Solutions for Chemistry

Explain the term molality

Why does the molarity of a solution depend upon temperature?

Solve the following problem:

Find out the molar mass of the following compounds:

Copper sulphate crystal (CuSO₄.5H₂O)

(At. mass: Cu = 63.5; S = 32; O = 16; H = 1; Na = 23; C = 12; Fe = 56; N = 14)

Solve the following problem:

Find out the molar mass of the following compounds:

Sodium carbonate, decahydrate (Na₂CO₃.10H₂O)

(At. mass: Cu = 63.5; S = 32; O = 16; H = 1; Na = 23; C = 12; Fe = 56; N = 14)

Solve the following problem:

Find out the molar mass of the following compounds:

Mohr’s salt [FeSO₄(NH₄)₂SO₄.6H₂O]

(At. mass: Cu = 63.5; S = 32; O = 16; H = 1; Na = 23; C = 12; Fe = 56; N = 14)

Solve the following problem:

Write the following number in ordinary decimal form:

3.49 × 10⁻¹¹

Solve the following problem:

Write the following number in ordinary decimal form:

3.75 × 10⁻¹

Solve the following problem:

Write the following number in ordinary decimal form:

5.16 × 10⁴

Solve the following problem:

Write the following number in ordinary decimal form:

43.71 × 10⁻⁴

Solve the following problem:

Write the following number in ordinary decimal form:

0.011 × 10⁻³

Solve the following problem:

Write the following number in ordinary decimal form:

14.3 × 10⁻²

Solve the following problem:

Write the following number in ordinary decimal form:

0.00477 × 10⁵

Solve the following problem:

Perform the following calculation. Round off your answer to two digits.

`1/(3.40xx10^24)`

Solve the following problem:

Write the following number in ordinary decimal form:

5.00858585

Solve the following problem:

Perform the following calculation. Round off your answer to two digits.

`33/(9.00xx10^-4)`

Solve the following problem:

Perform the following calculation. Round off your answer to two digits.

`(1.4xx10^9)/((2.77xx10^3)(3.76xx10^5))`

Solve the following problem:

Perform the following calculation. Round off your answer to two digits.

`((4xx10^-3)(9.9xx10^-7))/((789)(1.002xx10^-10)(0.3xx10^2))`

Perform each of the following calculations. Round off your answers to three digits.

(3.26104) (1.54106)

Perform the following calculation. Round off your answer to three digits.

(8.39 107) (4.53 109)

Solve the following problem:

Perform the following calculation. Round off your answer to three digits.

`(8.94xx10^6)/(4.35xx10^4)`