HSC Science (General) ११ वीं कक्षा - Maharashtra State Board Question Bank Solutions for Chemistry

1.00 g of a hydrated salt contains 0.2014 g of iron, 0.1153 g of sulfur, 0.2301 g of oxygen, and 0.4532 g of water of crystallisation. Find the empirical formula. (At. wt.: Fe = 56; S = 32; O = 16)

Solve the following problem:

An organic compound containing oxygen, carbon, hydrogen, and nitrogen contains 20% carbon, 6.7% hydrogen, and 46.67% nitrogen. Its molecular mass was found to be 60. Find the molecular formula of the compound.

Solve the following problem:

A compound on analysis gave the following percentage composition by mass: H = 9.09; O = 36.36; C = 54.55. Mol mass of compound is 88 g mol⁻¹. Find its molecular formula.

Solve the following problem:

Carbohydrates are compounds containing only carbon, hydrogen, and oxygen. When heated in the absence of air, these compounds decompose to form carbon and water. If 310 g of a carbohydrate leaves a residue of 124 g of carbon on heating in absence of air, what is the empirical formula of the carbohydrate?

Write the drawbacks of Rutherford’s model of an atom.

Write the characteristics of adsorption.

Explain why a finely divided substance is more effective as adsorbent?

Mention factors affecting adsorption of a gas on solids.

Explain why a finely divided substance is more effective as an adsorbent?

Explain how the adsorption of a gas on solid varies with the nature of adsorbate and adsorbent.

Explain how the adsorption of gas on solid varies with the surface area of adsorbent.

Write statement for Law of Mass action.

Write an expression for the equilibrium constant with respect to concentration.

Derive mathematically value of K_P for \[\ce{A_{ (g)} + B_{ (g)} ⇌ C_{ (g)} + D_{ (g)}}\].

Relate the terms reversible reactions and dynamic equilibrium.

Explain the significance of formal charge with the help of a suitable example

What do you mean by formal charge?

Explain the dynamic nature of chemical equilibrium with a suitable example.

Explain the Relation between K_C and K_P.

Explain rate of reaction.