Science (English Medium) Class 11 - CBSE Question Bank Solutions

Write the significance and limitations of octet rule.

At 450 K, K_p= 2.0 × 10¹⁰/bar for the given reaction at equilibrium.

\[\ce{2SO2(g) + O2(g) ⇌2SO3 (g)}\]

What is K_c at this temperature?

How will you convert benzene into m-nitrochlorobenzene?

How will you convert benzene into p -nitrotoluene?

How will you convert benzene into acetophenone?

Addition of HBr to propene yields 2-bromopropane, while in the presence of benzoyl peroxide, the same reaction yields 1-bromopropane. Explain and give mechanism.

Discuss the pattern of variation in the oxidation states of  B to Tl.

Discuss the pattern of variation in the oxidation states of C to Pb.

Explain the difference in properties of diamond and graphite on the basis of their structures.

Rationalise the given statement and give a chemical reaction:

Lead (II) chloride reacts with Cl₂ to give PbCl₄.

Explain the following reaction.

Silicon is heated with methyl chloride at high temperature in the presence of copper.

Explain why is there a phenomenal decrease in ionisation enthalpy from carbon to silicon?

Write suitable chemical equations to show the nature of the following oxide.

Tl₂O₃

Elements of group 14 ________.

Discuss the general characteristics and gradation in properties of alkaline earth metals.

Beryllium and magnesium do not give colour to flame whereas other alkaline earth metals do so. Why?

Which one of the alkaline earth metal carbonates is thermally the most stable?

What do you understand by electron-rich compounds of hydrogen? Provide justification with a suitable example.

What characteristics do you expect from an electron-deficient hydride with respect to its structure and chemical reactions?

Do you expect the carbon hydrides of the type (C_nH_{2n + 2}) to act as ‘Lewis’ acid or base? Justify your answer.