Science (English Medium) इयत्ता ११ - CBSE Question Bank Solutions

Account for the following observations:

AlCl₃ is a Lewis acid

Express the following in the scientific notation: 

0.0048

Express the following in the scientific notation:

234,000

Express the following in the scientific notation:

8008

Express the following in the scientific notation:

500.0

Express the following in the scientific notation:

6.0012

If the speed of light is 3.0 ×10⁸ m s^-1, calculate the distance covered by light in 2.00 ns.

Write the general outer electronic configuration of s- block elements.

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?