List of top Questions asked in Maharashtra Class XII

Identify ‘A’, ‘B’ and ‘C’ in the following chain reaction and rewrite the chemical reactions: \[ CH_3CH_2OH \xrightarrow{\text{red P}, \, Br_2} A \xrightarrow{\text{KCN, alc.}} B \xrightarrow{\text{LiAlH}_4, \text{Ether}} C \]

Harvesting:

Define Lanthanide contraction. Write the balanced chemical equation when acidified $ K_2Cr_2O_7 $ reacts with $ H_2S $.

Appeal:
Prepare an ‘Appeal’ on the topic ‘Traffic Rules for Safety Measures’ with the help of the following points (100 to 150 words):
- Ignorance and lack of knowledge and information
- Purpose / need of obedience
- Avoid accidents / need of society
- Discipline

Humanistic psychology school of thought is proposed by __________.

Explain any two methods of promoting empathy.

What are chromosomal disorders? Describe Turner’s syndrome and Klinefelter’s syndrome.

Derive an expression for maximum work obtainable during isothermal reversible expansion of an ideal gas from initial volume $ V_1 $ to final volume $ V_2 $.

If the unit of the rate constant is $ \text{mol} \, (\text{dm}^{-3} \text{s}^{-1}) $, the order of the reaction would be ____________.

Arrange the following steps of DNA fingerprinting in correct sequence:
(a) Gel electrophoresis (b) Isolation of DNA (c) Southern blotting (d) Restriction digestion

Prove by vector method, the angle subtended on a semicircle is a right angle.

Silver Nitrite

What are interhalogen compounds? Write the chemical reaction when chlorine reacts with dry slaked lime.

Derive an expression for maximum speed of a vehicle moving along a horizontal circular track.

Prove that: \[ \int_0^{2a} f(x) dx = \int_0^a f(x) dx + \int_0^a f(2a - x) dx. \] Hence show that: \[ \int_0^\pi \sin x \,dx = 2 \int_0^{\pi/2} \sin x \,dx. \]

The perpendicular distance of the plane $ r \cdot (3\hat{i} + 4\hat{j} + 12\hat{k}) = 78 $ from the origin is __________.

Express the following switching circuit in symbolic form of logic. Construct the switching table.

How many meiotic divisions are required for the formation of 300 seeds in angiosperm?

Why are amines basic in nature? Among dimethylamine (pK$_b$ = 3.27) and diethylamine (pK$_b$ = 3.0), which one is more basic?

Blog:
Write a ‘Blog’ in a proper format on ‘Body Language’ with the help of the following points (100 to 150 words):
- Meaning and features
- Characteristics and scope
- Benefits / Importance
- Uses / Ways to utilize

Explain Wolff-Kishner reduction reaction. Write the preparation of propanone by using ethanoyl chloride and dimethyl cadmium.

Describe the pyramid of energy with the help of a diagram.