List of top Questions asked in Maharashtra Class XII- 2024

HF, HCl, HBr, HI (thermal stability)

MF, MCl, MBr, MI (ionic character)
\(\text{HClO}, \text{HClO}_2, \text{HClO}_3, \text{HClO}_4\) (acidic strength)

Arrange the following in the increasing order of the property mentioned:

(i) HClO, HClO₂, HClO₃, HClO₄ (acidic strength)

(ii) MF, MCl, MBr, MI (ionic character)

(iii) HF, HCl, HBr, HI (thermal stability)

For the reaction \( A + B \rightarrow P \):
If \( [B] \) is doubled at constant \( [A] \), the rate of reaction doubles.
If \( [A] \) is tripled and \( [B] \) is doubled, the rate of reaction increases by a factor of 6.
Calculate the rate law equation.
Alcoholic Sodium Hydroxide

What is the action of the following on ethyl bromide ?
(a) silver nitrite
(b) Mg in dry ether 
(c) alcoholic sodium hydroxide

Calculate the standard enthalpy of combustion of methane, if the standard enthalpy of formation of methane, carbon dioxide, and water are \( -74.8 \), \( -393.5 \), and \( -285.8 \) kJ mol\(^{-1} \) respectively.

Write chemical reactions involved in Cannizzaro Reaction of Methanal

Write chemical reactions involved in Gattermann-Koch Formylation

Write chemical reactions involved in Rosenmund Reduction

What is osmotic pressure? How will you determine the molar mass of a solute from osmotic pressure?

Write the structure and name of the monomer of Natural rubber

Write the structure and name of the monomer of Nylon-6.

Henry’s constant for CH\(_3\)Br(g) is 0.159 mol dm\(^{-3}\) bar\(^{-1}\) at 25\(^{\circ}\)C. Calculate its solubility in water at 25\(^{\circ}\)C if its partial pressure is 0.164 bar.

Calculate the time required to deposit 2.4 g of Cu, when 2.03 A of current is passed through \( \text{CuSO}_4 \) solution. 
(At. mass of Cu = 63.5 g mol\(^{-1}\))

Write the condition of reverse osmosis.
Write the SI unit of molar conductivity.

The compounds of \( \text{Ti}^{4+} \) ions are colourless due to ___________.

Write the sign convention of work done during the expansion of gas.
What is meant by personality? Explain any five factors shaping personality.
Explain the types of intelligence tests with advantages and disadvantages.

Explain the nature of Post-Traumatic Stress Disorder (PTSD).
Points:
(i) Meaning 
(ii) Shock stage 
(iii) Suggestible stage 
(iv) Recovery stage 
 

Explain the basic emotions given by Paul Ekman.
Points:
(i) Happiness 
(ii) Sadness 
(iii) Anger 
(iv) Fear 
 

Explain the laws of perceptual organization with suitable diagrams.
Points:
(i) Law of proximity 
(ii) Law of similarity 
(iii) Law of continuity 
(iv) Law of closure