MAH-MHT CET (PCM/PCB) entrance exam Question Bank Solutions

The reaction in which 2 molecules of chlorobenzene reacts with metallic sodium in presence of dry ether forming diphenyl is an example of ______.

How many gram of sodium (atomic mass 23 u) is required to prepare one mole of ethane from methyl chloride by Wurtz reaction?

Haloarenes are less reactive than alkyl halides towards nucleophilic substitution because ____________ in aryl halide.

What is the entropy change (in J K⁻¹ mol⁻¹) when one mole of ice is converted into water at 0°C? (The enthalpy change for the conversion of ice to liquid water is 6.0 kJ mol⁻¹ at 0°C)

In how many of the following, ∆S is positive?

i. Melting of ice

ii. Sublimation of iodine

iii. Dissolution of CuSO₄ in water

iv. Condensation of water vapour

v. Dissociation of H₂ molecule into atoms

vi. Conversion of carbon dioxide gas to dry ice

vii. Vaporization of acetone

The only radioactive element among the lanthanoids is ____________.

K_sp of a sparingly soluble salt AB is 1 × 10⁻⁸. When [A⁺] = 10⁻⁴ M, which of the following concentrations of B⁻ will NOT give precipitate of AB?

In which of the following, ∆S is positive?

Which of the following is responsible for the solubility of lithium compounds in organic solvents?

When lanthanoids (Ln) are heated to about 2800 K with carbon, the carbides with general formula ____________ are obtained.

Optical isomerism is exhibited by ____________.

What is the product of the following reaction?

\[\ce{H3C - C ≡ CH + H - OH ->[{40%}H2SO4][{1%}HgSO4] ?}\]

For the reaction:

\[\ce{2Cl_{(g)} -> Cl2_{(g)}}\]

Calculate the total volume occupied by 48 g oxygen and 42 g nitrogen at STP.

Which one of the following has ΔS⁰ greater than zero?

What is the general molecular formula of the product obtained on reacting lanthanoids (Ln) with nitrogen?

The real gas obeys ideal gas laws only at ____________.

The most suitable reagent(s) required to prepare 1-iodobutane from but-1-ene is/are ____________.

Which is the INCORRECT property of lanthanoids?

Which element among the following lanthanoids has the smallest atomic radius?