PUC Science 2nd PUC Class 12 - Karnataka Board PUC Question Bank Solutions for Chemistry

Why are pentahalides more covalent than trihalides?

Why is BiH₃ the strongest reducing agent amongst all the hydrides of Group 15 elements?

Considering the parameters such as bond dissociation enthalpy, electron gain enthalpy and hydration enthalpy, compare the oxidising power of F₂ and Cl₂.

Discuss the general characteristics of Group 15 elements with reference to their electronic configuration, oxidation state, atomic size, ionisation enthalpy and electronegativity.

Discuss the trends in chemical reactivity of group 15 elements.

Why does R₃P=O exist but R₃N=O does not (R = alkyl group)?

Nitrogen exists as diatomic molecule and phosphorus as P₄. Why?

Write main differences between the properties of white phosphorus and red phosphorus.

Why does nitrogen show catenation properties less than phosphorus?

Arrange the following in the increasing order of property mentioned :

NH₃, PH₃, AsH₃, SbH₃, BiH₃ (Base strength)

Classify the following as primary, secondary and tertiary alcohol:

H₂C = CH – CH₂OH

Classify the following as primary, secondary and tertiary alcohol:

CH₃ – CH₂ – CH₂ – OH 

Classify the following as primary, secondary and tertiary alcohol:

Classify the following as primary, secondary and tertiary alcohol:

Classify the following as primary, secondary and tertiary alcohol:

Write the structure of 3-methyl butanal

What happens if external potential applied becomes greater than E°cell of electrochemical cell?

Write two differences between an ideal solution and a non-ideal solution.

Account for the following : Nitrogen does not form pentahalide.

Write the structure of 2-methylbutanal.