List of top Chemistry Questions asked in Bihar Board Class XII

The coordination number of Ni in \( [\text{Ni(C}_2\text{O}_4)_3]^{2-} \) is

\(CH_3\text{CH}_2\text{C} \, \text{NH}_2 \text{ is a} \)

Write IUPAC names of the following compounds:
(i) CH₃-CH₂-COOH (ii) CH₂=COOH (iii) ClCH₂-COOH (iv) CH₃-CH=CH-COOH (v) CH₃-CO-CH₂-COOH
Explain the following with examples: (i) Aldol condensation (ii) Cannizzaro's reaction
How would you distinguish among primary, secondary, and tertiary alcohols?
Which is Rosenmund reduction?
How is a polypeptide bond formed?
Write the IUPAC names of the following compounds:
(i) \( \text{CH}_3\text{CH}_2\text{OH} \)
(ii) \( \text{CH}_3\text{CH}_2\text{CH}_2\text{OH} \)
What do you understand by rate of a reaction? What factors affect the rate of a reaction? Discuss.
Write the principle of manufacture of ammonia by Haber’s process. How does it react with CuSO\(_4\) solution?
What is soap? How does it act in the cleansing of clothes?
Write the electronic configurations of Kr (Z = 36) and Xe (Z = 54).
Give one example of each of the following:
(i) Synthetic polymer
(ii) Condensation polymer
Why is cryolite ore used during the extraction of Al metal?
What is Schottky defect? Explain with example.
Explain effective atomic number (EAN).
Discuss the utility of DNA fingerprinting.
Write the names and formulae of two ores of iron.
Why do transition elements form complex compounds?
Arrange F₂, Cl₂, Br₂, and I₂ in the increasing order of electron affinities.
What are the main differences between physical adsorption and chemical adsorption?
The IUPAC name of \( \text{CH}_3\text{CH}_2\text{CH}_2\text{OH} \) is
What is Brownian movement?
Discuss electrochemical principle regarding rusting of iron.
What is the effect of dilution on molar conductance?