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questions
List of practice Questions
The addition of a catalyst during a chemical reaction alters which of the following quantities of the reaction?
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Chemical Kinetics
For the elementary reaction \( P \to Q \), the rate of disappearance of ‘P’ increases by a factor of 8 upon doubling the concentration of ‘P’. The order of the reaction with respect to ‘P’ is:
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Chemical Kinetics
Assertion (A):
Aliphatic primary amines can be prepared by Gabriel phthalimide synthesis.
Reason (R):
Alkyl halides undergo nucleophilic substitution with anion formed by phthalimide.
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Amines
Ligand EDTA\(^{4-}\) is an example of a:
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Coordination Compounds
Which of the following ligands forms a chelate complex?
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Coordination Compounds
Which of the following contains sp\(^2\) hybridized carbon bonded to X?
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Organic Chemistry
Which of the following is most acidic?
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Organic Chemistry
Anisole reacts with HI to give:
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Haloalkanes And Haloarenes
When MnO\(_2\) is fused with KOH in air, it gives:
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Some Applications of d- and f-Block Elements
For an electrolyte undergoing association in a solvent, the van’t Hoff factor:
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Colligative Properties
Acetic acid reacts with PCl5to give:
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Organic Chemistry
The formation of cyanohydrin from an aldehyde is an example of:
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Organic Chemistry
In the Arrhenius equation, when log k is plotted against 1/T, a straight line is obtained whose:
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Chemical Kinetics
The reaction of an alkyl halide with sodium alkoxide forming ether is known as:
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Organic Chemistry
The correct order of the ease of dehydration of the following alcohols by the action of conc. H
2
SO
4
is:
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Organic Chemistry
Which functional groups of glucose interact to form cyclic hemiacetal leading to pyranose structure?
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Biomolecules
Assertion (A):
Separation of Zr and Hf is difficult.
Reason (R):
Zr and Hf have similar radii due to lanthanoid contraction.
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Periodic properties
Assertion (A):
Aniline is a stronger base than ammonia.
Reason (R):
The unshared electron pair on nitrogen atom in aniline becomes less available for protonation due to resonance.
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Organic Chemistry
Which of the following is an allylic halide?
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Organic Chemistry
Which isomer of
\(C_4H_9Cl\)
has the lowest boiling point?
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Organic Chemistry
Write the main product in each of the following reactions:
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Biomolecules
(a) What is peptide linkage?
(b) What type of bonds hold a DNA double helix together?
(c) Which one of the following is a polysaccharide?
(d) Give one example each for water-soluble vitamins and fat-soluble vitamins.
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Organic Chemistry
Give reason for the violet colour of the complex \( [\text{Ti(H}_2\text{O)} _6]^{3+} \) on the basis of crystal field theory.
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Coordination chemistry
\( [\text{Cr(NH}_3) _6]^{3+} \) is paramagnetic while \( [\text{Ni(CN)}_4]^{2-} \) is diamagnetic. Explain why.
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Solutions
Explain why \( [\text{Fe(CN)}_6]^{3-} \) is an inner orbital complex, whereas \( [\text{Fe(H}_2\text{O)}_6]^{3+} \) is an outer orbital complex.
CBSE CLASS XII - 2024
CBSE CLASS XII
Chemistry
Solutions
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