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questions
List of practice Questions
Phenol does not undergo nucleophilic substitution reaction easily due to:
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Amines
Which of the following compounds
will not
react with benzene sulphonyl chloride?
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Amines
Aniline on reaction with Bromine water gives:
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Amines
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
Assertion (A):
Diazonium salts of aromatic amines are more stable than those of aliphatic amines.
Reason (R):
Diazonium salts of aliphatic amines show resonance.
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Amines
Identify the tertiary amine from the following:
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Amines
Ethanol on heating with conc. H\(_2\)SO\(_4\) at 413 K gives:
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Alcohols, Phenols And Ethers
Dehydration of tertiary alcohols with Cu at 573 K gives:
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Alcohols, Phenols And Ethers
Phenol on reaction with aqueous bromine at room temperature gives:
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Alcohols, Phenols And Ethers
Consider the following reaction:
The major product obtained is:
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Alcohols, Phenols And Ethers
CH\(_3\)-O-CH\(_3\) when treated with excess HI gives:
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Alcohols, Phenols And Ethers
Match the reagents required for the given reactions:
I. Oxidation of primary alcohols to aldehydes (p) \(NaBH_4\)
II. Butan-2-one to Butan-2-ol (q) 85% phosphoric acid at 440 K
III. Bromination of Phenol to 2, 4, 6- (r) PCC Tribromophenol
IV. Dehydration of propan-2-ol to (s) Bromine water propene
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Alcohols, Phenols And Ethers
Assertion (A):
p-nitrophenol is less acidic than phenol.
Reason (R):
Nitro group is electron-withdrawing and helps in the stabilization of p-nitrophenoxide ion.
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Alcohols, Phenols And Ethers
Which functional groups of glucose interact to form cyclic hemiacetal leading to pyranose structure?
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Biomolecules
Nucleotides are composed of:
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Biomolecules
Which of the following acids represents Vitamin C?
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Biomolecules
‘Scurvy’ is caused by the deficiency of vitamin:
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Biomolecules
Two among the three components of DNA are $\beta$-D-2-deoxyribose and a heterocyclic base. The third component is:
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Biomolecules
The specific sequence in which amino acids are arranged in a protein is called:
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Biomolecules
Which of the following cells is used in hearing aids?
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Electrochemistry
During electrolysis of an aqueous solution of NaCl:
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Electrochemistry
Assertion (A):
For a Daniell cell, Zn/Zn$^{2+}$(1M) || Cu$^{2+}$(1M)/Cu with \( E_{\text{cell}} = 1.1 \, V \), if the external opposing potential is more than 1.1 V, the electrons flow from Cu to Zn.
Reason (R):
Cell acts like a galvanic cell.
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Electrochemistry
Considering the strength of the ligand, the highest excitation energy will be observed in:
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Electrochemistry
On adding AgNO\(_3\) solution to 1 mole of CoCl\(_3\)·4NH\(_3\), one mole of AgCl is precipitated. The secondary valency of Co is:
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Coordination Compounds
Ligand EDTA\(^{4-}\) is an example of a:
CBSE Class XII - 2024
CBSE Class XII
Chemistry
Coordination Compounds
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