Chemistry MCQs
Topic Notes: Chemistry
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
61
The reaction of carboxylic acids with alcohols in presence of cone. H2SO4 is called _________________?
Answer:
esterification
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62
Esters are formed by reaction of
Answer:
Alcohol and acid
Esters are formed by the condensation reaction between an alcohol and a carboxylic acid. This is known as esterification.
63
What chemical structure characterizes acidic amino acids?
Answer:
2 carboxylic groups and 1 amino group
Acidic amino acids are defined by the presence of two carboxylic acid groups (-COOH) that can donate protons, making them acidic. They also possess one amino group (-NH2) that can accept protons.
64
Which of the following is not an amino acid?
Answer:
lactic acid
Lactic acid is not an amino acid, it is a carboxylic acid. Amino acids, on the other hand, are organic compounds that contain both an amino group and a carboxyl group. Glumatic acid, aspartic acids, and glycine are all examples of amino acids.
65
What type of carboxylic acid is depicted in the blank?
Answer:
maleic acid
Maleic acid is an unsaturated carboxylic acid, meaning it has a carbon-carbon double bond. This distinguishes it from the other options, which are all saturated carboxylic acids.
66
What is the product of methyl alcohol oxidation using acidified K2Cr2O7?
Answer:
Formic acid
Methyl alcohol (CH3OH) is oxidized to formic acid (HCOOH) when treated with acidified K2Cr2O7, a strong oxidizing agent. This reaction involves the conversion of the primary alcohol to a carboxylic acid, resulting in formic acid as the product.
67
Ethanoic acid is also called as
Answer:
Acetic Acid
Image result for Ethanoic acid is also called as Acetic acid (CH3COOH), also called ethanoic acid, the most important of the carboxylic acids.
68
The general formula for carboxylic acids is
Answer:
R-COOH
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69
What is the product of acid hydrolysis of acetaldehyde cyanohydrin?
Answer:
Lactic acid
Acetaldehyde cyanohydrin undergoes acid hydrolysis to form lactic acid, a process involving the hydrolysis of the cyanohydrin to yield a carboxylic acid, specifically lactic acid, through the intermediate formation of an alpha-hydroxy acid.
70
Long-chain carboxylic acids are named as
Answer:
fatty acids
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