When the temperature rises, what happens to the peak of the curve in the Maxwell–Boltzmann distribution graph?
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Correct answer: (B) Shifts forward and downward
1 marks · 2023 · Set A
Question 102
Plotting a graph between temperature and reaction rates can reveal the temperature dependence of reaction rates through
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Correct answer: (C) rate constant and temperature
1 marks · 2023 · Set A
Question 103
What effect does temperature have on the half-life of a first-order reaction?
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Correct answer: (D) More than one of the above
1 marks · 2023 · Set A
Question 104
Only a simple homogeneous reaction requires which of the following methods?
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Correct answer: (D) More than one of the above
1 marks · 2023 · Set A
Question 105
A first-order reaction is 50% complete in 30 minutes. Calculate the time it takes to complete 87.5% of the reaction.
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Correct answer: (C) 90 minutes
1 marks · 2023 · Set A
Question 106
In a reaction, what is the driving force?
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Correct answer: (C) Free energy
1 marks · 2023 · Set A
Question 107
What is the heat of reaction for ethyl acetate hydrolysis?
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Correct answer: (C) Zero
1 marks · 2023 · Set A
Question 108
What is produced by the reaction of natural gas and steam in the Haber–Bosch process?
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Correct answer: (A) Hydrogen
1 marks · 2023 · Set A
Question 109
In what form does nitrogen occur in plants?
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Correct answer: (C) Nitrate
1 marks · 2023 · Set A
Question 110
What happens to the size of atoms in p-block elements when moving from left to right in the same period?
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Correct answer: (C) Size decreases.
1 marks · 2023 · Set A
Question 111
When copper chips are exposed to concentrated nitric acid, which gas is produced?
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Correct answer: (B) Nitrogen(IV) oxide
1 marks · 2023 · Set A
Question 112
When ammonia is oxidized to form nitric acid, which catalyst is used?
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Correct answer: (A) Platinum-rhodium gauze
1 marks · 2023 · Set A
Question 113
Which statement about hypophosphorous acid is incorrect?
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Correct answer: (A) It is also called phosphonic acid.
1 marks · 2023 · Set A
Question 114
Which of the following compounds has phosphorus in the +5 oxidation state?
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Correct answer: (A) Peroxodiphosphoric acid
1 marks · 2023 · Set A
Question 115
Why is nitrogen preferred in welding and cooling materials?
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Correct answer: (A) It is an inert gas.
1 marks · 2023 · Set A
Question 116
The term ‘pnictogen’ refers to which group?
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Correct answer: (A) Group 15
1 marks · 2023 · Set A
Question 117
Producer gas is defined as which of the following mixtures?
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Correct answer: (C) Carbon monoxide and nitrogen
1 marks · 2023 · Set A
Question 118
Any substance made up of multiple repeating units, called _____, is referred to as a polymer.
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Correct answer: (A) mers
1 marks · 2023 · Set A
Question 119
Which of the following polymers does not fall within the configuration category?
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Correct answer: (A) Cross-linked
1 marks · 2023 · Set A
Question 120
Which of the following is not an example of a thermoplastic?
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Correct answer: (B) Epoxy
1 marks · 2023 · Set A
Question 121
Which of the following criteria does not apply to polymers?
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Correct answer: (C) Number of monomers
1 marks · 2023 · Set A
Question 122
Which of the following does not belong to the category of natural polymers?
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Correct answer: (C) Rayon
1 marks · 2023 · Set A
Question 123
The synthesis of which polymer necessitates the regular loss of small molecules?
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Correct answer: (B) Nylon-6,6
1 marks · 2023 · Set A
Question 124
The crystallinity of a polymer rises as its brittleness
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Correct answer: (A) increases
1 marks · 2023 · Set A
Question 125
The polymer absorbs _____ and expands.
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Correct answer: (A) water
1 marks · 2023 · Set A
Question 126
Which short-chain, low-molecular-weight polymers are known as liquid or gas polymers?
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Correct answer: (B) Oligo-polymers
1 marks · 2023 · Set A
Question 127
Which of the following stages is not part of addition polymerization?
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Correct answer: (B) Recrystallization
1 marks · 2023 · Set A
Question 128
A disaccharide is formed when two monosaccharides are bonded together by a
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Correct answer: (A) glycosidic bond
1 marks · 2023 · Set A
Question 129
Sucrose is a _____ chemical, and the combination of its hydrolysis products is _____ in nature.
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Correct answer: (C) dextrorotatory, laevorotatory
1 marks · 2023 · Set A
Question 130
Which of the following statements about maltose is incorrect?
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Correct answer: (B) It is a non-reducing sugar.
1 marks · 2023 · Set A
Question 131
Which of the following statements about starch is incorrect?
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Correct answer: (C) It is a reducing carbohydrate.
1 marks · 2023 · Set A
Question 132
RNA lacks which nitrogen base?
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Correct answer: (A) Thymine
1 marks · 2023 · Set A
Question 133
Lysine is an example of a polar but uncharged amino acid. Which of the following is one?
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Correct answer: (A) Serine
1 marks · 2023 · Set A
Question 134
Which of the following chemical classes does not belong to the vast group of carbohydrates?
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Correct answer: (D) More than one of the above
1 marks · 2023 · Set A
Question 135
Which of the following statements about metabolism is false?
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Correct answer: (A) It is due to this process that biomolecules do not have a turnover.
1 marks · 2023 · Set A
Question 136
How can we make an amine from an amino acid?
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Correct answer: (C) Removal of carbon dioxide
1 marks · 2023 · Set A
Question 137
When converting a disaccharide to monosaccharides, which bond is hydrolyzed?
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Correct answer: (B) Glycosidic bond
1 marks · 2023 · Set A
Question 138
To obtain carboxylic acids directly from alcohol, which oxidizing agent is used?
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Correct answer: (C) Acidified KMnO₄
1 marks · 2023 · Set A
Question 139
When phenol reacts with bromine water, what is the result?
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Correct answer: (C) White precipitate
1 marks · 2023 · Set A
Question 140
The Lucas test was carried out on three compounds, A, B and C. A and B were turbid at ambient temperature, while C did not become turbid until heated. Which compound has a tertiary structure?
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Correct answer: (D) More than one of the above
1 marks · 2023 · Set A
Question 141
Which compound is formed when secondary alcohols are oxidized by [O]?
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Correct answer: (C) Ketone
1 marks · 2023 · Set A
Question 142
Which of the following processes does not result in the production of alcohol?
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Correct answer: (B) Free-radical halogenation of alkenes
1 marks · 2023 · Set A
Question 143
Conversion of trialkyl borane to an alcohol does not require which of the following?
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Correct answer: (C) Diborane
1 marks · 2023 · Set A
Question 144
Ethers may be used as solvents because they react only with which of the following reactants?
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Correct answer: (C) Acids
1 marks · 2023 · Set A
Question 145
An aryl carbon can be found in which of the following compounds?
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Correct answer: (B) Phenol
1 marks · 2023 · Set A
Question 146
It is called a _____ ether when the alkyl groups connected to either side of the oxygen atom are different.
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Correct answer: (A) mixed
1 marks · 2023 · Set A
Question 147
Which of the following alcohols is not polyhydric?
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Correct answer: (C) Cyclohexanol
1 marks · 2023 · Set A
Question 148
Which of the following reactions can result in ketones?
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Correct answer: (B) Oxidation of secondary alcohols
1 marks · 2023 · Set A
Question 149
The Rosenmund reaction can produce which of the following carbonyl compounds?
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Correct answer: (B) Benzaldehyde
1 marks · 2023 · Set A
Question 150
The reaction that occurs between aldehydes and ketones is called