Question 1

Which of the following does not react with PCl5 A)CH₃OH B)CH₃COOH C)CH₃CHO D)C₂H₆

Accepted Answer

PCl5 reacts with alcohols, carboxylic acids, and aldehydes to form their respective chlorides. However, it does not react with methane (CH4), which is represented in option D as C₂H₆, indicating a molecule with only single bonds and no functional groups that can react with PCl5.

Question 2

Which of the following compounds is insoluble even in hot concentrated H₂SO₄……… A)Ethylene B)Benzene C)Hexane D)Aniline

Accepted Answer

Hexane is a non-polar hydrocarbon and does not dissolve in polar solvents like concentrated sulfuric acid, even when heated.

Question 3

A reaction between methyl magnesium bromide and ethyl alcohol gives&#8230;&#8230;&#8230;.&#10;A)Methane&#10;B)Ethane&#10;C)Propane&#10;D)Butane

Accepted Answer

The reaction between methyl magnesium bromide (a Grignard reagent) and ethyl alcohol results in the formation of methane. This occurs because the Grignard reagent reacts with the proton (H+) from the alcohol, leading to the formation of a hydrocarbon (in this case, methane) and a magnesium alkoxide.

Question 4

Methane and ethane both can be obtained in single step from ………… A)CH₃ I B)C₂H₅I C)CH₃OH D)C₂H₅OH

Accepted Answer

Methane (CH4) and ethane (C2H6) can be obtained in a single step from methane iodide (CH3I) through reactions such as halogenation and Wurtz reaction, respectively.

Question 5

Paraffin wax is&#8230;&#8230;&#8230;..&#10;A)Ester&#10;B)Alcohol&#10;C)Unsaturated hydrocarbon&#10;D)Saturated Hydrocrabon

Accepted Answer

Paraffin wax is a saturated hydrocarbon, meaning it consists of chains of carbon atoms surrounded by hydrogen atoms with single bonds between the carbon atoms.

Question 6

The number of possible enantiomeric pairs that can be produced during monochlorination of 2- methylbutane is &#8230;&#8230;..&#10;A)2&#10;B)3&#10;C)4&#10;D)1

Accepted Answer

2-methylbutane has three types of hydrogen atoms that can be replaced by chlorine to give different products. However, only one of these replacements leads to a chiral center, thus producing an enantiomeric pair.

Question 7

Petroleum consists mainly of&#8230;&#8230;&#8230;&#8230;&#10;A)Aliphatic hydrocarbons&#10;B)Aromatic hydrocarbons&#10;C)Aliphatic alcohols&#10;D)None of these

Accepted Answer

Petroleum primarily consists of aliphatic hydrocarbons, which are compounds made up of carbon and hydrogen atoms arranged in straight chains, branched chains, or non-aromatic rings.

Question 8

Petroleum ether can be used as&#8230;&#8230;&#8230;.&#10;A)Solvent for fat, oil, varnish and rubber&#10;B)As a fuel&#10;C)Both (a) and (b)&#10;D)None of these

Accepted Answer

The answer of Petroleum ether can be used as&#8230;&#8230;&#8230;.&#10;A)Solvent for...

Question 9

Which of the following are produced from coaltar&#8230;&#8230;&#8230;..&#10;A)Synthetic dyes&#10;B)Drugs&#10;C)Perfumes&#10;D)All the three

Accepted Answer

Coal tar is a byproduct of the production of coke, a solid fuel that contains mostly carbon, and it is used to produce many substances, including synthetic dyes, drugs, and perfumes. These products are derived from the chemical processing of coal tar and its components.

Question 10

In alkanes, the bond angle is&#8230;&#8230;..&#10;A)109.5&#176;&#10;B)109&#176;&#10;C)120&#176;&#10;D)180&#176;

Accepted Answer

In alkanes, the carbon atoms are sp3 hybridized, leading to a tetrahedral geometry with bond angles of approximately 109.5°.

Question 11

In the preparation of alkanes; a concentrated aqueous solution of sodium or potassium salts of saturated carboxylic acid are subjected to&#8230;&#8230;&#8230;&#10;A)Hydrolysis&#10;B)Oxidation&#10;C)Hydrogenation&#10;D)Electrolysis

Accepted Answer

The answer of In the preparation of alkanes; a concentrated...

Question 12

Halogenation of alkanes is an example of&#8230;&#8230;&#8230;..&#10;A)Electrophilic substitution&#10;B)Nucleophilic substitution&#10;C)Free-radical substitution&#10;D)Oxidation

Accepted Answer

The answer of Halogenation of alkanes is an example of&#8230;&#8230;&#8230;..&#10;A)Electrophilic...

Question 13

Propionic acid is subjected to reduction with hydroiodic acid in the presence of a little P, the product formed is&#8230;&#8230;&#8230;&#8230;&#10;A)Ethane&#10;B)Propane&#10;C)Butane&#10;D)None of these

Accepted Answer

The answer of Propionic acid is subjected to reduction with...

Question 14

When ethyl iodide and propyl iodide react with Na in the presence of ether, they form&#8230;&#8230;&#8230;&#10;A)One alkane&#10;B)Two alkanes&#10;C)Four alkanes&#10;D)Three alkanes

Accepted Answer

The answer of When ethyl iodide and propyl iodide react...

Question 15

The alkane that yields two isomeric monobromo derivatives is&#8230;&#8230;&#8230;&#8230;&#8230;&#10;A)Neopentane&#10;B)Ethane&#10;C)Methane&#10;D)Propane

Accepted Answer

The answer of The alkane that yields two isomeric monobromo...

Question 16

Kerosene is a mixture of&#8230;&#8230;&#8230;&#8230;.&#10;A)Alkanes&#10;B)Aromatic compounds&#10;C)Alcohols&#10;D)Aliphatic acids

Accepted Answer

The answer of Kerosene is a mixture of&#8230;&#8230;&#8230;&#8230;.&#10;A)Alkanes&#10;B)Aromatic compounds&#10;C)Alcohols&#10;D)Aliphatic acids...

Question 17

When petroleum is heated the vapours contain mainly&#8230;&#8230;&#8230;&#8230;.&#10;A)Kerosene&#10;B)Petroleum ether&#10;C)Diesel&#10;D)Machine oil

Accepted Answer

The answer of When petroleum is heated the vapours contain...

Question 18

Iso-octane is mixed to the petrol&#8230;&#8230;&#8230;&#8230;.&#10;A)To precipitate inorganic substances&#10;B)To prevent freezing of petrol&#10;C)To increase boiling point of petrol&#10;D)As an antiknock

Accepted Answer

The answer of Iso-octane is mixed to the petrol&#8230;&#8230;&#8230;&#8230;.&#10;A)To precipitate...

Question 19

Cyclohexane, a hydrocarbon floats on water because&#8230;&#8230;&#8230;&#8230;&#10;A)It is immiscible with water&#10;B)Its density is low as compared to water&#10;C)It is non-polar substance&#10;D)It is immiscible and lighter than water

Accepted Answer

The answer of Cyclohexane, a hydrocarbon floats on water because&#8230;&#8230;&#8230;&#8230;&#10;A)It...

Question 20

Natural gas contains mainly&#8230;&#8230;&#8230;&#8230;.&#10;A)Methane&#10;B)n-butane&#10;C)n-octane&#10;D)Mixture of octane

Accepted Answer

The answer of Natural gas contains mainly&#8230;&#8230;&#8230;&#8230;.&#10;A)Methane&#10;B)n-butane&#10;C)n-octane&#10;D)Mixture of octane...

Question 21

Which compound is not inflammable……….. A)CCl₄ B)C₂H₅OH C)CH₄ D)C₆H₆

Accepted Answer

The answer of Which compound is not inflammable……….. A)CCl₄ B)C₂H₅OH C)CH₄ D)C₆H₆...

Question 22

Propane is obtained from propene, by which of the following methods&#8230;&#8230;&#8230;.&#10;A)Wurtz reaction&#10;B)Dehydrogenation&#10;C)Frankland reaction&#10;D)Catalytic hydrogenation

Accepted Answer

The answer of Propane is obtained from propene, by which...

Question 23

LPG is a mixture of…………. A)C₆H₁₂+ C₆H₆ B)C₄H₁₀+ C₃H₈ C)C₂H₄ + C₂H₂ D)C₂H₄ + CH₄

Accepted Answer

The answer of LPG is a mixture of…………. A)C₆H₁₂+ C₆H₆ B)C₄H₁₀+ C₃H₈ C)C₂H₄...

Question 24

Carbon black, which is used in making printer's ink, is obtained by decomposition of&#8230;&#8230;&#8230;&#8230;.&#10;A)Acetylene&#10;B)Benzene&#10;C)Carbon tetrachloride&#10;D)Methane

Accepted Answer

The answer of Carbon black, which is used in making...

Question 25

The addition of tetraethyl lead to petrol&#8230;&#8230;&#8230;&#8230;&#10;A)Lowers its octane number&#10;B)Raises its octane number&#10;C)May raise or lower the octane number&#10;D)Has no effect on octane number

Accepted Answer

The answer of The addition of tetraethyl lead to petrol&#8230;&#8230;&#8230;&#8230;&#10;A)Lowers...

Deck 2: Alkanes and Petroleum