Carbon and its Compounds

The type of flame produced when saturated alcohols undergo combustion is ____.

Correct! Wrong!

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Saturated alcohols produce non-sooty flame.

The carbon atom can only form ____ bond.

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The carbon atom always forms covalent bond by sharing of electrons.

A covalent bond is represented by the electron dot structure.

Correct! Wrong!

A covalent bond is represented by the electron dot structure.

Most fuels are made of ____ compounds.

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Most fuels are made of carbon compounds. These fuels combine with oxygen during combustion and release energy.

The molecular formula of ethane is ____.

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The molecular formula of ethane is C2H6.

The number of electrons a carbon atom requires to attain an octet configuration is ____.

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A carbon atom requires 4 electrons to attain an octet configuration.

The valency of carbon is ____.

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The valency of carbon is 4 as it has 4 valence electrons.

The organic acid present in vinegar is ____.

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Ethanoic acid is the organic acid present in vinegar.

Which one of the following is not a covalent carbon compound?

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Baking soda is not a covalent carbon compound but an ionic compound and its formula is NaHCO3.

Which alcohol is used in the manufacture of beverages?

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Ethyl alcohol is used in the manufacture of alcoholic beverages.

The major component of bio-gas and compressed natural gas is ____.

Correct! Wrong!

Methane is the major constituent of bio-gas and compressed natural gas.

Hydrogenation is the ____.

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Hydrogenation is the addition of hydrogen.

Ethyl alcohol is soluble in water.

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Ethyl alcohol is highly soluble in water in all proportions.

The alkaline hydrolysis of oil or fat gives soap and ____.

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The alkaline hydrolysis of oil or fat gives soap and glycerol.

Which of the following is the main constituent of natural gas?

Correct! Wrong!

Methane is the main constituent of natural gas.

The shape of a micelle is ____.

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A soap molecule forms a spherical micelle when dissolved in water.

The suffix for ketone functional group is ____.

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The suffix for ketone functional group is -one.

The process by which ethyl alcohol is obtained from molasses is called ____.

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Ethyl alcohol is obtained by the fermentation of molasses.

Chemically similar compounds differing by a −CH2 unit are called ____.

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Chemically similar compounds differing by a −CH2 unit are called homologues.

Which of the following is used as an oxidising agent?

Correct! Wrong!

Alkaline potassium permanganate is an oxidising agent.

Ethyl alcohol burns with ____ flame.

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Ethyl alcohol burns in air with blue flame.

The colour of the flame of unsaturated carbon compounds is ____.

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The colour of the flame of unsaturated compounds is yellow.

The substance that alters the speed of the reaction without itself undergoing any change is called ____.

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A catalyst is a substance that alters the speed of the reaction without itself undergoing any change.

Soaps are ____ salts of fatty acids.

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Soaps are sodium or potassium salts of long chain carboxylic acids (fatty acids).

The number of carbon atoms present in one molecule of ethane is ____.

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One molecule of ethane has 2 carbon atoms.

Which is the first member of alkanes?

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Methane is the first member of alkanes.

The electronic configuration of carbon is ____.

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The electronic configuration of carbon is 2, 4.

The coloured alcohol is called an ester.

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The coloured alcohol is called denatured alcohol and not an ester.

Covalent compounds have ____.

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Covalent compounds possess low melting and boiling points.

Which of the following is not a crystalline allotropic form of carbon?

Correct! Wrong!

Coke is the amorphous form of carbon.

CBSE Class 10th Science 4 - Carbon and its compounds MCQs
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