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Carbon Compounds Class-X

Total questions: 100

Worksheet time: 4mins

Name
Class
Date
1.

How many electrons are there in the outermost shell of a carbon atom?

a)

4

b)

12

c)

2

d)

6

2.

Which form of pure carbon is formed of layers that slide past one another?

a)

diamond

b)

graphite

c)

fullerene

d)

nanotube

3.

What is another name for carbon compounds?

a)

carbohydrates

b)

fullerenes

c)

hydrocarbons

d)

organic compounds

4.

_____________ have same molecular formula but different properties.

a)

hydrocarbons

b)

isomers

c)

organic compounds

d)

polymers

5.

How many valence electrons does sulphur atom have?

a)

1 valence electrons

b)

2 valence electrons

c)

6 valence electrons

d)

4 valence electrons

6.

Which of the following is NOT a saturated hydrocarbon ?

a)

C4H10

b)

C6H14

c)

C2H4

d)

C4H8

7.

Which one is NOT true ?

a)

ionic compounds have high melting and boiling points

b)

covalent compounds have high melting and boiling points

c)

carbon shows catenation properties

d)

carbon is tetravalent

8.

Which one has triple bond ?

a)

C2H2

b)

O2

c)

CO2

d)

C2H4

9.

Which is NOT an allotrope of carbon ?

a)

graphite

b)

diamond

c)

fluorite

d)

fullerene

10.

Which of the following is a conductor ?

a)

graphite

b)

diamond

c)

fluorite

d)

fullerene

11.

Which is NOT true ?

a)

Both diamond and graphite are formed by carbon atoms

b)

In diamond, each carbon atom is bonded to four other carbon atoms

c)

In graphite, each carbon atom is bonded to three other carbon atoms

d)

The first fullerene one to be identified was C-50

12.

Carbon has the unique ability to form bonds with other atoms of carbon, giving rise to large molecules. This property is called

a)

covalency

b)

Chelating

c)

catenation

d)

conjugation

13.

The molecular formula of heptane is

a)

C6H14

b)

C7H14

c)

C5H12

d)

C7H16

14.

The molecular formula of hexene is

a)

C6H14

b)

C6H10

c)

C5H12

d)

C6H12

15.

Butane and iso-butane have same formula because they are

a)

isomer of each other

b)

anomer of each other

c)

polymer of each other

d)

isober of each other

16.

The formula of aldehydic functional group is

a)

-CHO

b)

-OH

c)

-COOH

d)

-COOR

17.

Which one of the following is an alcohol ?

a)

CH3COOH

b)

CH3CH2CH2OH

c)

CH3CHO

d)

CH3COCH3

18.

Which of the following is the formula of methanal ?

a)

CH3OH

b)

CH3CH2OH

c)

HCOOH

d)

HCHO

19.

In the homologous series for alkenes, the first member of the series is

a)

propene

b)

methene

c)

ethane

d)

ethene

20.

5-8% dilute solution of __________ in water is used as vinegar.

a)

Ethanoic Acid

b)

Methanoic Acid

c)

Ethanol

d)

Ethanal

21.

What is the difference in molecular masses between two successive members of a homologous series ?

a)

14

b)

12

c)

24

d)

6

22.

If CnH2n+2 is the formula of propane ,

n = ?

a)

5

b)

8

c)

3

d)

6

23.

Structural isomerism is NOT possible in

a)

Methane , Ethane & Propane

b)

Butane & Pentane

c)

Pentane

d)

Hexane

24.

How many structural isomers are possible for C5H12 ?

a)

5

b)

4

c)

3

d)

2

25.

IUPAC name of the compound

CH3-CH2-Br is

a)

bromoethane

b)

bromo ethane

c)

bromoethene

d)

ethyl bromide

26.

Formula of ethanoic acid is

a)

CH3COH

b)

CH3CH2OH

c)

CH3CHO

d)

CH3CO2H

27.

The statement which is NOT true is

a)

Saturated hydrocarbons will generally give a clean flame

b)

Unsaturated hydrocarbons will give a yellow flame

c)

Saturated hydrocarbons will generally give a yellow flame

d)

A flame is only produced when gaseous substances burn.

28.

Ethanol decolourises alkaline KMnO4 . here

a)

ethanol oxidises KMnO4

b)

alkaline KMnO4 oxidises ethanol

c)

alkaline KMnO4 neutralises ethanol

d)

alkaline KMnO4 reduces ethanol

29.

Alkaline potassium permanganate or acidified potassium dichromate are oxidising alcohols to

a)

alkanes

b)

ketones

c)

aldehydes

d)

carboxylic acids

30.

Unsaturated hydrocarbons add hydrogen in the presence of catalysts such as

a)

palladium or iron

b)

iron or nickel

c)

palladium or nickel

d)

iron or platinum

31.

A + H2 ( in psesence of nickel) → C5H12

Identify 'A'

a)

C6H12

b)

C5H14

c)

C5H11

d)

C5H10

32.

CH4 + Cl2 → CH3Cl + HCl (in the presence of sunlight)

This is an example of

a)

combustion reaction

b)

addition reaction

c)

substitution reaction

d)

elimination reaction

33.

Vegetable oils can be converted into ghee by means of

a)

hydrogenation

b)

hydration

c)

oxidation

d)

methylation

34.

Ethanol + Sodium → ? + H2

a)

sodium ethoxide

b)

sodium ethanoate

c)

sodium acetate

d)

ethanoic acid

35.

Which of the following is an active ingredient of all alcoholic drinks?

a)

Ethanol

b)

Methanol

c)

Propanol

d)

Butanol

36.

Heating ethanol (CH3CH2OH) at 443 K with excess concentrated sulphuric acid results in the dehydration of ethanol to give

a)

ethanoic acid ( CH3-COOH)

b)

ethane ( H3C-CH3)

c)

ethene ( H2C=CH2)

d)

ethyne (HC≡CH)

37.

To prevent the misuse of ethanol produced for industrial use, it is made unfit for drinking by adding poisonous substances like methanol to it. This is called

a)

tincture iodine

b)

absolute alcohol

c)

poisonous alcohol

d)

denatured alcohol

38.

Intake of which alcohol even in very small quantities can cause death ?

a)

methanol

b)

ethanol

c)

absolute alcohol

d)

ethyl alcohol

39.

Which organ / body parts are severly affected by consumption of methyl alcohol ?

a)

Liver & Optic nerve

b)

Liver & Kidney

c)

Liver & heart

d)

Optic nerve & Kidney

40.

Some countries now use _________as an additive in petrol since it is a cleaner fuel.

a)

carboxylic acid

b)

aldehyde

c)

ketone

d)

alcohol

41.

Which of the statements below is NOT true ?

a)

5-8% solution of acetic acid in water is called vinegar

b)

Pure ethanoic acid often freezes during winter in cold climates

c)

Ethanoic acid is commonly called acetic acid

d)

Unlike HCl, carboxylic acids are strong acids

42.

Esterification reaction is the reaction between

a)

Carboxylic acid & Alcohol

b)

Alcohol & Alcohol

c)

Carboxylic acid & Ketone

d)

Aldehyde & Alcohol

43.

In esterification the catalyst used is

a)

Acid

b)

Base

c)

Nickel

d)

Iron

44.

These compounds are sweet smelling, used for perfumes and flavourings. They are

a)

esters

b)

acids

c)

aldehydes

d)

alcohols

45.

Saponification is the reaction of

a)

Soap & Alcohol

b)

Ethanol and conc H2SO4

c)

Acid & Alcohol

d)

Ester with NaOH

46.

Soaps are

a)

sodium or potassium salts of fatty acids

b)

bases

c)

acids

d)

esters

47.

Carboxylic acids give effervescence of CO2 when treated with

a)

NaHCO3

b)

NaOH

c)

NaCl

d)

Alcohols

48.

An example of oxidising agent is

a)

Alkaline KCl

b)

Acidified K2Cr2O7

c)

H2/Ni

d)

NaBH4

49.

What is correct about soap molecules ?

a)

hydrophobic

b)

hydrophilic

c)

hydrophilic head and hydrophobic tail

d)

non polar

50.

Hardness of water is caused due to presence of

a)

sodium and potassium salts

b)

ammonium salts

c)

calcium and magnesium salts.

d)

barium and lithium salts

51.

Detergents are generally

a)

sodium salts of carboxylic acids

b)

potassium salts of carboxylic acids

c)

ammonium or sulphonate salts of long chain carboxylic acids

d)

calcium salts of carboxylic acids

52.

Which of the following statement is correct ?

a)

Soaps are usually used to make shampoos and products for cleaning clothes

b)

Soaps do not for lather with soft water

c)

Soap form micelle so not able to clean cloths.

d)

Detergents are usually used to make shampoos and products for cleaning clothes

53.

Propane, with the molecular formula C3H8 has

a)

6 covalent bonds

b)

7 covalent bonds

c)

8 covalent bonds

d)

10 covalent bonds

54.

Propanone is a three-carbon compound with the functional group

a)

carboxylic acid.

b)

aldehyde

c)

ketone

d)

alcohol

55.

While cooking, if the bottom of the vessel is getting blackened on the outside, it means that

a)

the food is not cooked completely

b)

the fuel is not burning completely

c)

the fuel is wet

d)

the fuel is burning completely

56.

In the electron dot structure of N2 , how many dots will be there in between two N atoms ?

a)

6

b)

2

c)

4

d)

0

57.

Which of the following open chain hydrocarbons undergoes addition reactions ?

a)

C2H6

b)

CH4

c)

C3H8

d)

C2H4

58.

Which of the following is a formula of carboxylic acid ?

a)

CH2O

b)

C2H6O

c)

C6H12O6

d)

C2H4O2

59.

Which is NOT a saturated open chain hydrocarbon ?

a)

C5H12

b)

C4H10

c)

C10H22

d)

C6H12

60.

Butter and cooking oil can be distinguished by

a)

Alkaline KMnO4 test

b)

Lucas Test

c)

Ester Test

d)

Sodium Bicarbonate Test

61.

Which of the following is NOT an organic compound ?

a)

CH4

b)

CH3OH

c)

CH3COOH

d)

NaCN

62.

Which of the following compounds has the highest melting point ?

a)

CH3COOH

b)

NaCl

c)

Naphthalene

d)

Urea

63.

The major component of CNG is

a)

ethane gas

b)

methane gas

c)

butane gas

d)

mixture of butane and iso-butane gas

64.

The IUPAC name of the above compound is

a)

propene

b)

pentene

c)

propane

d)

ethene

65.

This formation is called

a)

molecules

b)

microbes

c)

mitochondria

d)

micelle

66.

This is the structural formula of

a)

propane

b)

propanol or propyl alcohol

c)

propanal

d)

propanone or acetone

67.

The above picture depicts

a)

ionic bonding

b)

coordinate bonding

c)

metallic bonding

d)

covalent bonding

68.

This the structure of

a)

diamond

b)

graphite

c)

fullerene

d)

carbon black

69.

What is correct ?

a)

The left side diagram is for graphite

b)

The left side diagram is for fullerene

c)

The right side diagram is for graphite

d)

These are not the allotropes of carbon

70.

What is the IUPAC name of iso-butane ?

a)

2-Methylbutane

b)

1-Methylpropane

c)

2-Methylpentane

d)

2-Methylpropane

71.

This is electron dot structure of

a)

carbon dioxide

b)

ethane

c)

methane

d)

ethene

72.

Which statement is NOT true ?

a)

The bonds formed by elements having larger atoms are much weaker.

b)

Carbon has the unique ability to form bonds with other atoms of carbon,

c)

One reason for the formation of strong bonds by carbon is its small size

d)

Compounds of carbon having double or triple bonds between

the carbon atoms are known as saturated carbon compounds

73.

The first organic compound synthesized from an inorganic compound by Friedrich Wöhler in 1828 was

a)

acetic acid

b)

methane

c)

urea

d)

ethanol

74.

This is the structural formula of

a)

cyclohexene

b)

cyclohexane

c)

benzene

d)

naphthalene

75.

The heteroatoms and the groups confer specific properties to the compound, called

a)

isomers

b)

hetero groups

c)

functional groups

d)

main groups

76.

In the above the 3rd diagram represents which functional group ?

a)

ketonic

b)

aldehydic

c)

carboxylic acid

d)

alcoholic

77.

Complete the series.

CH3OH, C2H5OH, C3H7OH, __________

a)

C4H10OH

b)

C3H9OH

c)

C4H9OH

d)

C4H9O

78.

The general formula for alkyne is

a)

CnH2n+4

b)

CnH2n+2

c)

CnH2n

d)

CnH2n-2

79.

The formula of pentyne is

a)

C5H10

b)

C5H12

c)

C3H4

d)

C5H8

80.

In the above table the wrong suffix is given for

a)

Alcohol

b)

Carboxylic acid

c)

Ketone

d)

Double bond

81.

The two properties of carbon which lead to the huge number of carbon compounds we see around us are

a)

trivalency & catenation

b)

tetravalency & covalency

c)

allotropy & catenation

d)

tetravalency & catenation

82.

Absolute alcohol is

a)

100% ethanol

b)

90% ehanol

c)

atleast 99% ethanol

d)

pure alcohol

83.

Ethanol may be produced by

a)

fermentation of acid

b)

oxidation of aldehyde

c)

fermentation of molasses

d)

oxidation of carboxylic acid

84.

The soap micelles are large enough to scatter light. This phenomenon is called

a)

Tyndall Effect

b)

Reflection of light

c)

Refraction of light

d)

Dispersion of light

85.

Soaps are formed by saponification of

a)

glycosides

b)

carboxylic acids

c)

alcohols

d)

simple esters

86.

Which of the following can be used for the denaturation of ethyl alcohol?

a)

Methyl alcohol

b)

Copper sulphate

c)

Pyridines

d)

All of above

87.

Covalent compounds

a)

have high melting and boiling point

b)

are mostly soluble in water

c)

are formed between atoms of metals and non-metals

d)

are formed by the sharing of electrons in the bonding atoms.

88.

The by product of soap is

a)

glycerol

b)

butene

c)

ethylene glycol

d)

isoprene

89.

The substnace not responsible for the hardness of water is

a)

Sodium nitrate

b)

calcium hydrogen carbonate

c)

calcium carbonate

d)

magnesium carbonate

90.

The isomeric pair is

a)

ethane and propane

b)

propane and butane

c)

ethane and ethene

d)

butane and 2-methylpropane

91.

Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of

a)

Addition reaction

b)

Oxidation reaction

c)

Displacement reaction

d)

Substitution reaction

92.

In which of the following compounds -OH is the functional group?

a)

Butanal

b)

Butanoic acid

c)

Butanone

d)

Butanol

93.

Structural formula of ethyne is

a)
b)
c)
d)
94.

This s formula of

a)

but-2-ene

b)

butene

c)

but-1-ene

d)

pentene

95.

Identify the unsaturated compounds from the following.

(i) Propane

(ii) Propene

(iii) Propyne

(iv) Chloropropane

a)

(i) and (ii)

b)

(ii) and (iv)

c)

(iii) and (iv)

d)

(ii) and (iii)

96.

It is the bond line formula for

a)

cyclohexane

b)

cyclopentene

c)

cyclohexene

d)

hexene

97.

Chlorine reacts with saturated hydrocarbons at room temperature in the

a)

absence of water

b)

presence of water

c)

presence of hydrochloric acid

d)

presence of sunlight

98.

Which of the following does not belong to the same homologous series?

a)

CH4

b)

C2H6

c)

C3H8

d)

C4H8

99.

The heteroatoms present in

CH3 ─ CH2 ─ O ─ CH2 ─ CH2Cl are:

(i) Oxygen

(ii) Carbon

(iii) Hydrogen

(iv) Chlorine

a)

(i) and (ii)

b)

(ii) and (iii)

c)

(iii) and (iv)

d)

(i) and (iv)

100.

The most abundant element in the human body is

a)

carbon

b)

oxygen

c)

hydrogen

d)

calcium

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