Explore topic-wise MCQs in Chemistry.

This section includes 335 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.

1.

A bond formed by the transfer of electrons between atoms of the elements is called

A. ionic bond
B. covalent bond
C. co-ordinate bond
D. Hydrogen bond
Answer» B. covalent bond
2.

The structure of ethylene is

A. linear
B. tetrahedral
C. octahedral
D. triangular
Answer» E.
3.

A bond formed by sharing of electrons between atoms of the elements is called

A. ionic bond
B. covalent bond
C. co-ordinate bond
D. none
Answer» C. co-ordinate bond
4.

The number of - bonds in N2 molecule is

A. 1
B. 2
C. 3
D. 4
Answer» C. 3
5.

What are the types of bonds present in CuSO4 5H2O ?

A. Electrovalent and covalent
B. Electrovalent and co-ordinate
C. Electrovalent, covalent, co-ordinate and hydrogen bond
D. Covalent and co-ordinate covalent
Answer» D. Covalent and co-ordinate covalent
6.

The compound which contains ionic bond is?

A. CH
B. N
C. CaCI
D. CCI
Answer» D. CCI
7.

Formation of cation occurs by

A. gain of electron
B. loss of electron
C. gain of protons
D. loss of proton
Answer» C. gain of protons
8.

The octet rule is not valid for which one of the following molecule ?

A. CO
B. H
C. S
D. NH
E. BF
Answer» E. BF
9.

Formation of anions occurs by

A. loss of neutrons
B. gain of protons
C. gain of electrons
D. none
Answer» D. none
10.

H2O is liquid and H2 is a gas because

A. oxygen forms stronger hydrogen bond than sulphur
B. oxygen less electronegative than sulphur
C. atomic radius of oxygen is less than that of sulpur
D. atomic radius of oxygen is greater than that of sulpur
Answer» B. oxygen less electronegative than sulphur
11.

With reference to ionic compounds, consider the following statement:
(1) Ionic compounds are insoluble in alcohol.
(2) Ionic compounds in the solid state are good conductor of electricity
Which of these statements is/are correct ?

A. Only 1
B. Only 2
C. Both 1 and 2
D. Neither 1 nor 2
Answer» B. Only 2
12.

The maximum number of hydrogen bonds in a H2O molecule is

A. 1
B. 2
C. 3
D. 4
Answer» E.
13.

Strongest bond is

A. C = C
B. C - C
C. C C
D. all are equally stong
Answer» D. all are equally stong
14.

Hydrogen bonding is maximum in

A. Ethanol
B. Diethyl ether
C. Ethyl chloride
D. Triethyl amine
Answer» B. Diethyl ether
15.

Which of following compound in non-polar ?

A. HCI
B. CH
C. CI
D. CHCI
E. CCI
Answer» E. CCI
16.

Vander Wall's force is maximum in

A. HBr
B. LiBr
C. LiCI
D. AgBr
Answer» E.
17.

Which one has hydrogen bonding ?

A. HCI
B. HBr
C. HF
D. HI
Answer» D. HI
18.

Which molecule has one unpaired electron ?

A. NO
B. CO
C. O
D. None of these
Answer» B. CO
19.

Which has Covalent bond ?

A. Na
B. S
C. AICI
D. NaH
E. MgCI
Answer» C. AICI
20.

NaCI has

A. covalent bond
B. ionic bond
C. co-ordinate bond
D. none
Answer» C. co-ordinate bond
21.

The geometry of CCI4 is

A. tetrahedral
B. triangular
C. Linear
D. octahedral
Answer» B. triangular
22.

The number of o-bond in H2 molecule is

A. 2
B. 3
C. 1
D. 4
Answer» D. 4
23.

The hybridization of C in CO2 is

A. sp
B. sp
C. sp
D. None of these
Answer» B. sp
24.

Which one of the following is the correct statement ? The force binding the nucleons inside the nucleus is :

A. charge dependent
B. strong and highly repulsive
C. a central force
D. charge independent
Answer» E.
25.

What is the term used to denote the critical temperature at which the air becomes saturated with vapour and below which the condensation is likely to begin ?

A. Condensation point
B. Evaporation point
C. Dew point
D. Point of critical temperature.
Answer» D. Point of critical temperature.
26.

Soap helps in cleaning clothes, because

A. chemical of soap change
B. it increases the surface tension of the solution
C. it absorbs the dirt
D. it lowers the surface tension of the solution
Answer» E.
27.

Which one of the following mixtures is homogeneous?

A. Starch and sugar
B. Methanol and water
C. Graphite and charcoal
D. Calcium carbonate and calcium bicarbonate
Answer» C. Graphite and charcoal
28.

Increase in the atomic radii in a group is due to increase in the number of

A. neutrons
B. electrons
C. protons
D. shells
Answer» E.
29.

The value of ionic product of water is

A. 298K
B. 198K
C. 892K
D. 928K
Answer» B. 198K
30.

The second ionization energy of Mg is

A. 1450kJmol
B. 1451kJmol
C. 1453kJmol
D. 1452kJmol
Answer» B. 1451kJmol
31.

The atomic number of carbon is

A. 1
B. 5
C. 6
D. 7
Answer» D. 7
32.

The number of electrons in valence shell of first element of period is

A. two
B. one
C. three
D. four
Answer» C. three
33.

the Ionic radius of hydrogen in pm is

A. 207
B. 208
C. 205
D. 206
Answer» C. 205
34.

The covalent radius of carbon is

A. 77.2pm
B. 77.3pm
C. 77.5pm
D. 77.4pm
Answer» C. 77.5pm
35.

The bond length in C-C is

A. 0.134
B. 0.154
C. 0.116
D. 0.112
Answer» C. 0.116
36.

The energy of an element which is required to remove an electron from its gaseous atom to form an ion is

A. nuclear
B. positional
C. kinetic
D. ionization
Answer» E.
37.

The formation of compounds PF5, SF6, BCl3 are not according to the rule of

A. octet
B. doublet
C. triplet
D. none
Answer» B. doublet
38.

Atomic radii is determined by measuring the distance between the centers of adjacent atoms with the help of

A. X-rays
B. Y-rays
C. Z-rays
D. none
Answer» B. Y-rays
39.

The force of which ultimately results in difficult removal of electron is

A. attraction force
B. repulsive force
C. electric force
D. nuclear force
Answer» B. repulsive force
40.

The valence electrons of Mg lies in

A. 3s
B. 3p
C. 3d
D. 2s
Answer» B. 3p
41.

Free radical substitution is the over all reaction alkanes and halogens involving

A. propagation step
B. initiation step
C. all of them
D. termination step
Answer» D. termination step
42.

The least volatile element is

A. fluorine
B. iodine
C. chlorine
D. bromine
Answer» C. chlorine
43.

Fluorine is the most

A. electronegative element
B. positive element
C. high tendency element
D. a and b
Answer» B. positive element
44.

The ionization energy which is required to remove an electron after removal of first electron is

A. first
B. second
C. third
D. fourth
Answer» C. third
45.

The distance between potassium chloride is equal to the sum of the radii of two ions, it is determined by

A. Rutherford
B. bohar
C. alberuni
D. Paul
Answer» E.
46.

The atomic number of potassium is

A. 17
B. 19
C. 16
D. 18
Answer» C. 16
47.

In group of periodic table the ionization energy is

A. increase
B. decrease
C. remain same
D. changes time to time
Answer» C. remain same
48.

The number of major groups which are vertical numbers is

A. eight
B. seven
C. five
D. nine
Answer» B. seven
49.

When the two atoms come close to each other due to attractive forces then the potential energy of system is

A. increased
B. decreased
C. finished
D. none
Answer» C. finished
50.

The electropositive elements are at a higher energy state then the

A. ionic radii
B. electronegative elements
C. neutral elements
D. atomic radii
Answer» C. neutral elements