Chemical Bonding: MCQ Test (25 questions)

Question 1 of 25

An ionic bond is formed when

ACombining atoms gain electrons
BThe combining atoms lose electrons.
CCombination of a metallic element with a nonmetallic element
DTwo metallic elements react with each other

Question 2 of 25

An example of a covalent compound is

AKCI
BBaO
CCHCI,
DCaH

Question 3 of 25

electrovalent bond is formed

Abetween positive ions
Bbetween negative ions
Cbetween oppositely charged ions
Dnone of these

Question 4 of 25

Which of the following compounds does not have ionic bonding?

Apotassium nitrate
Bsodium chloride
Ccalcium chloride
Dmethane

Question 5 of 25

The molecule with linear structure is

ACO²
BNO²
CSO²
DS¹ O²

Question 6 of 25

Which of the following has electrovalent bond?

AO²
BCH⁴
CCHCl³
DNaBr

Question 7 of 25

Mark the compound which has covalent and co-ordinate bonds.

AH²O
BNH⁴CI
CSO³
DSO²

Question 8 of 25

Which one of the following is a covalent compound?

Acalcium chloride
BMagnesium Fluoride
Csodium chloride
Dcarbon tetrachloride

Question 9 of 25

An anion is formed when

Aatom gains electron
Batom loses electron
CAtom receives a money order from outside
Dthe proton is ejected from the atom

Question 10 of 25

Sodium chloride contains

Acovalent bond
BSub-covalent promise
Celectrovalent bond
Dnone of these

Question 11 of 25

Methane molecule has—

Abivalent bond
Btrivalent bond
Csingle covalent bond
Dnone of these

Question 12 of 25

The shape of carbon tetrachloride molecule is

Apyramidal
Bsquare planar
Ctetrahedral
DDistorted tetrahedral

Question 13 of 25

A cation is formed when

Aatom gains electron
Batom loses electron
CThe atom receives positive charge from outside
Dthe proton is ejected from the atom

Question 14 of 25

What happens when a chemical bond is formed?

AEnergy is always absorbed
BEnergy is always released
CMore energy is released than is absorbed
DEnergy is neither absorbed nor released.

Question 15 of 25

Covalent compounds have low melting and boiling points because

AThese are less active.
BThey do not ionize in water.
CThese are usually insoluble in water.
DIntermittent burns are weak in these

Question 16 of 25

Liquid sodium chloride can conduct electric current because it contains

Afree electrons
Bfree ions
Cfree molecules
Dsodium and chlorine atoms

Question 17 of 25

Which of the following molecules has an electrovalent bond?

ACCl⁴
BN²
CCH⁴
DCaCl²

Question 18 of 25

In which of the following compounds hydrogen bonding is present?

AHF
BHCl
CHBr
DHI

Question 19 of 25

Hydrogen chloride is a gas, but hydrogen fluoride is a low-volume liquid because

AH-F bond is strong
BThe H-F bond is weak
CDue to hydrogen bonding, molecules get associated.
DHydrogen fluoride is a weak acid

Question 20 of 25

Which of the following compounds has tetrahedral shape?

Aammonia
Bcarbon tetrachloride
CWater
DAcetylene

Question 21 of 25

When two atoms of the same element combine, the nature of the bond between them will be

AIonic
Bcovalent
CPolar covalent
Dnonpolar covalent

Question 22 of 25

The shape of the ethylene molecule is

Aunilinear
Btetrahedral
Cflat triangular
Doctahedral

Question 23 of 25

Which of the following compounds does not have hydrogen bonding?

ACH²
BH²O
CNH³
DCH³COOH

Question 24 of 25

Hydrogen has a tendency to gain one electron and attain the electronic configuration of helium. This tendency is similar to—

Afrom alkali metals
Bfrom inert gases
Cfrom alkaline earth metals
Dfrom halogens

Question 25 of 25

The high boiling point of water is due to

AIts higher specific heat
BIts higher dielectric constant
Clow dissociation of water molecules
Dhydrogen bonding in water molecules