Chemistry MCQs

Option A: MnO2

Option B: Zn

Option C: AgO2

Option D: cadmium

Correct Answer: Zn ✔

Option A: 1.25g/cm3

Option B: 1.3g/cm3

Option C: 1.20g/cm3

Option D: 1.15g/cm3

Correct Answer: 1.25g/cm3 ✔

Option A: rechargeable

Option B: non rechargeable

Option C: electrolytic cell

Option D: Daniel cell

Correct Answer: rechargeable ✔

Option A: to get oxidized

Option B: to get reduced

Option C: to accept electrons

Option D: both B and C

Correct Answer: both B and C ✔

Option A: higher

Option B: lower

Option C: in middle

Option D: no effect of position

Correct Answer: higher ✔

Option A: oxidation

Option B: reduction

Option C: oxidation-reduction

Option D: depends on the nature of the coupled electrode

Correct Answer: depends on the nature of the coupled electrode ✔

Option A: zero

Option B: unity

Option C: constant

Option D: multiple of 1

Correct Answer: zero ✔

Option A: New electrode of same element

Option B: SHE

Option C: 1M solution of ions of respective element

Option D: 2M solution of HCI

Correct Answer: SHE ✔

Option A: electrons

Option B: anion

Option C: current

Option D: ions

Correct Answer: ions ✔

Option A: A1

Option B: Zn

Option C: Cu

Option D: Fe

Correct Answer: Cu ✔

Option A: oxidation

Option B: reduction

Option C: oxidation-reduction

Option D: all of above represent same entity

Correct Answer: reduction ✔

Option A: oxidation

Option B: reduction

Option C: redox

Option D: decomposition

Correct Answer: oxidation ✔

Option A: free electrons

Option B: ions

Option C: metals

Option D: electrodes

Correct Answer: ions ✔

Option A: Pressure increases

Option B: Dilution decreases

Option C: Dilution increases

Option D: None

Correct Answer: Dilution increases ✔

Option A: The flow of electrons takes place from copper to zinc

Option B: E0red of copper electrode is less than that of zinc electrode

Option C: Zinc acts as an anode and copper as cathode

Option D: All are correct

Correct Answer: Zinc acts as an anode and copper as cathode ✔

Option A: Lead storage battery

Option B: Silver oxide cell

Option C: Fuel cell

Option D: Ni-Cd cell

Correct Answer: Silver oxide cell ✔

Option A: Oxidation potential

Option B: Reduction potential

Option C: Redox potential

Option D: emf of cell

Correct Answer: Reduction potential ✔

CCu
B. Ag
C. Pt
D. None

Correct Answer: Pt ✔

Option A: wire

Option B: salt bridge

Option C: electric circuit

Option D: no connection exists

Correct Answer: salt bridge ✔

Option A: 40%

Option B: 25%

Option C: 30%

Option D: 50%

Correct Answer: 30% ✔

Option A: irreversible cell

Option B: reversible cell

Option C: alkaline cell

Option D: all of the above

Correct Answer: all of the above ✔

Option A: 2M

Option B: 1N

Option C: 1m

Option D: 1M

Correct Answer: 1M ✔

Option A: 1.5 volts

Option B: 2 volts

Option C: 3 volts

Option D: 1 volts

Correct Answer: 2 volts ✔

Option A: secondary cell

Option B: primary cell

Option C: voltaic cell

Option D: both A & C

Correct Answer: both A & C ✔

Option A: to form positive ions

Option B: to form negative ions

Option C: gain electrons

Option D: all are possible

Correct Answer: to form positive ions ✔

Option A: greater

Option B: lesser

Option C: sum of reduction and oxidation potentials

Option D: none

Correct Answer: greater ✔

Option A: periodic table

Option B: groups

Option C: periods

Option D: electrochemical series

Correct Answer: electrochemical series ✔

Option A: KOH

Option B: KCI

Option C: KNO3

Option D: KBr

Correct Answer: KCI ✔

Option A: 760mm of Hg

Option B: 750mm of Hg

Option C: 780mm of Hg

Option D: 800mm of Hg

Correct Answer: 760mm of Hg ✔

Option A: by addition of fresh solution

Option B: by replacing external circuit with external source of electricity

Option C: by removal of solution

Option D: by heating it

Correct Answer: by replacing external circuit with external source of electricity ✔

Option A: Daniel cell

Option B: Downs cell

Option C: Voltaic cell

Option D: Nelsons cell

Correct Answer: Voltaic cell ✔

Option A: 1 M ZnO solution

Option B: 1 M ZnSO4 solution

Option C: 1.5 M ZnSO4 solution

Option D: 0.1 M ZnSO4 solution

Correct Answer: 1 M ZnSO4 solution ✔

Option A: external electric circuit

Option B: salt bridge

Option C: movement of ions

Option D: all of the above

Correct Answer: external electric circuit ✔

Option A: spontaneous reaction

Option B: non-wpontaneous reaction

Option C: neutralization

Option D: all of above

Correct Answer: non-wpontaneous reaction ✔

Option A: neutralization

Option B: oxidation

Option C: reduction

Option D: both B & C

Correct Answer: both B & C ✔

Option A: Free electrons

Option B: Free molecules

Option C: Free ions

Option D: Atoms of Na and Cl

Correct Answer: Free ions ✔

Option A: Chemical energy is converted into electricity

Option B: Chemical energy is converted into heat

Option C: Electrical energy is converted into chemical energy

Option D: Electrical energy is converted into heat

Correct Answer: Chemical energy is converted into electricity ✔

Option A: From cathode to anode in outer circuit

Option B: From anode to cathode outside the cell

Option C: From cathode to anode inside the cell

Option D: both B & C

Correct Answer: From anode to cathode outside the cell ✔

Option A: N

Option B: Cr

Option C: S

Option D: Mn

Correct Answer: Mn ✔

Option A: H2 is deposited at cathode

Option B: Colour of the solution becomes fade

Option C: Cu is deposited at anode

Option D: All are possible

Correct Answer: Colour of the solution becomes fade ✔

Option A: concentrated

Option B: dilute

Option C: saturated solution

Option D: all of the above

Correct Answer: dilute ✔

Option A: parts of solute in 1000 parts of solvent

Option B: parts of solvent in 1000 parts of solute

Option C: parts of solute in one million parts of solution

Option D: parts of solvent in one million parts of solute

Correct Answer: parts of solute in one million parts of solution ✔

Option A: Molecules are surrounded by solvent molecules

Option B: Ions are surrounded by solvent molecules

Option C: Both ions and molecules are surrounded by solvent molecules

Option D: Both ions and molecules are surrounded by water molecules

Correct Answer: Both ions and molecules are surrounded by water molecules ✔

Option A: boiling point elevation

Option B: depression in freezing point

Option C: lowering of vapour pressure

Option D: lowering of osmotic pressure

Correct Answer: depression in freezing point ✔

Option A: a volatile solute in dilute solution

Option B: a non-electrolyte & non volatile solute in concentrated solution

Option C: a non-electrolyte & non volatile solute in concentrated solute

Option D: non volatile solute in a dilute solution

Correct Answer: non volatile solute in a dilute solution ✔

Option A: saturated solution

Option B: solubility

Option C: unsaturated solution

Option D: super saturated solution

Correct Answer: solubility ✔

Option A: ideal solution

Option B: zeotropic solution

Option C: azeotropic solution

Option D: non-ideal solution

Correct Answer: zeotropic solution ✔

Option A: will be an ideal solution

Option B: will be non-ideal solution

Option C: will show deviations from Raoults law

Option D: both b & c

Correct Answer: will be an ideal solution ✔

Option A: 0.1 M

Option B: 1 m

Option C: 1 M

Option D: 0.1 N

Correct Answer: 1 M ✔

Option A: % w/w

Option B: % w/v

Option C: % v/v

Option D: % v/w

Correct Answer: % v/v ✔

Option A: solvent

Option B: solute

Option C: phase

Option D: ion

Correct Answer: solute ✔

Option A: solute

Option B: solvent

Option C: solution

Option D: phase

Correct Answer: phase ✔

Option A: KCIO4

Option B: Na2SO4. 10H2O

Option C: K2Cr2O7

Option D: PbCl2

Correct Answer: Na2SO4. 10H2O ✔

Option A: One Molal NaCI

Option B: One molal KCI solution

Option C: One molal CaCI2

Option D: One molal urea solution

Correct Answer: One molal CaCI2 ✔

Option A: Molarity

Option B: Molality

Option C: More fraction of solvent

Option D: Mole fraction of solute

Correct Answer: Molality ✔

Option A: Molarity

Option B: Molality

Option C: Mole fraction

Option D: all

Correct Answer: Molality ✔

Option A: Na2SO4

Option B: AlCl3

Option C: CuSO4

Option D: NH4Cl

Correct Answer: Na2SO4 ✔

Option A: drying

Option B: heating

Option C: evaporation

Option D: All of the above

Correct Answer: heating ✔

Option A: 180g/dm3

Option B: 170g/dm3

Option C: 190g/dm3

Option D: 195g/dm3

Correct Answer: 180g/dm3 ✔

Option A: basic

Option B: acidic

Option C: neutral

Option D: cannot be presicted without data

Correct Answer: neutral ✔

Option A: Hydrated ions

Option B: double salts

Option C: hydrates

Option D: complexes

Correct Answer: hydrates ✔

Option A: Beckmanns method

Option B: Landsbergers method

Option C: Linds method

Option D: none of the above

Correct Answer: Landsbergers method ✔

Option A: continuous and falling solubility curve

Option B: discontinuous and falling solubility curve

Option C: continuous and rising solubility curve

Option D: discontinuous and rising solubility curve

Correct Answer: continuous and rising solubility curve ✔

Option A: zeotropic mixture

Option B: azeotropic mixture

Option C: amphoteric mixture

Option D: ideal solution

Correct Answer: zeotropic mixture ✔

Option A: equal to the mole fraction of solvent

Option B: equal to the mole fraction of solute

Option C: directly proportional to the mole fraction of solute

Option D: both B & C

Correct Answer: both B & C ✔

Option A: saturated solutions of each liquid

Option B: unsaturated solutions of each liquid

Option C: normal solution of each liquid

Option D: no layer formation takes place

Correct Answer: saturated solutions of each liquid ✔

Option A: normality

Option B: molarity

Option C: molality

Option D: mole fraction

Correct Answer: molality ✔

Option A: Super saturated solution

Option B: unsaturated solution

Option C: saturated solution

Option D: dilute solution

Correct Answer: saturated solution ✔

Option A: solution

Option B: compound

Option C: radical

Option D: ion

Correct Answer: solution ✔

Option A: Boiling point of water decrease

Option B: Boiling point of water increase

Option C: Boiling point of water remains same

Option D: None of the above

Correct Answer: Boiling point of water increase ✔

Option A: Non-electrolye solute

Option B: Non-volatile solute

Option C: Dilute solution

Option D: All of the above

Correct Answer: All of the above ✔

Option A: Opals

Option B: Dust particles in smoke

Option C: Paints

Option D: Fog

Correct Answer: Fog ✔

Option A: 1 Molar solution

Option B: 1 molal solution

Option C: 1 normal solution

Option D: all have same concentration

Correct Answer: 1 Molar solution ✔

Option A: Aug – Nov

Option B: Sep – Nov

Option C: Nov – Dec

Option D: Dec – Jan

Correct Answer: B. Sep – Nov ✔

Option A: Cl2

Option B: O3

Option C: ClO2

Option D: both B & C

Correct Answer: both B & C ✔

Option A: Ammonia

Option B: Dissolved oxygen

Option C: Carbon dixide

Option D: All

Correct Answer: Ammonia ✔

Option A: 10

Option B: 100

Option C: 10000

Option D: 100000

Correct Answer: 10 ✔

Option A: DO

Option B: BOD

Option C: COD

Option D: all of the above

Correct Answer: all of the above ✔

Option A: CO

Option B: NO2

Option C: both a & b

Option D: none of the above

Correct Answer: NO2 ✔

Option A: SO3

Option B: CO

Option C: NO

Option D: H2SO4

Correct Answer: H2SO4 ✔

Option A: dinitrogen oxide

Option B: nitrogen dioxide

Option C: chlorine gas

Option D: chlorine dioxide

Correct Answer: nitrogen dioxide ✔

Option A: volcanoes

Option B: electric sparks

Option C: combustion

Option D: all

Correct Answer: volcanoes ✔

Option A: ozone

Option B: carbonic acid

Option C: sulphuric acid

Option D: carbon dioxide

Correct Answer: carbon dioxide ✔

Option A: 5 to 200 kg

Option B: 20-200 kg

Option C: 200-400 kg

Option D: 30-400 kg

Correct Answer: 5 to 200 kg ✔

Option A: iron

Option B: fertilizer

Option C: paper

Option D: none

Correct Answer: none ✔

Option A: Biosphere

Option B: Ecosystem

Option C: Both a & b

Option D: Hydrosphere

Correct Answer: Ecosystem ✔

Option A: Nox

Option B: NO2

Option C: N2O3

Option D: NO

Correct Answer: NO ✔

Option A: 60

Option B: 70

Option C: 80

Option D: 90

Correct Answer: 80 ✔

Option A: oceans

Option B: glaciers & icecaps

Option C: fresh water lakes and ponds

Option D: All have equal distribution

Correct Answer: oceans ✔

Option A: KMnO4

Option B: Alums

Option C: Ozone

Option D: All

Correct Answer: KMnO4 ✔

Option A: chromium III

Option B: chromium IV

Option C: chromium V

Option D: chromium VI

Correct Answer: chromium IV ✔

Option A: 2

Option B: 3

Option C: 4

Option D: 5

Correct Answer: 5 ✔

Option A: alum

Option B: nickel sulphate

Option C: copper sulphate

Option D: barium sulphate

Correct Answer: alum ✔

Option A: the amount of ozone layer is greater in the region close to the equator

Option B: ozone acts as filter for UV radiations

Option C: in the equatorial region it acts as pollutant

Option D: CFCs play effective role in removing O3 in the stratosphere

Correct Answer: the amount of ozone layer is greater in the region close to the equator ✔

Option A: CFC

Option B: CO2

Option C: CO

Option D: Oxides of nitrogen

Correct Answer: CFC ✔

Option A: troposphere

Option B: stratosphere

Option C: mesosphere

Option D: photosphere

Correct Answer: stratosphere ✔

Option A: sufficient NO

Option B: sunlight

Option C: less movement of air

Option D: winds

Correct Answer: winds ✔

Option A: H2SO4

Option B: HNO3

Option C: both A and B

Option D: none

Correct Answer: both A and B ✔

Option A: NH2Cl

Option B: NHCI2

Option C: NCI2

Option D: all of the above

Correct Answer: all of the above ✔

Option A: 3 – 7 days

Option B: 2 -3 days

Option C: 3 – 7 years

Option D: 2 – 3 years

Correct Answer: C. 3 – 7 years ✔