Chemistry Basic Concept MCQs

Option A: 1s2 2s2 2p6 3s2 3p6 3d7

Option B: 1s2 2s2 2p6 3s2 3p6 4s2 4p5

Option C: 1s2 2s2 2p6 3s2 3p5 3d10

Option D: 1s2 2s2 2p6 3s2 3p6 4s23d5

Correct Answer: 1s2 2s2 2p6 3s2 3p6 4s23d5 ✔

Option A: size of Cl atoms > Cl- ion

Option B: size of Na+ ion < Na atom

Option C: size of Na atom < Na+ ion

Option D: Cl- < Na+

Correct Answer: size of Na+ ion < Na atom ✔

Option A: Ethylene iodide

Option B: Ethylene bromide

Option C: Ethylene chloride

Option D: Ethylene fluoride

Correct Answer: Ethylene bromide ✔

Option A: Aluminium

Option B: Sodium

Option C: Carbon

Option D: Sulphur

Correct Answer: Sodium ✔

Option A: H2SO4

Option B: HNO3

Option C: both A and B

Option D: none of the above

Correct Answer: both A and B ✔

Option A: First order reaction

Option B: Second order reaction

Option C: Zero order reaction

Option D: Third order reaction

Correct Answer: Zero order reaction ✔

Option A: Pd

Option B: Ni

Option C: Sn

Option D: All of the above

Correct Answer: All of the above ✔

Option A: 6

Option B: 8

Option C: 10

Option D: 4

Correct Answer: 10 ✔

Option A: dilute and concentrated

Option B: dilute and saturated

Option C: saturated and unsaturated

Option D: saturated and super saturated

Correct Answer: dilute and concentrated ✔

Option A: moles dm-3

Option B: moles kg-1

Option C: gram dm-3

Option D: none

Correct Answer: moles kg-1 ✔

Option A: 4.0 x 10-8

Option B: 3.2 x 10-11

Option C: 2.0 x 10-8

Option D: 4.0 x 10-12

Correct Answer: 3.2 x 10-11 ✔

Option A: Kc is constant at given temperature

Option B: Kc is unaffected by change in concentration of reactants or products

Option C: Kc indicates the extent of reaction but not about the rate of reaction.

Option D: All of the above

Correct Answer: All of the above ✔

Option A: CCI4

Option B: CO2

Option C: BF3

Option D: none of the above

Correct Answer: none of the above ✔

Option A: B

Option B: C

Option C: N

Option D: O

Correct Answer: N ✔

Option A: Fe2O3

Option B: V2O5

Option C: SO3

Option D: Ag2O

Correct Answer: V2O5 ✔

Option A: 6

Option B: 4

Option C: 3

Option D: 2

Correct Answer: 2 ✔

Option A: pink

Option B: black

Option C: yellow

Option D: brick red

Correct Answer: brick red ✔

Option A: aluminium can be recycled

Option B: aluminium has very low density

Option C: aluminium is the most abundant metal in the earth crust

Option D: aluminium is resistant to corrosion by organic acids.

Correct Answer: aluminium is resistant to corrosion by organic acids. ✔

Option A: Average kinetic energy of molecules

Option B: Vibrational kinetic energy

Option C: Translational kinetic energy

Option D: None of the above

Correct Answer: Vibrational kinetic energy ✔

Option A: Similar physical properties

Option B: Similar chemical properties

Option C: Both A and b

Option D: None

Correct Answer: None ✔

Option A: Enzymes

Option B: Nitrogenous bases

Option C: Carbohydrates

Option D: Lipids

Correct Answer: Nitrogenous bases ✔

Option A: Carbon

Option B: Arsenic

Option C: Nitrogen

Option D: Sulphur

Correct Answer: Nitrogen ✔

Option A: fats

Option B: resins

Option C: iodine

Option D: all the above

Correct Answer: all the above ✔

Option A: 0?C

Option B: 273.16K

Option C: ?273.16 K

Option D: ?273.16?C

Correct Answer: ?273.16?C ✔

Option A: phenol is unsaturated

Option B: 2-bromophenol is insoluble in water

Option C: a hydroxy group makes the benzene ring more susceptible to electrophilic attack

Option D: acid-base reaction

Correct Answer: a hydroxy group makes the benzene ring more susceptible to electrophilic attack ✔

Option A: alkaline aquenous iodine

Option B: aqueous bromine

Option C: Fehling solution

Option D: aqueous NaOH

Correct Answer: alkaline aquenous iodine ✔

Option A: n2a/v correct for the intermolecular forces.

Option B: nb correct for the volume occupied by gas molecules.

Option C: at high densities the equation reduces to the ideal gas law

Option D: all of the above statements are correct.

Correct Answer: at high densities the equation reduces to the ideal gas law ✔

Option A: Quantum structure

Option B: Secondary structure

Option C: Tertiary structure

Option D: Primary structure

Correct Answer: Secondary structure ✔

Option A: Pb3 O4

Option B: 2Pb CO3 – Pb (OH)2

Option C: Pb Cr O4 – Pb (OH)2

Option D: Pb2O

Correct Answer: Pb3 O4 ✔

Option A: IIIA group

Option B: IVA group

Option C: VA group

Option D: VIA group

Correct Answer: IVA group ✔

Option A: Si

Option B: As

Option C: Te

Option D: None of the above

Correct Answer: None of the above ✔

Option A: Ag

Option B: A

Option C: Au

Option D: Cu

Correct Answer: A ✔

Option A: endothermic

Option B: exothermic

Option C: unpredictable

Option D: same

Correct Answer: exothermic ✔

Option A: A

Option B: Ag

Option C: Both

Option D: Neither

Correct Answer: A ✔

Option A: constitutive property

Option B: additive property

Option C: colligative property

Option D: intrinsic property

Correct Answer: colligative property ✔

Option A: 1.008 x 10-3

Option B: 5.5 x 10-4

Option C: 1.84 x 10-4

Option D: 1.673 x 10-3

Correct Answer: 5.5 x 10-4 ✔

Option A: 1 x 10-1

Option B: 1 x 10-14

Option C: 1 x 10-7

Option D: 1

Correct Answer: 1 ✔

Option A: whole amount of reactant does not change into product

Option B: chemical equilibrium is established

Option C: a catalyst changes the direction of reaction

Option D: rate of forward reaction decreases as reaction proceeds

Correct Answer: a catalyst changes the direction of reaction ✔

Option A: VSEPR

Option B: VBT

Option C: MOT

Option D: none of the above

Correct Answer: MOT ✔

Option A: Be+2H2O?Be (OH)2+H2

Option B: Be+H2O?Be (OH)2+H2

Option C: Be+H2O?[Be (OH)4]+2+H2

Option D: no reaction

Correct Answer: no reaction ✔

Option A: copper

Option B: ice

Option C: diamond

Option D: graphite

Correct Answer: copper ✔

Option A: sodium

Option B: diamond

Option C: graphite

Option D: magnesium

Correct Answer: diamond ✔

Option A: Teflon

Option B: asbestos

Option C: saran

Option D: acrylic

Correct Answer: asbestos ✔

Option A: Electrons fill orbitals with parallel spins until all the orbitals of the same energy are half filled then they go into sub-shells with anti-parallel (opposite) spin.

Option B: The electrons in the same atom cannot have the same four quantum numbers

Option C: There is maximum of two electrons is an orbital.

Option D: None

Correct Answer: Electrons fill orbitals with parallel spins until all the orbitals of the same energy are half filled then they go into sub-shells with anti-parallel (opposite) spin. ✔

Option A: 1

Option B: 2

Option C: 3

Option D: 4

Correct Answer: 3 ✔

Option A: 0.33 nm

Option B: 0.34 nm

Option C: 0.35 nm

Option D: 0.36 nm

Correct Answer: 0.33 nm ✔

Option A: they cast shadow

Option B: they possess momentum

Option C: they are negatively charged

Option D: all of the above

Correct Answer: they possess momentum ✔

Option A: Analytical balance

Option B: Guoys balance

Option C: Electrical balance

Option D: Single beam balance

Correct Answer: Guoys balance ✔

Option A: Polar solvent

Option B: Non polar solvent

Option C: Fused metal

Option D: None

Correct Answer: Fused metal ✔

Option A: 2

Option B: 3

Option C: 4

Option D: 5

Correct Answer: 4 ✔

Option A: Plastic

Option B: Glass

Option C: Rubber

Option D: None of the above

Correct Answer: None of the above ✔

Option A: 12% alcohol

Option B: 90% alcohol

Option C: 95% alcohol

Option D: 100% alcohol

Correct Answer: 95% alcohol ✔

Option A: molecules become more disordered.

Option B: K.E of the molecules decreases

Option C: intermolecular forces become weaker.

Option D: molecules move more frequently.

Correct Answer: K.E of the molecules decreases ✔

Option A: 20cm3/min

Option B: 40cm3/min

Option C: 160cm3/min

Option D: 2.5cm3/min

Correct Answer: 40cm3/min ✔

Option A: a solvent

Option B: an anti freezing agent

Option C: a substitute for petrol

Option D: for denaturing of ethyl alcohol

Correct Answer: a substitute for petrol ✔

Option A: pressure

Option B: volume

Option C: moles

Option D: density

Correct Answer: density ✔

Option A: 5

Option B: 4

Option C: 3

Option D: 2

Correct Answer: 5 ✔

Option A: 0.5

Option B: 1

Option C: 1.5

Option D: 2

Correct Answer: 2 ✔

Option A: neutrons

Option B: protons and electrons

Option C: protons

Option D: protons and neutrons

Correct Answer: protons ✔

Option A: Combustion method

Option B: Dumas method

Option C: Kjeldahls method

Option D: All of the above methods are for different purposes

Correct Answer: Combustion method ✔

Option A: properties which depend upon mass

Option B: arrangement of electrons in orbitals

Option C: chemical properties

Option D: all of the above

Correct Answer: properties which depend upon mass ✔

Option A: Empirical formula

Option B: Molecular mass

Option C: Molecular formula

Option D: Formula mass

Correct Answer: Empirical formula ✔

Option A: identification of elements

Option B: estimation of amounts of elements

Option C: molar ration of elements

Option D: molar volume of elements

Correct Answer: identification of elements ✔

Option A: they possess different mass number

Option B: they possess different physical properties

Option C: they possess same chemical properties

Option D: they possess different position in the periodic table

Correct Answer: they possess different position in the periodic table ✔

Option A: 1.008 mg

Option B: 0.184 mg

Option C: 0.054 mg

Option D: 5.4 mg

Correct Answer: 0.054 mg ✔

Option A: arsenic

Option B: uranium

Option C: iodine

Option D: nickel

Correct Answer: uranium ✔

Option A: relative atomic mass

Option B: mass number

Option C: atomic weight

Option D: relative isotopic mass

Correct Answer: relative atomic mass ✔

Option A: Atomicity

Option B: Shape of molecule

Option C: Both A and B

Option D: Difficult to predict

Correct Answer: Both A and B ✔

Option A: volume of particles

Option B: number of particles

Option C: mass of particles

Option D: All of the above

Correct Answer: All of the above ✔

Option A: Gas

Option B: Liquid

Option C: Volatile solid

Option D: All

Correct Answer: Gas ✔

Option A: Uni-negative

Option B: Uni-positive

Option C: Di-negative

Option D: Di-positive

Correct Answer: Uni-negative ✔

Option A: Same number of neutrons

Option B: Same mass number

Option C: Same physical properties

Option D: Same chemical properties

Correct Answer: Same chemical properties ✔

Option A: High energy electron beam

Option B: ? – particle

Option C: X-rays

Option D: All of the above

Correct Answer: All of the above ✔

Option A: H+ H H-

Option B: Li+ Na+ K+

Option C: C1- Br- I

Option D: F- Ne Na+

Correct Answer: F- Ne Na+ ✔

Option A: 1.6 x 10-27 kg

Option B: 1.6 x 10-24 kg

Option C: 1.6 x 10-26 kg

Option D: 1.6 x 10-28 kg

Correct Answer: 1.6 x 10-27 kg ✔

Option A: Mass number

Option B: Atomic mass

Option C: Relative abundance

Option D: all of the above

Correct Answer: Relative abundance ✔

Option A: NaCl

Option B: H2O

Option C: CCI4

Option D: It can be applied to all mentioned above

Correct Answer: It can be applied to all mentioned above ✔

Option A: lighter

Option B: intermediate

Option C: heavier

Option D: are collected at same time

Correct Answer: lighter ✔

Option A: different number of protons

Option B: same number of neutrons

Option C: different number of neutrons

Option D: same mass number (nucleon number)

Correct Answer: different number of neutrons ✔

Option A: sand

Option B: haemoglobin

Option C: diamond

Option D: maltose

Correct Answer: maltose ✔

Option A: Mass of an atom itself is in fraction

Option B: Atomic masses are average masses of isobars

Option C: Atmoic masses are average masses of isotopes proportional to their relative abundance

Option D: Atmoic masses are average masses of isotopes

Correct Answer: Atmoic masses are average masses of isotopes proportional to their relative abundance ✔

Option A: 80%

Option B: 30%

Option C: 40%

Option D: 20%

Correct Answer: 40% ✔

Option A: 154

Option B: 280

Option C: 86

Option D: 300

Correct Answer: 86 ✔

Option A: 0.25

Option B: 0.5

Option C: 0.75

Option D: 1

Correct Answer: 0.5 ✔

Option A: 2.24 dm3

Option B: 22.4 dm3

Option C: 1.12 dm3

Option D: 112 dm3

Correct Answer: 2.24 dm3 ✔

Option A: oxygen

Option B: carbon

Option C: tin

Option D: chlorine

Correct Answer: tin ✔

Option A: 0.18 mole

Option B: 0.27 mole

Option C: 0.24 mole

Option D: 0.09 mole

Correct Answer: 0.18 mole ✔

Option A: formula unit

Option B: empirical formula

Option C: molecular formula

Option D: formula mass

Correct Answer: molecular formula ✔

Option A: 280

Option B: 300

Option C: 154

Option D: 54

Correct Answer: 154 ✔

Option A: 6.022 x 1023 atoms of oxygen

Option B: 22-gram electrons

Option C: 6.022 x 1023 atms of carbon

Option D: both B. & C.

Correct Answer: D. both B. & C. ✔

Option A: Isotopes with odd atomic number are abundant

Option B: Isotopes with odd atomic number and even mass number are abundant

Option C: Isotopes with even atomic number and even mass number are abundant

Option D: Isotopes with even atomic number and odd mass no are abundant

Correct Answer: Isotopes with even atomic number and even mass number are abundant ✔

Option A: 1-mole molecules of water

Option B: 1-gram molecule of water

Option C: 3-gram atoms

Option D: all

Correct Answer: all ✔

Option A: CH2 C12

Option B: CH3C1

Option C: CC14

Option D: CHCL3

Correct Answer: CHCL3 ✔

Option A: Relative abundance

Option B: Average mass of element

Option C: Number of isotopes

Option D: Relative isotopic mass

Correct Answer: Number of isotopes ✔

Option A: Atomic number

Option B: Relative abundance

Option C: Electronic configuration

Option D: All of the above

Correct Answer: Relative abundance ✔

Option A: 0.2m

Option B: 0.2mm

Option C: 0.2nm

Option D: 0.2pm

Correct Answer: 0.2nm ✔