JEE Chemistry The Solid State MCQs Set A

• a) Intermolecular forces are weak
• b) Intermolecular distances are short
• c) Constituent particles have fixed positions
• d) Solids oscillate about their mean positions

Answer: Intermolecular forces are weak

Question: Most crystals show good cleavage because their atoms, ions or molecules are

• a) arranged in planes
• b) spherically symmetrical
• c) strongly bonded together
• d) weakly bonded together

Answer: arranged in planes

Question: “Crystalline solids are anisotropic in nature. What is the meaning of anisotropic in the given statement?

• a) Different values of some of physical properties are shown when measured along different directions in the same crystals
• b) An irregular arrangement of particles over the entire crystal
• c) Same values of some of physical properties are shown when measured along different directions in the same crystals
• d) A regular pattern of arrangement of particles which repeats itself periodically over the entire crystal

Answer: Different values of some of physical properties are shown when measured along different directions in the same crystals

Question: A crystalline solid

• a) changes abruptly from solid to liquid when heated
• b) has no definite melting point
• c) undergoes deformation of its geometry easily
• d) has an irregular 3-dimensional arrangements

Answer: changes abruptly from solid to liquid when heated

Question: Which of the following is not a characteristic of a crystalline solid ?

• a) Isotropic nature
• b) Definite and characteristic heat of fusion
• c) A regular periodically repeated pattern of arrangement of constituent particles in the entire crystal.
• d) A true solid

Answer:  Isotropic nature

Question: Which of the following is not a crystalline solid?

• a) Glass
• b) KCl
• c) CsCl
• d) Rhombic S

Answer: Glass

Question: Which of the following statements about amorphous solids is incorrect ?

• a) They are anisotropic
• b) They melt over a range of temperature
• c) There is no orderly arrangement of particles
• d) They are rigid and incompressible

Answer: They are anisotropic

Question: Which of the following is not a crystalline solid?

• a) Glass
• b) KCl
• c) CsCl
• d) Rhombic S

Answer: Glass

Question: Which of the following is an amorphous solid ?

• a) Quartz glass (SiO₂)
• b) Silicon carbide (SiC)
• c) Graphite (C)
• d) Chrome alum

Answer:  Quartz glass (SiO₂)

Question: Which of the following statement is not true about amorphous solids ?

• a) They are anisotropic in nature
• b) Amorphous solids can be moulded by heating
• c) They may become crystalline on keeping for long time
• d) On heating they may become crystalline at certain temperature

Answer: They are anisotropic in nature

Question: The sharp melting point of crystalline solids is due to _____.

• a) a regular arrangement of constituent particles observed over a long distance in the crystal lattice
• b) a regular arrangement of constituent particles observed over a short distance in the crystal lattice
• c) same arrangement of constituent particles in different directions
• d) different arrangement of constituent particles in different directions

Answer: a regular arrangement of constituent particles observed over a long distance in the crystal lattice

Question: Why some glass objects from ancient civilisations are found to become milky in appearance?

• a) Glass is amorphous but on heating it become crystalline at some temperature
• b) Glass is a crystalline solid, milky appearance is due to its crystalline nature
• c) Because of reaction of glass with impurities present in the atmosphere
• d) None of these

Answer: Glass is amorphous but on heating it become crystalline at some temperature

Question: Which of the following amorphous solid is used as photovoltaic material for conversion of sunlight into electricity?

• a) Silicon
• b) Quartz glass
• c) Quartz
• d) None of these

Answer: Silicon

Question: Solid CH₄ is

• a) molecular solid
• b) ionic solid
• c) covalent solid
• d) does not exist

Answer: molecular solid

Question: An example of a covalent crystalline solid is

• a) NaF
• b) Si
• c) Al
• d) Ar

Answer:  NaF

Question: Among solids, the highest melting point is exhibited by

• a) Covalent solids
• b) Pseudo solids
• c) Ionic solids
• d) Molecular solids

Answer: Covalent solids

Question: Which of the following exists as covalent crystals in the solid state ?

• a) Silicon
• b) Phosphorus
• c) Iodine
• d) Sulphur

Answer: Silicon

Question: The major binding force of diamond, silicon and quartz is

• a) covalent bond force
• b) electrostatic force
• c) electrical attraction
• d) non-covalent bond force

Answer:  covalent bond force

Question: In graphite electrons are

• a) spread out between the sheets
• b) localised on each carbon atom
• c) localised on every third carbon atom
• d) present in antibonding orbital

Answer: spread out between the sheets

Question: Which one of the following forms a molecular solid when solidified?

• a) Methane
• b) Calcium fluoride
• c) Silicon carbide
• d) Rock salt

Answer:  Methane

More Questions................................

Question:  Which of the following is a network solid ?

• a) Diamond
• b) SO₂ (solid)
• c) I₂
• d) H₂O (Ice)

Answer: Diamond

Question: Which of the following solids is not an electrical conductor?

• a) I₂ (s)
• b) Mg (s)
• c) TiO (s)
• d) None of these

Answer: I₂ (s)

Question: Iodine molecules are held in the crystals lattice by

• a) london forces
• b) dipole-dipole interactions
• c) covalent bonds
• d) coulombic forces

Answer: london forces

Question: Which of the following is not the characteristic of ionic solids?

• a) Very low value of electrical conductivity in the molten state
• b) Brittle nature
• c) Very strong forces of interactions
• d) Anisotropic nature

Answer: Very low value of electrical conductivity in the molten state

Question: Graphite is a good conductor of electricity due to the presence of ______.

• a) free valence electrons
• b) anions
• c) lone pair of electrons
• d) cations

Answer: free valence electrons

Question: Graphite cannot be classified as

• a) ionic solid
• b) network solid
• c) conducting solid
• d) covalent solid

Answer: ionic solid

Question: Which of the following cannot be regarded as molecular solid ?

(i) SiC (Silicon carbide) (ii) AlN
(iii) Diamond                (iv) I₂

• a) (i), (ii) and (iii)
• b) (iv)
• c) (ii) and (iii)
• d) (ii) and (iv)

Answer: (i), (ii) and (iii)

Question: Crystals can be classified into basic crystal units, equal to

• a) 7
• b) 14
• c) 4
• d) 2

Answer: 7

Question: How many three dimensional crystal lattice are possible?

• a) 14
• b) 20
• c) 7
• d) 10

Answer:  14

Question: In face-centred cubic lattice, a unit cell is shared equally by how many unit cells

• a) 2
• b) 6
• c) 4
• d) 8

Answer: 2

Question: The number of atoms contained in a fcc unit cell of a monoatomic substance is

• a) 4
• b) 1
• c) 2
• d) 6

Answer: 4

Question: In face-centred cubic lattice, a unit cell is shared equally by how many unit cells

• a) 6
• b) 2
• c) 4
• d) 8

Answer: 6

Question: The number of atoms per unit cell of bcc structure is

• a) 2
• b) 6
• c) 1
• d) 4

Answer:  2

Question: When molten zinc is converted into solid state, it acquires hcp structure. The number of nearest neighbours of Zn will be

• a) 12
• b) 4
• c) 6
• d) 8

Answer: 12

Question: Hexagonal close packed arrangement of ions is described as

• a) ABABA
• b) ABC ABA
• c) ABC ABC
• d) ABBAB

Answer: ABABA

Question: In which of the following crystals alternate tetrahedral voids are occupied?

• a) ZnS
• b) Na₂O
• c) NaCl
• d) CaF₂

Answer: ZnS

Question: Which of the following statements is not true about classical smog?

• a) Its main components are produced by the action of sunlight on emissions of automobiles and factories.
• b) Produced in cold and humid climate
• c) It contains compounds of reducing nature
• d) It contains smoke fog and sulphur dioxide

Answer: Its main components are produced by the action of sunlight on emissions of automobiles and factories.

Question:  Which of the following statements about photochemical smog is wrong?

• a) It has low concentration of oxidising agent
• b) It has high concentration of oxidising agents
• c) It can be controlled by controlling the release of NO₂, hydrocarbons ozone, etc
• d) Plantation of some plants like pinus helps in controlling photochemical smog.

Answer: It has low concentration of oxidising agent

Question: Select the process that does not add particulate materials to air.

• a) Use of air conditioner
• b) Burning of fosssil fuels
• c) Paper industry
• d) Incomplete combustion of coal

Answer: Use of air conditioner

Question: The biggest particulate matter is

• a) Fly ash
• b) Soot
• c) HNO₃ droplets
• d) H₂SO₄ droplets

Answer: Fly ash

Question: The viable particulate among the following is

• a) Algae
• b) Mist
• c) Fumes
• d) Smoke

Answer:  Algae

Question: The aromatic compounds present as particulates are

• a) Polycyclic aromatic hydrocarbons
• b) Benzene
• c) Toluene
• d) Nitrobenzene

Answer:  Polycyclic aromatic hydrocarbons

Question: Which of the following can control the photochemical smog ?

(A) Use of catalytic converters in automobiles.
(B) Plantation of trees like pinus, pyrus vitis etc.
(C) Using less sulphur containing fossil fuels

• a) A and B
• b) A and C
• c) B
• d) A, B and C

Answer: A and B

Question: The gas responsible for ozone depletion

• a) NO and freons
• b) CO₂
• c) SO₂
• d) CO

Answer: NO and freons

Question: Identify the incorrect statement from the following

• a) Ozone absorbs infrared radiation
• b) Depletion of ozone layer is because of its chemical reactions with chlorofluoro alkanes
• c) Ozone absorbs the intense ultraviolet radiation of the sun.
• d) None of these

Answer:  Ozone absorbs infrared radiation

Question: Which of the following chemical, harmful to ozone, is released by chlorofluoro carbon?

• a) Chlorine
• b) Sulphur dioxide
• c) Fluorine
• d) Nitrogen dioxide

Answer: Chlorine

Question: In Antarctica ozone depletion is due to the formation of following compound

• a) acrolein
• b) SO₂ and SO₃
• c) peroxyacetyl nitrate
• d) None of these

Answer:  acrolein

Question: Depletion of ozone layer causes

• a) skin cancer
• b) blood cancer
• c) breast cancer
• d) lung cancer

Answer: skin cancer

Question: Select the one that has an adverse effect on ozone layer

• a) Chlorofluorocarbons
• b) Dust particles
• c) Carbon dioxide
• d) Soil

Answer:  Chlorofluorocarbons

Question: Ozone hole refers to

• a) Reduction in thickness of ozone layer in stratsophere
• b) Reduction in thickness of ozone layer in troposphere
• c) Hole in ozone layer
• d) Increase in concentration of ozone

Answer: Reduction in thickness of ozone layer in stratsophere

Question: Which of the following statements is wrong?

• a) Ozone is not responsible for green house effect.
• b) Ozone can oxidise sulphur dioxide present in the atmosphere to sulphur trioxide
• c) Ozone hole is thinning of ozone layer present in stratosphere
• d) Ozone is produced in upper stratosphere by the action of UV rays on oxygen

Answer:  Ozone is not responsible for green house effect.

Question: Which of the following statements is correct

• a) Ozone hole is thinning of ozone layer of stratosphere at some places
• b) Ozone hole means vanishing of ozone layer around the earth completely
• c) Ozone hole is a hole formed in the troposphere from which ozone oozes out
• d) Ozone hole is a hole formed in stratosphere from which ozone oozes out

Answer: Ozone hole is thinning of ozone layer of stratosphere at some places

Question: Ozone is an important constituent of stratosphere because it

• a) Absorbs ultraviolet radiation which is harmful to human life
• b) Removes poisonous gases of the atmosphere by reacting with them
• c) Prevents the formation of smog over large cities
• d) Destroys bacteria which are harmful to human life

Answer:  Absorbs ultraviolet radiation which is harmful to human life

Question: The gas(es) not responsible for ozone depletion

• a) Both
• b) SO₂
• c) CO₂
• d) None of these

Answer: Both

Question: What is the concentration of dissolved oxygen in cold water ?

• a) 10 ppm
• b) 100 ppm
• c) 5 ppm
• d) 200, 000 ppm

Answer:  10 ppm

Question: Water pollution is caused by

• a) pesticides
• b) SO₂
• c) CO₂
• d) O₂

Answer: pesticides

Question: Minamata disease of Japan is due to pollution of

• a) Mercury
• b) Lead
• c) Aresenic
• d) Cynide

Answer: Mercury

Question: The high amount of E. coli in water is the indicator of

• a) sewage pollution
• b) presence of chlorine in water
• c) industrial pollution
• d) None of these

Answer: sewage pollution

Question: A lake with an inflow of domestic sewage rich in organic waste may result in

• a) death of fish due to lack of oxygen
• b) increased population of aquatic food web organisms
• c) an increase production of fish due to lot of nutrients
• d) drying of the lake very soon due to algal bloom

Answer: death of fish due to lack of oxygen

Question: Which of the following does not occur when the sewage is discharged into water ?

• a) Increase in O₂
• b) Cyanophycean blooms occur
• c) Eutrophication
• d) None of these

Answer:  Increase in O₂

Question: Which of the following metal is a water pollutant and causes sterility in human being

• a) Mn
• b) Hg
• c) As
• d) Mg

Answer: Mn

Question: Sewage mostly constitutes

• a) Biodegradable pollutants
• b) Effluents
• c) Air pollutants
• d) Non-biodegradable pollutants

Answer: Biodegradable pollutants

Question: Sewage containing organic waste should not be disposed in water bodies because it causes major water pollution. Fishes in such a polluted water die because of

• a) decrease in the amount of dissolved oxygen in water
• b) clogging of gills by mud
• c) increase in the amount of dissolved oxygen
• d) large number of mosquitoes

Answer:  decrease in the amount of dissolved oxygen in water

Question: Sewage water is purified by

• a) microoganisms
• b) fishes
• c) light
• d) aquatic plants

Answer:  microoganisms

Question: Water is often treated with chlorine to

• a) kill germs
• b) increase oxygen content
• c) remove hardness
• d) remove suspended particles

Answer: kill germs

Question: Which causes death of fish in water bodies polluted by sewage?

• a) Decrease in D.O.
• b) Pathogens
• c) Foul smell
• d) Herbicides

Answer: Decrease in D.O.

Question: B.O.D. test or biochemical oxygen demand test is made for measuring

• a) water pollution
• b) soil pollution
• c) air pollution
• d) noise pollution

Answer: water pollution

Question: Brewery and sugar factory waste alters the quality of a water body by increasing

• a) COD and BOD
• b) turbidity
• c) temperature
• d) pH

Answer: COD and BOD

Question: Which one of the following statement is not true ?

• a) Concentration of DO below 6 ppm is good for the growth of fish
• b) pH of drinking water should be between 5.5 – 9.5.
• c) Clean water would have a BOD value of less than 5 ppm.
• d) Oxides of sulphur, nitrogen and carbon are the most widespread air pollutant

Answer: Concentration of DO below 6 ppm is good for the growth of fish

Question: Limit of BOD prescribed by Central pollution Control Board for the discharge of industrial and municipal waste waters into natural surface waters, is

• a) < 30 ppm
• b) < 10 ppm
• c) < 100 ppm
• d) < 3.0 ppm

Answer: < 30 ppm

Question:  Biochemical Oxygen Demand, (BOD) is a measure of organic material present in water. BOD value less than 5 ppm indicates a water sample to be

• a) rich in dissolved oxygen
• b) poor in dissolved oxygen
• c) highly polluted
• d) not suitable for aquatic life

Answer: rich in dissolved oxygen

Question: Phosphate fertilizers when added to water leads to

• a) Increased growth of decomposers
• b) Reduced algal growth
• c) Increased algal growth
• d) Nutrient enrichment (eutrophication)

Answer: Increased growth of decomposers

Question: BOD of pond is connected with

• a) None of these
• b) Microbes
• c) Organic matter
• d) Microbes & organic matter

Answer: None of these

Question: The maximum prescribed concentration of cadmium in drinking water in ppm is

• a) 0.005
• b) 3
• c) 0.05
• d) 2

Answer:  0.005

Question: Excess nitrate in drinking water can cause

• a) methemoglobinemia
• b) liver damage
• c) kidney damage
• d) laxative effect

Answer:  methemoglobinemia