Chemistry MCQ (Multiple Choice Questions) - SchoolingAxis

Chemistry MCQ (Multiple Choice Questions)

 Que- Which group contains elements that exist as monoatomic molecule? 

a. 1  

b. 2  

c. 14  

d. 18 

Answer- 18

Que- The element having electronic configuration [kr] 4d10, 4f14,5s2,5p6,5d1,6s2 belongs to __________? 

a. S-Block  

b. P-Block  

c. d-Block  

d. f-Block 

Answer- f-Block

Que- Which one of the following is a bridge element? 

a. Be  

b. Cl  

c. K  

d. P 

Answer- Be

Que- Which of the following aqueous solutions would have the highest boiling point? 

a. 0.20 m glucose  

b. 0.20 m NaCl  

c. 0.15 m CaCl2  

d. 0.25 m sucrose 

Answer- 0.15 m CaCl2

Que- The mass of 3.2 moles of ammonia (NH3) gas? 

a. 53.4 grams  

b. 54.4 grams  

c. 55.4 grams  

d. 56.4 grams 

Answer- 54.4 grams

Que- How many moles are in 22.2 grams of Calcium chloride, CaCl2? 

a. 0.2 moles  

b. 0.3 moles  

c. 0.4 moles  

d. 0.5 moles 

Answer- 0.2 moles

Que- What is the mass percent of silver in silver notrate, AgNO3? 

a. 64.5%  

b. 65.6%  

c. 63.5%  

d. 61.5% 

Answer- 63.5%

Que- A sample of an iron and oxygen ore has a mass of 35.8 grams. The iron in the compound has a mass of 27.9 grams. What is the percent iron in the ore? 

a. 74% Fe  

b. 75% Fe  

c. 77% Fe  

d. 78% Fe 

Answer- 78% Fe

Que- A compound is determined to have an emperical formula of C2H6O and a molar mass of 138 g/mole. What is the molecular formula? 

a. C2H6O  

b. C6H18O3  

c. C6H12O6  

d. C2H5O 

Answer- C6H18O3

Que- A substance is analyzed and found to have an emperical formula of CH2 and a molar mass of 56g/mole. What is the molecular formula of the compound? 

a. C2H4  

b. C3H6  

c. C4H8  

d. C5H10 

Answer- C4H8

Que- The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in__________? 

a. 1.8 gram of H2O  

b. 12 moles of KMnO4  

c. 0.6N H2SO4  

d. 4.6 gram of C2H5OH 

Answer- 12 moles of KMnO4

Que- The molecular formula for cholesterol is C27 H46 O. What are the degrees of unsaturation for this compound? 

a. 5  

b. 6  

c. 7  

d. 8 

Answer- 5

Que- What is the density ofargon gas at a temperature of 30°C and a pressure of 1.05 atm? 

a. 1.65 g/L  

b. 1.67 g/L  

c. 1.68 g/L  

d. None of the above 

Answer- 1.68 g/L

Que- The formula C6H5-CO-CH3 represents_______ ? 

a. Acetone  

b. Acetic acid  

c. Acetophenone  

d. Phenyl acetate 

Answer- Acetophenone

Que- Poisonous gas present in the exhaust fumes of a jet plane is__________? 

a. Flurocarbon  

b. Carbon monoxide  

c. Methane  

d. C2H2 

Answer- Carbon monoxide

Que- The O-O linkage is present in__________? 

a. H2S2O3  

b. H2SO8  

c. H2S4O6  

d. H2 S2 O6 

Answer- H2SO8

Que- The number of lone pairs in XeOF4 is_________? 

a. O  

b. 1  

c. 2  

d. 3 

Answer- 1

Que- Argon gas was discovered by_______? 

a. Rayleigh  

b. Ramsay  

c. Lockerey  

d. Dalton 

Answer- Ramsay

Que- SO2 reacts with Cl in sunlight to form__________? 

a. Sulphur dioxide  

b. Sulphuryl chloride  

c. Suphanyl chloride  

d. All of the above 

Answer- Sulphuryl chloride

Que- Oxidation state +1 for phosphorous is found in___________? 

a. H3PO3  

b. H3PO4  

c. H3PO2  

d. H2P2O7 

Answer- H3PO2

Que- Electric bulb filament is made of__________? 

a. Copper  

b. Aluminum  

c. Lead  

d. Tungsten 

Answer- Tungsten

Que- Tetraethyl lead is used as______? 

a. Pain Killer  

b. Fire Extinguisher  

c. Mosquito Repellent  

d. Petrol Additive 

Answer- Petrol Additive

Que- The average salinity of sea water is________? 

a. 3%  

b. 3.5%  

c. 2.5%  

d. 2% 

Answer- 3.5%

Que- The chemical (Ethyl Mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of:_______? 

a. Bromine  

b. Fluorine  

c. Chlorine  

d. Sulphur 

Answer- Sulphur

Que- Marsh gas is_______? 

a. Nitrogen  

b. Ethane  

c. Methane  

d. Hydrogen 

Answer- Methane

Que- Potassium Permanganate is used for purifying drinking water, because_________? 

a. It is a sterilising agent.  

b. It dissolves the impurities of water.  

c. It is a reducing agent.  

d. It is an oxidising agent. 

Answer- It is an oxidising agent.

Que- Find the PH of a 0.001 M solution of Nitric acid HNO3? 

a. 2  

b. 3  

c. 4  

d. 5 

Answer- 3

Que- Which set of quantum numbers is not allowed? 

a. n=2,l=1,m1=0,ms=+1/2  

b. n=2,l=1,m1=-1,ms=+1/2  

c. n=2,l=0,m1=0,ms=-1/2  

d. n=2,l=2,m1=1,ms=-1/2 

Answer- n=2,l=2,m1=1,ms=-1/2

Que- The purpose of Smelting an ore is to________? 

a. Reduce it  

b. Oxidize it  

c. Obtain an alloy  

d. Separate volatile impurities 

Answer- Reduce it

Que- Which Oxide of Manganese is amphoteric? 

a. MnO2  

b. Mn2O3  

c. Mn2O7  

d. MnO 

Answer- MnO2

Que- A process used for the Concentration of Ore is________? 

a. Roasting  

b. Forth flotation  

c. Electrolysis  

d. Distillation 

Answer- Forth flotation

Que- Which metal is used as a reducing agent in Smelting______? 

a. C  

b. Zn  

c. Al  

d. Cu 

Answer- C

Que- Parke’s process is used in the extraction of________? 

a. Iron  

b. Sodium  

c. Silver  

d. Zinc 

Answer- Silver

Que- In melting of iron, which of the following reactions takes place in Bladt Furnace at 400°C- 600°C________? 

a. CaO+ SiO2——> CaSiO3  

b. 2FeS+3O2——–> 2Fe+ SO2  

c. FeSiO3———> FeSiO3  

d. Fe2O3+ 3CO——–> 2Fe+ 3CO2 

Answer- Fe2O3+ 3CO——–> 2Fe+ 3CO2

Que- Gypsum is______? 

a. CaSO4  

b. CaSO4.1/2H2O  

c. CaSO4,2H2O  

d. CaSO4.3H2O 

Answer- CaSO4,2H2O

Que- Basicity of orthophosphoric acid is________? 

a. 2  

b. 3  

c. 4  

d. 5 

Answer- 3

Que- Ce58 is a member of__________? 

a. S-block  

b. P-block  

c. d-block  

d. f-block 

Answer- f-block

Que- Electronic Configuration of Calcium (Ca) atom may be written as________? 

a. Ne, 4p2  

b. Ar, 4s2  

c. Ne, 4s2  

d. Kr,4p2 

Answer- Ar, 4s2

Que- A 10 volume solution of H2O2 means_______? 

a. 10 grams of H2O2 solution liberate 10 mL of O2 at STO  

b. 10 gram equivalents of H2O2 liberates 10 mL of O2 at STP  

c. 10 litres of H2O2 liberates 19 mL of O2 at STP  

d. 1mL of solution of H2O2 liberates 10 mL of O2 at STP 

Answer- 1mL of solution of H2O2 liberates 10 mL of O2 at STP

Que- The volume strength of 1.5 N H2O2 solution is_______? 

a. 4.8  

b. 5.2  

c. 8.8  

d. 8.4 

Answer- 8.4

Que- The structure of H2O2 is_______? 

a. Planar  

b. Non- polar  

c. Spherical  

d. Linear 

Answer- Non- polar

Que- Which of the following element has the maximum electron affinity_____? 

a. Cl  

b. Br  

c. I  

d. F 

Answer- Cl

Que- The type of hybridisation of boron in diborane is______? 

a. Sp- hybridisation  

b. Sp2- hybridisation  

c. Sp3- hybridisation  

d. Sp3d2- hybridisation 

Answer- Sp- hybridisation

Que- Which of the following shows electrical conduction_____? 

a. Potassium  

b. Graphite  

c. Diamond  

d. Sodium 

Answer- Graphite

Que- Cassiterite is an ore of_______? 

a. Mn  

b. Ni  

c. Sb  

d. Sn 

Answer- Sn

Que- Percentage of lead in lead pencil is________? 

a. Zero  

b. 20  

c. 80  

d. 70 

Answer- Zero

Que- In borax bead test which compound is formed_________? 

a. Ortho burate  

b. Meta borate  

c. Double oxide  

d. Tetra borate 

Answer- Meta borate

Que- Water molecule is________? 

a. V-shaped  

b. Angular  

c. Pyramidal  

d. Triangular planer 

Answer- V-shaped

Que- I3( Tri-iodine) has shape_________? 

a. Trigonal bipyramidal  

b. Linear  

c. Square bipyramidal  

d. Both A and C 

Answer- Linear

Que- BeCl2 has the hybrid orbitaks of type_______? 

a. Sp2  

b. Sp3  

c. Sp  

d. dsp2 

Answer- Sp

Que- Molecular orbital Theory is also called_________? 

a. Bonding theory  

b. Band theory  

c. Antibondingtheory  

d. π and σ bonding theory 

Answer- Antibondingtheory

Que- Formula of Galena is________? 

a. PbS  

b. HgS  

c. AS2S3  

d. FeS2 

Answer- PbS

Que- Ethylene diammine is ligand________? 

a. mono dentate  

b. Bi dentate  

c. tri dentate  

d. Poly dentate 

Answer- Bi dentate

Que- The amount of Zinc (at. Wt=65) necessary to produce 224 ml of H2 by the reaction with an acid will be______? 

a. 0.065gm  

b. 0.65gm  

c. 6.5gm  

d. 7.5gm 

Answer- 7.5gm

Que- Which of the following compounds is not soluble in HNO3___? 

a. CuS  

b. CdS  

c. PbS  

d. AgCl 

Answer- AgCl

Que- Following are the anions of soap which form Ca and Mg ions which we see as curd in water 

a. Sodium hexadecanoate  

b. Sodium octadecanoate  

c. Sodium pentadecanoate  

d. Both A & B 

Answer- Both A & B

Que- The hybridization of nitrogen atom in pyridine is_______? 

a. Sp  

b. Sp2  

c. Sp3  

d. It is not hybridized 

Answer- Sp2

Que- The IUPAC name of pyridines is__________? 

a. Azolo  

b. Azine  

c. Azolidins  

d. Diazine 

Answer- Azine

Que- How many isomeric aldoses are possible for the molecular formula C6H12O6? 

a. 2  

b. 4  

c. 7  

d. 16 

Answer- 16

Que- The systematic name of sucrose is_______? 

a. 1-α-D- glucopyranosyl-2-β-D-fructopyranoside  

b. 11-α-D-glucopyranosyl-2-β-D-fructofuranoside  

c. 1-α-D- glucofuranosyl-2-α-D- fructopyranoside  

d. 1-β- D- glucofuranosyl-2-α- D- fructofuranoside 

Answer- 1-α-D- glucopyranosyl-2-β-D-fructopyranoside

Que- Treatment of sucrose with conc. HNO3 gives__________? 

a. Nitrosucrose  

b. Glucose+ fructose  

c. Oxalic acid  

d. Laevulinic acid 

Answer- Nitrosucrose

Que- Alpha (α) particles are helium (He) nucleus with a charge of __________ ? 

a. e  

b. 2e  

c. 3e  

d. 4e 

Answer- 2e

Que- Elements which emit natural radioactivity are known as __________ ? 

a. Radio elements  

b. Active elements  

c. Radioactive elements  

d. Nuclear elements 

Answer- Radioactive elements

Que- A helium nucleus comprising of two protons and two neutrons with a charge of 2e is _________ ? 

a. Beta particle  

b. Gamma particle  

c. Alpha particle  

d. Negative particle 

Answer- Alpha particle

Que- In SI base units, 1 Bq is equal to __________ ? 

a. 10 disintegration per second  

b. 1.5 disintegration per second  

c. 0.01 disintegration per second  

d. 1 disintegration per second 

Answer- 1 disintegration per second

Que- Chromatography is used to separate _________ ? 

a. Solution  

b. Mixtures  

c. Molecules  

d. Atoms 

Answer- Mixtures

Que- In a group, atomic radii increase due to successive increase of _________ ? 

a. Electronic shells  

b. Proton shells  

c. Neutron shells  

d. Nucleus 

Answer- Electronic shells

Que- Distance at which attractive forces of hydrogen overcome repulsive forces is __________ ? 

a. 75.2pm  

b. 75.3pm  

c. 75.5pm  

d. 75.4pm 

Answer- 75.4pm

Que- Quantum numbers are __________ ? 

a. Arithmetical values  

b. Numerical values  

c. Leometric values  

d. Logical values 

Answer- Numerical values

Que- Column of manometer which faces liquid is __________ ? 

a. Raised  

b. Depressed  

c. Compressed  

d. Remains same 

Answer- Depressed

Que- Process used to separate insoluble particles from liquids is ___________ ? 

a. Drying  

b. Filtration  

c. Sieving  

d. Extraction 

Answer- Filtration

Que- Effective volume is usually taken for ____________ ? 

a. 2 moles of gas  

b. 1 mole of gas  

c. 5 moles of gas  

d. 3moles of gas 

Answer- 1 mole of gas

Que- In whole Periodic Table which element Is Most Reducing Agent ? 

a. Chlorine  

b. lithium  

c. Helium  

d. Neon 

Answer- lithium

Que- One fathom is equal to:__________? 

a. 6 feet  

b. 6 meters  

c. 60 feet  

d. 100 cm 

Answer- 6 feet

Que- What are the metal bearing rocks called? 

a. Bitumen  

b. Bauxite  

c. Metalloids  

d. Ores 

Answer- Ores

Que- Soil pollution is caused by:_________? 

a. Aerosol  

b. Ozone  

c. Acid rain  

d. PAN 

Answer- Acid rain

Que- Radiations are harmful as it:___________? 

a. Causes skin cancer  

b. Causes anemia  

c. Alters body tissue  

d. is unstable 

Answer- Causes skin cancer

Que- The practical problem in Hydrogen production is it:______________? 

a. Weight  

b. Valency  

c. Size  

d. Chemical property 

Answer- Weight

Que- The number of ions produced by [Pt(NH3)]Cl2? 

a. 4  

b. 2  

c. 3  

d. 5 

Answer- 3

Que- Which of the following is solid? 

a. Water  

b. Stone  

c. Both  

d. None 

Answer- Stone

Que- Barret esophagus is good example of__________? 

a. Atrophy  

b. Dysplasia  

c. Metaplasia  

d. Hypertrophy E. Hyperplasia 

Answer- Metaplasia

Que- Which gas is used for artificial ripening of green fruit ? 

a. Carbon dioxide  

b. Acetylene  

c. Ethane  

d. Ethylene 

Answer- Ethylene

Que- Phonon is Quantum of___________? 

a. Longitudinal wave  

b. Elastic wave  

c. Transverse wave  

d. Electromagnetic wave 

Answer- Elastic wave

Que- The concept of ensemble was introduced by____________? 

a. Boltzmann  

b. Gibbs  

c. Carnot  

d. Mexwell 

Answer- Gibbs

Que- Which molecule have stronger London dispersion forces? 

a. Hydrogen gas  

b. Water  

c. Bromine  

d. Hydrochloric acid 

Answer- Water

Que- Urea as a fertilizer contains:____________? 

a. 57% N  

b. 73% N  

c. 46% N  

d. 53% N 

Answer- 46% N

Que- The gas dissolved in water that makes it basic is : 

a. Ammonia 

b. Sulphur dioxide 

c. Hydrogen 

d. Carbon dioxide 

Answer- Ammonia

Que- Which of the following acts as promoter for iron in Haber's process? 

a. Mn 

b. Mo 

c. Mg 

d. W 

Answer- Mo

Que- One property of ammonia is 

a. It is insoluble in water 

b. It is a odourless gas 

c. It is a yellowish gas 

d. Its aqueous solution turns red litmus blue 

Answer- Its aqueous solution turns red litmus blue

Que- Which one of the following is used for dating very old objects of archaeological importance? 

a. Phosphorus-31 

b. Tritium 

c. Radium 

d. Carbon-14 

Answer- Carbon-14

Que- In which of the following substances all carbon atoms are quaternary in nature ? 

a. Graphite 

b. Diamond 

c. Teflon 

d. Napthalene 

Answer- Diamond

Que- Cooking gas is a mixture of 

a. Methane and ethylene 

b. Carbon dioxide and oxygen 

c. Butane and propane 

d. Carbon monoxide and carbon dioxide 

Answer- Butane and propane

Que- Thermal electricity is generated by using which of these ? 

a. Coal only 

b. Coal and Natural Gas only 

c. Coal, Natural Gas and Petroleum 

d. None of these 

Answer- Coal, Natural Gas and Petroleum

Que- Which of the following is the major constituent of LPG? 

a. Methane 

b. Ethane 

c. Propane 

d. Butane 

Answer- Butane

Que- Which variety of coal contains recognisable traces of the original plant material ? 

a. Anthracite 

b. Lignite 

c. Peat 

d. Bitumen 

Answer- Peat

Que- Which of the following processes is used for the production of Biodiesel ? 

a. Transamination 

b. Transcription 

c. Transesterification 

d. Translation 

Answer- Transesterification

Que- Which of the following is used in welding broken pieces of iron rails and machine parts? 

a. Aluminium sulphate 

b. Solder 

c. Aluminium powder 

d. None of the above 

Answer- Aluminium powder

Que- Of the following commonly used materials, the one that is not an alloy is 

a. Steel 

b. Brass 

c. Bronze 

d. Copper 

Answer- Copper

Que- The manufacture of iron from iron ore involves the process of 

a. Oxidation 

b. Reduction 

c. Fractional distillation 

d. Electrolysis 

Answer- Reduction

Que- The manufacturing of iron from iron ore involves the process of 

a. Oxidation 

b. Reduction 

c. Electrolysis 

d. Fractional distillation 

Answer- Reduction

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