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MCQ Questions for CBSE Class 12 with Answers
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Quiz
Quiz
/
Types of Chemical Reactions Quiz
1.
S + O
2
→ SO
2
Single displacement
Double displacement
Synthesis
Decomposition
2.
2H
2
O → 2H
2
+ O
2
Single displacement
Synthesis
Double displacement
Decomposition
3.
Zn + 2HCl → H
2
+ ZnCl
2
Synthesis
Double displacement
Single displacement
Decomposition
4.
HCl + NaOH → NaCl + H
2
O
Synthesis
Double displacement
Single displacement
Decomposition
5.
2Na + 2H
2
O → 2NaOH + H
2
Synthesis
Single displacement
Double displacement
Decomposition
6.
2Na + Cl
2
→ 2NaCl
Single displacement
Double displacement
Synthesis
Decomposition
7.
CaCO
3
+ 2HCl → CaCl
2
+ H
2
CO
3
Double displacement
Synthesis
Decomposition
Single displacement
8.
CaCO
3
→ CaO + CO
2
Synthesis
Decomposition
Double displacement
Single displacement
9.
What chemical reaction causes corrosion of iron?
Precipitation
Dehydration
Oxidation
Ion-exchange reaction
10.
What type of chemical reaction happens in burning a matchstick?
Complex reaction
Ion–molecule reaction
Explosion
Combustion
11.
In which reaction does water act as a reactant?
Condensation reaction
Hydrolysis
Electrophilic addition reaction
Cope elimination
12.
What chemical reaction uses direct electric current to drive chemical reaction?
Chain reaction
Electrolysis
Combination reaction
Reduction reaction
13.
What chemical reaction causes rancidity in food?
Oxidation of fatty acid
Bacteria
Dehydrogenation
Microorganism
14.
What is the ratio of reactants and products in a chemical reaction called?
Aromaticity
Stoichiometry
Biochemistry
Stereochemistry
15.
What is the molecular formula of ethanol?
C
2
H
5
HO
2
C
2
H
5
O
2
C
2
H
5
OH
3
C
2
H
5
OH
16.
In which process does a substance absorb moisture from the atmosphere?
Deliquescence
Leuckart reaction
Sulfonation
Dealkylation
17.
What substance causes a chemical reaction without itself being affected?
Ethanol
Mixture
Catalyst
Polymer
18.
Name the substance that causes a foaming action in doughs and batters.
Tartaric acid
Leavening agent
Salt
Fats
19.
Who introduced the proton theory of acids and bases?
Jerome Karle and Herbert A. Hauptman
Johannes Nicolaus Brønsted and Thomas Martin Lowry
Gerty Theresa Radnitz and Carl Ferinand Cori
Dmitri Mendeleev and Julius Lothar Meyer
20.
What chemical reaction is involved in the production of soap?
Saponification
Carbonylation
Titration
Esterfication
21.
What reaction of alkoxide ions with alkyl halides gives ether?
Bogert-Cook synthesis
Williamson ether synthesis
Bally-Scholl synthesis
Bamberger triazine synthesis
22.
What chemical reaction produces wine and beer?
Hydroboration-oxidation reaction
Nierenstein reaction
Neutralization reaction
Fermentation
23.
What is the molecular formula of glucose?
C
6
H
12
O
6
C
22
H
32
O
21
C
2
H
2
O
1
C
12
H
22
O
11
24.
What law states that a compound is always composed of the same elements by mass?
Law of definite proportions
Boyle's Law
Avogadro's Law
Ideal Gas Law
25.
What is the molecular formula of hematite?
Fe
2
O
FeO
2
Fe
2
O
3
FeO
26.
What is the ratio of the volume of hydrogen and oxygen present in water?
1:2
1:8
1:1
2:1
27.
What chemical is formed when water reacts with sulfur trioxide?
Sulfoxide
Antimony sulfide
Sulfuric acid
Sulfonic acid
28.
Who developed the ancient atomic theory?
Thucydides and Heraclides Ponticus
Leucippus and Democritus
Anaximander and Proclus
Archytas and Archelaus
29.
What is the conversion of butane to isobutane called?
Polycondensation
Isomerization
Halogenation
Ammoniation
30.
What acid's formula is CH
3
(CH
2
)
7
CH=CH(CH
2
)
7
CO
2
HH?
Oleic acid
Bongkrek acid
Orotic acid
Quadratic acid
31.
Pb
1
SO
4
is the chemical formula of which of the following elements?
Amphibole
Anglesite
Calcite
Zeolite
32.
What is the other name for quick lime?
Sodium oxide
Aluminium oxide
Calcium oxide
Potassium oxide
33.
What reaction involves the absorption of energy to form new products?
Endothermic reaction
Coupling reaction
Exothermic reaction
Athermic reaction
34.
In which reaction does a compound break down into simpler substances?
Single Replacement reaction
Amination
Decomposition reaction
Complexation reaction
35.
With whom did Victor Grignard win the Nobel Prize for Chemistry in 1912 for discovering the use of nickel as a catalyst in hydrogenation?
Paul Karrer
Henri Moissan
Paul Sabatier
Frédéric Joliot-Curie
36.
In which reaction does the treatment of amide with bromine and alkali give a primary amine?
Favorskii rearrangement
Hofmann reaction
Pinacol rearrangement
Bargellini reaction
37.
How many types of substitution reactions are there?
7
5
3
2
38.
What is the reaction that adds monomer molecules together to form chains?
Reversible reaction
Hydration reaction
Polymerization
Acetylation reaction
39.
Which of the following is known as slaked lime?
Calcium carbide
Calcium sulphate
Calcium chloride
Calcium hydroxide
40.
In which reaction is ozone employed to cleave the unsaturated compounds?
Alder ene reaction
Achmatowicz reaction
Harries reaction
Baudisch reaction
41.
Who coined the term "ester"?
Richard Joseph Meyer
Friedrich Stromeyer
Leopold Gmelin
Carl Jacob Löwig
42.
What is the branch of chemistry which deals with the study of chemical reaction rate?
Organic chemistry
Electrochemistry
Chemical equilibrium
Chemical kinetics
43.
Which chemical reaction is caused by the absorption of light energy?
Photochemical reaction
Photosynthesis
CBS reduction
Adkins–Peterson reaction
44.
Which compound is represented by the generic formula RMgX?
Baeyer's reagent
Fenton's reagent
Collins reagent
Grignard reagent
45.
Which reaction involves the halogenation of carboxylic acids at the alpha (α) carbon?
Mannich reaction
Dakin-West reaction
Baylis-Hillman reaction
Hell-Volhard-Zelinskii reaction
46.
What reaction is formed when benzaldehyde is treated with a concentrated base?
Cannizzaro reaction
Intermolecular reaction
Bartoli reaction
Cheletropic reaction
47.
Name the product formed by the ammoxidation of propene and ammonia?
Chloroform
Formaldehyde
Polyacrylonitrile
Acrylonitrile
48.
What is the final product of nitration of toluene?
Nitroglycerin
Cyclotrimethylenetrinitramine
Trinitrotoluene
Chlorofluorocarbon
49.
What is the common name of sodium carbonate decahydrate?
Washing soda
Baking soda
Bleaching powder
Caustic soda
50.
Which compound is generated in certain foods as a result of cooking at high temperatures?
Sodium bicarbonate
Acrylamide
Mellitic anhydride
Potassium nitrate
51.
C
8
H
8
is the chemical formula of which compound?
Rubber
Cellulose
Nitrile
Styrene
52.
Name the hydrocarbon that contains at least one carbon-to-carbon double bond?
Alkane
Ketone
Aldehyde
Alkene
53.
Which formula represents the relative ratios of different atoms in a compound?
Structural formula
Empirical formula
General formula
Molecular formula
54.
Which chemical process combines light, gaseous hydrocarbons to produce high-octane components of gasoline?
Nitrification
Esterification
Alkylation
Hydrogenolysis
55.
A redox reaction is one in which...
Both the substances are reduced
One species is reduced and another is oxidized
Both the substances are oxidized
Both the substances are neutralized
56.
Who proposed the concept of acid and base based on the theory of ionization?
Wilhelm Ostwald
Svante Arrhenius
Oskar Klein
Erik Edlund
57.
Which is the earliest sandwich compound?
Ferrocene
Bis(benzene)chromium
Morphine
Metallocene
58.
What reaction takes place between molecular hydrogen and an element or compound in the presence of a catalyst?
Depolymerization
Hydrogenation
Addition reaction
Dimerization
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