Chemistry set 1 MCQs

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Showing 504 questions
Q.241 The process of 'vulcanization' of rubber involves heating raw rubber with:
A carbon
B sulphur
C phosphorus
D silicon
Discuss / Board
Q.242 Which of the following is used as a 'moderator' in a nuclear reactor?
A cadmium
B boron
C heavy water
D liquid sodium
Discuss / Board
Q.243 Which gas is used in the manufacture of vanaspati ghee from vegetable oils?
A oxygen
B nitrogen
C hydrogen
D helium
Discuss / Board
Q.244 Which of the following has the maximum density?
A water at 0 degrees c
B water at 4 degrees c
C ice at 0 degrees c
D water at 100 degrees c
Discuss / Board
Q.245 Which substance is used to retard the setting time of cement?
A gypsum
B alumina
C silica
D limestone
Discuss / Board
Q.246 The bleaching action of Chlorine is due to:
A reduction
B oxidation
C hydration
D substitution
Discuss / Board
Q.247 Which of the following is a neutral oxide?
A mgo
B co2
C no
D na2o
Discuss / Board
Q.248 What is the hybridisation of Carbon in graphite?
A sp
B sp2
C sp3
D dsp2
Discuss / Board
Q.249 Which chemical is known as 'Pearl Ash'?
A sodium carbonate
B potassium carbonate
C calcium carbonate
D magnesium carbonate
Discuss / Board
Q.250 Which of the following noble gases is not present in the atmosphere?
A argon
B helium
C radon
D neon
Discuss / Board
Q.251 Which element is commonly used as a tracer in the diagnosis of thyroid disorders?
A carbon-14
B iodine-131
C cobalt-60
D uranium-238
Discuss / Board
Q.252 The blue color of the copper sulphate crystal is due to:
A copper ions
B sulphate ions
C water of crystallization
D impurities
Discuss / Board
Q.253 Which of the following is the most electronegative element?
A chlorine
B fluorine
C oxygen
D nitrogen
Discuss / Board
Q.254 In the manufacture of Ammonia by Haber's process, the condition for maximum yield is:
A high temperature and high pressure
B low temperature and high pressure
C high temperature and low pressure
D low temperature and low pressure
Discuss / Board
Q.255 Which of the following salts is known as 'Epsom Salt'?
A magnesium sulphate heptahydrate
B copper sulphate pentahydrate
C sodium carbonate decahydrate
D calcium sulphate dihydrate
Discuss / Board
Q.256 The main constituent of 'LPG' used in households is:
A methane
B butane
C ethane
D acetylene
Discuss / Board
Q.257 Which radioactive series is also known as the 'Actinium series'?
A 4n series
B 4n+1 series
C 4n+2 series
D 4n+3 series
Discuss / Board
Q.258 Which among the following is a greenhouse gas that contains only carbon and fluorine?
A methane
B cfcs
C tetrafluoromethane
D carbon dioxide
Discuss / Board
Q.259 Which of the following metals can be cut with a knife?
A sodium
B iron
C copper
D aluminium
Discuss / Board
Q.260 What is the main component of 'Tear Gas'?
A chlorine
B chloropicrin
C ammonia
D ether
Discuss / Board
Q.261 The reaction of an acid with a base to form salt and water is called:
A hydrogenation
B neutralization
C fermentation
D saponification
Discuss / Board
Q.262 Which of the following is a covalent solid?
A solid co2
B ice
C diamond
D nacl
Discuss / Board
Q.263 The concept of 'Half-life' in radioactivity depends on:
A temperature
B pressure
C amount of substance
D nature of the isotope
Discuss / Board
Q.264 Which of the following is the most stable form of Carbon?
A diamond
B graphite
C fullerene
D coal
Discuss / Board
Q.265 Which chemical is used to preserve biological specimens in laboratories?
A acetic acid
B formalin
C acetone
D chloroform
Discuss / Board
Q.266 An orbital can hold a maximum of two electrons. This is according to:
A hunds rule
B aufbau principle
C pauli exclusion principle
D uncertainty principle
Discuss / Board
Q.267 Which of the following acids is present in 'Stinging Nettle' leaves?
A formic acid
B oxalic acid
C methanoic acid
D both a and c
Discuss / Board
Q.268 The major product of the 'Saponification' process is:
A detergent
B soap
C alcohol
D ester
Discuss / Board
Q.269 Which element has the lowest ionization enthalpy in the periodic table?
A helium
B fluorine
C cesium
D francium
Discuss / Board
Q.270 The process of 'Fractional Distillation' is based on the difference in:
A melting points
B solubility
C boiling points
D density
Discuss / Board

Master Chemistry set 1 for All Competitive Exams 2026

Practicing Chemistry set 1 MCQs is one of the most effective ways to prepare for competitive examinations in 2026. This topic-wise question bank contains carefully selected multiple-choice questions designed to strengthen conceptual understanding, improve accuracy, and enhance problem-solving speed. Our collection includes beginner, intermediate, and advanced-level questions frequently asked in JKSSB, SSC, Banking, Railway, Police, Defence, State PSC, and various national-level examinations. Every question is structured to reflect real exam patterns and helps candidates become familiar with objective-type assessment formats. Instant answer verification enables students to identify mistakes immediately and learn the correct approach without wasting valuable preparation time. Regular practice of topic-wise MCQs improves retention, reinforces key concepts, and develops confidence required to perform well under exam pressure. Whether you are revising important concepts, preparing for an upcoming recruitment test, or strengthening weak areas, these practice questions provide a reliable platform for continuous improvement. Consistent participation in MCQ-based learning sessions can significantly increase your chances of achieving higher scores and better ranks in competitive examinations.

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