CBSE Class 12 Chemistry Quiz | CBSE Class 12 Chemistry MCQs & Answers

Sports GK Questions and Answers 2024 (Latest Updated)

Awards & Honours GK Questions 2024 (Latest Updated)

Questions
81 In the commercial electrochemical process for aluminium extraction, electrolyte used is
A A molten mixture of Al2O3 and Na3AlF6.
B A molten mixture of Al2O3 and Al(OH)3.
C Al(OH)3 is NaOH solution.
D An aqueous solution of Al2 (SO4)3.

Answer: A molten mixture of Al2O3 and Na3AlF6.
82 Which ore can be best concentrated by froth floatation process?
A Galena
B Magnetite
C Malachite
D Cassiterite

Answer: Galena
Advertisement
Article and Schedule Quiz Start Test!
DOWNLOAD CURRENT AFFAIRS PDF FROM APP
83 Electrolytic reduction of Al2O3 to Al by Hall- Herault process is carried out
A in presence of cryolite which forms a melt with high melting point.
B in presence of cryolite which forms a melt with lower melting point.
C in presence of NaCl.
D in presence of fluorite.

Answer: in presence of cryolite which forms a melt with lower melting point.
84 The chemical composition of ‘slag’ formed during the melting process in the extraction of copper is
A Cu2O + FeS
B FeSiO3
C CuFeS2
D Cu2S + FeO

Answer: FeSiO3
85 Bessemer converter is used in the manufacture of
A Steel
B Cast iron
C Pig iron
D Wrought iron

Answer: Steel
86 The method of zone refining of metals is based on the principle of
A greater solubility of the impurity in the molten state than in the solid.
B greater noble character of the solid metal than that of impurity.
C greater mobility of the pure metal than that of the impurity.
D higher melting point of the impurity than that of the pure metal.

Answer: greater solubility of the impurity in the molten state than in the solid.
87 Purest form of iron is
A Wrought iron
B Stainless steel
C Hard Steel
D Cast iron

Answer: Wrought iron
88 A drug that is antiseptic as well as analgesic is
A Para acetamidophenol
B Paracetamol
C Chloropromazine hydrochloride
D Chloramphenicol

Answer: Para acetamidophenol
89 Which one is a broad spectrum drug?
A Chloramphenicol
B Plasmoquine
C Chloroquine
D Chloroxylenol

Answer: Chloramphenicol
90 Detergents are better than soaps because
A They can be used in acidic solution
B They are less affected by hard water
C Both (a) and (b)
D They wash clothes better

Answer: Both (a) and (b)
91 Heroin is
A Narcotic
B Antiseptic
C Non-narcotic
D Anaesthetic

Answer: Narcotic
92 Drug which is used to reduce anxiety and brings calmness is known as
A Antacids
B Tranquilizer
C Diuretic
D Analgesic

Answer: Tranquilizer
93 Aspiring is an acetylation product of ______
A p-Dihydroxybenzene
B o-Hydroxybenzoic acid
C o-Dihydroxy benzene
D m-Hydroxy benzoic acid

Answer: o-Hydroxybenzoic acid
94 Which of the following is not an antacid?
A Phenelzine
B Cimetidine
C Ranitidine
D Al(OH)3

Answer: Phenelzine
95 Sodium benzoate is used as
A food preservative
B detergent
C artificial sweetener
D antioxidant

Answer: food preservative
96 Mixture of chloroxylenol and terpineol acts as
A antiseptic
B analgesics
C antipyretic
D antibiotic

Answer: antiseptic
97 Which of the following is used as tranquilizer?
A Chlorpheniramine
B Equanil
C Naproxene
D Tetracycline

Answer: Equanil
98 The manufacture of nylon-6 involves condensation of
A Phenol and formaldehyde
B Urea and formaldehyde
C Adipic acid and hexamethylene diamine
D Ethylene glycol and pthalic acid

Answer: Adipic acid and hexamethylene diamine
99 A polymer of butadiene and acrylonitrile is called
A Buna-2
B Buna-A
C Buna-S
D Buna-N

Answer: Buna-2
100 Which of the following is a biodegrable polymer?
A Nylon-6
B Cellulose
C Polyethene
D PVC

Answer: Cellulose

Random GK Questions

Q. The concept of survival of the fittest was first advocated by
Q. Excess amount of absorbed water by plants is liberated out by:
Q. Who was the founder of Muslim League in India?
Q. The language used in writing the scientific name of animals is
Q. The most important source of revenue for the states in India is
Q. The convection current hypothesis is related to
Assam Direct Recruitment Test Series

Teacher Eligibility Test

Assam Direct Recruitment Test Series