NCERT Class 12 Chemistry Objective type Questions & Answers

NCERT Class 12 Chemistry Multiple Choice Questions(MCQs) & Answers NCERT Class 12 Chemistry QUESTIONS

NCERT Class 12 Chemistry Objective type Questions & Answers

51 A drug that is antiseptic as well as analgesic is
A Para acetamidophenol
B Paracetamol
C Chloropromazine hydrochloride
D Chloramphenicol

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

Answer: Chloramphenicol
53 Which has the highest freezing point?
A 1 M glucose
B 1 M AlF3
C 1 M NaCl
D 1 M CaCl2

Answer: 1 M glucose
54 The temperature at which 10% aqueous solution of (W/V) of glucose will show the osmotic pressure of 16.4 atom is (R = 0.082 L atom K-1 mol-1)
A 360 K
B 300 K
C 180 K
D 360°C

Answer: 360 K
55 The composition of copper matte is
A Cu2S + FeS
B Cu2O + FeS
C Cu2S + Cu2O
D Cu2S + FeO

Answer: Cu2S + FeS
56 A number of elements are available in earth’s crust but most abundant elements are ___________ .
A Al and Fe
B Cu and Ag
C Al and Cu
D Fe and Cu

Answer: Al and Fe
57 In the extraction of chlorine by electrolysis of brine ___________ .
A oxidation of Cl– ion to chlorine gas occurs.
B reduction of Cl– ion to chlorine gas occurs.
C For overall reaction ∆G° has negative value.
D a displacement reaction takes place.

Answer: oxidation of Cl– ion to chlorine gas occurs.
58 When 1 mole of benzene is mixed with 1 mole of toluene (vapour pressure of benzene – 12.8 kPa, Toluene = 3.85 kPa)
A The vapour will contain equal amount of benzene and toluene.
B Not enough information is given for prediction.
C The vapour will contain a higher percentage of benzene.
D The vapour will contain higher percentage of toluene.

Answer: The vapour will contain a higher percentage of benzene.
59 What is mole fraction of solute in 1.00 m aqueous solution?
A 0.0354
B 0.0177
C 1.770
D 0.177

Answer: 0.0177
60 Cone. H2SO4 is 98 % H2SO4 by mass has d = 1.84 g cm-3. Volume of acid required to make one litre of 0.1 M H2SO4 is
A 30 mL
B 5.55 mL
C 10 mL
D 20 mL

Answer: 5.55 mL

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