MCQ Questions for Class 12 Chemistry Chapter 5 Surface Chemistry Part-1 with Answers

Surface Chemistry Part-1 Class 12 Chemistry MCQs Questions with Answers

Check the below NCERT MCQ Questions for Class 12 Chemistry Chapter 5 Surface Chemistry Part-1 with Answers Pdf free download. MCQ Questions for Class 12 Chemistry with Answers were prepared based on the latest exam pattern. We have Provided Surface Chemistry Part-1 Class 12 Chemistry MCQs Questions with Answers to help students understand the concept very well.

Class 12 Chemistry Chapter 5 Quiz

Class 12 Chemistry Chapter 5 MCQ Online Test

You can refer to NCERT Solutions for Class 12 Chemistry Chapter 5 Surface Chemistry Part-1 to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Surface Chemistry Part-1 Class 12 Chemistry MCQ online test

Q1.	Volume of one mole of any gas at NTP is
	A.11.2 litre
	B.22.4 litre
	C.10.2 litre
	D.22.8 litre

Ans: 22.4 litre

Q2.	Tyndall effect confirms the
	A.gravity effect on the sol. particles
	B.light scattering by the sol. particles
	C.heterogeneous nature of sols.
	D.Brownian motion of the sol. particles

Ans: heterogeneous nature of sols.

Q3.	Which one of the following is alyophilic colloid?
	A.Milk
	B.Gum
	C.Fog
	D.Blood

Ans: Gum

Q4.	Which of the following is not correct for enzyme catalysis?
	A.The enzyme activity is maximum at optimum pH which is between 5-7
	B.Each enzyme is specific for a given reaction
	C.The favourable temperature range of enzyme activity is between 25-37°C
	D.The enzymatic activity is increased in presence of certain substances.called co-enzymes

Ans: The favourable temperature range of enzyme activity is between 25-37°C

Q5.	Presence of traces of arsenious oxide (As₂O₃) in the reacting gases SO₂ and O₃in presence of plantinised asbestos in contact process acts as
	A.catalytic promoter
	B.catalytic poison
	C.dehydrating agent
	D.drying agent

Ans: catalytic poison

Q6.	Shape selective catalysis is a reaction catalysed by
	A.zeolite
	B.enzymes
	C.platinum
	D.Ziegler-Natta catalyst

Ans: zeolite

Q7.	Which of the following types of metals make the most efficient catalyst?
	A.Alkali metals
	B.Transition metals
	C.Inner transition metals
	D.Alkaline earth metals

Ans: Transition metals

Q8.	The oxide of nitrogen which acts as a catalyst in lead chamber process is
	A.NO
	B.NO₂
	C.N₂O₄
	D.H₂O₅

Ans: NO

Q9.	The activity of an enzyme becomes ineffective
	A.at low temperature
	B.at atmospheric pressure
	C.at high temperature
	D.in aqueous medium

Ans: at high temperature

Q10.	Which of the following can adsorb larger volume of hydrogen gas?
	A.Finely divided platinum
	B.Colloidal solution of palladium
	C.Small pieces of palladium
	D.A single metal surface of platinum

Ans: Colloidal solution of palladium

Q11.	Which of the following gases present in a polluted area will be adsorbed most easily on the charcoal gas mask?
	A.H₂
	B.O₃
	C.N₂
	D.SO₂

Ans: SO₂

Q12.	Which kind of catalysis can be explained on the basis of adsorption theory ?
	A.Homogeneous catalysis
	B.Heterogeneous catalysis
	C.Negative catalysis
	D.Auto catalysis

Ans: Heterogeneous catalysis

Q13.	A colloidal system is which liquid is dispersed phase and solid is dispersion medium is classified as
	A.gel
	B.sol
	C.emulsion
	D.aerosol

Ans: gel

Q14.	Which of the following will not form a colloidal system?
	A.Solid-gas
	B.Liquid-gas
	C.Gas-gas
	D.Gas-liquid

Ans: Gas-gas

Q15.	Fog in an example of colloidal system of
	A.liquid in gas
	B.gas in liquid
	C.solid in gas
	D.gas in solid

Ans: liquid in gas

Q16.	Substances which behave as normal electrolytes solution at low concentration and exhibit colloids properties at higher concentration are called
	A.lyophilic colloids
	B.lyophobic colloids
	C.macromolecular colloids
	D.associated colloids

Ans: associated colloids

Q17.	Which of the following acts as the best coagulating agent for ferric hydroxide sol?
	A.Potassium ferrocyanide
	B.Potassium chloride
	C.Potassium oxalate
	D.Aluminium chloride

Ans: Potassium ferrocyanide

Q18.	The formation of micelles takes place only above
	A.critical temperature
	B.Kraft temperature
	C.inversion temperature
	D.absolute temperature

Ans: Kraft temperature

Q19.	The size of colloidal particles ranges between
	A.10^-7 – 10^-8cm
	B.10^-9 – 10^-11cm
	C.10^-4 – 10^-7cm
	D.10^-2– 10^-3 cm

Ans: 10^-4 – 10^-7cm

Q20.	At CMC (critical micelle concentration) the surface molecules
	A.dissociate
	B.associate
	C.become bigger in size due to adsorption
	D.become smaller in size due to decomposition