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Chemistry - MOST IMPORTANT UPSC EPFO Previous Year Questions

Practice real questions from previous year exams of UPSC EPFO.

📘 Chemical Reactions📚 Exothermic Reaction

Q1

Combustion of a candle is a

🎯 UPSC EPFO APFC 2002

A.

Photochemical reaction

B.

Exothermic reaction

C.

Physical change

D.

Endothermic reaction

📘 Classification of Matter on the basis of Chemical Properties- I📚 Pure Substance- Element

Q2

Which of the following is a chemical compound?

🎯 UPSC EPFO APFC 2002

A.

Air

B.

Oxygen

C.

Ammonia

D.

Mercury

📘 Polymer📚 Types of polymers on basis of Structure- Natural, Semi-Synthetic, Synthetic

Q3

Carbohydrates are stored in the body as

🎯 UPSC EPFO APFC 2002

A.

Sugars

B.

Starch

C.

Glucose

D.

Glycogen

📘 Organic Chemistry📚 Misc

Q4

Which one of the following is not a Vitamin?

🎯 UPSC EPFO APFC 2004

A.

Folic acid

B.

Oleic acid

C.

Pantothenic acid

D.

Ascorbic acid

📘 Chemistry in Everyday Life📚 Misc

Q5

Which one of the following statements is not correct?

🎯 UPSC EPFO APFC 2004

A.

The deficiency of Vitamin A causes night blindness

B.

Pain in the muscles and joints along with fatigue, loss of weight and poor wound healing are the symptoms of the deficiency of Vitamin C

C.

Bleeding gums and loosening of teeth are symptoms of the deficiency of Vitamin B,

D.

The deficiency of Vitamin B can cause inflammation of skin, memory disorder and Diarrhoea

📘 Pure Substance- Element-Classification of Matter on the basis of Chemical Properties- II📚 Metals and its properties

Q6

Which one of the following elements is not naturally found in human beings?

🎯 UPSC EPFO APFC 2004

A.

Copper

B.

Zinc

C.

Iodine

D.

Lead

📘 Organic Chemistry📚 Alcohol

Q7

Assertion (A): Glycerol is a constituent of shaving cream. Reason (R): Glycerol is an antiseptic.

🎯 UPSC EPFO APFC 2004

A.

Both A and R are true and R is the correct explanation of A

B.

Both A and R are true but R is NOT the correct explanation of A

C.

A is true but R is false

D.

A is false but R is true

📘 Organic Chemistry📚 Alcohol

Q8

Assertion (A): Phenol is commonly used as a disinfectant. Reason (R): Phenol is not harmful to living human tissues even at a very high concentration.

🎯 UPSC EPFO APFC 2004

A.

Both A and R are true and R is the correct explanation of A

B.

Both A and R are true but R is NOT the correct explanation of A

C.

A is true but R is false

D.

A is false but R is true

📘 Environmental Chemistry📚 Air Pollutants

Q9

Which of the following is detected and estimated by the Pollution Check' carried out on motor cars at service stations?

🎯 UPSC EPFO APFC 2004

A.

Lead and carbon particles

B.

Oxides of nitrogen and sulphur

C.

Carbon monoxide

D.

Carbon dioxide

📘 Solution📚 Misc

Q10

Assertion (A): The salinity of the open seas is very high compared to that of inland seas. Reason (R): The water of rivers flowing into open seas contains dissolved salts.

🎯 UPSC EPFO APFC 2004

A.

Both A and R are true and R is the correct explanation of A

B.

Both A and R are true but R is NOT the correct explanation of A

C.

A is true but R is false

D.

A is false but R is true

📘 Metallurgy📚 Alloys and Their compositions

Q11

Gun metal is an alloy of

🎯 UPSC EPFO APFC 2012

A.

Copper, Tin and Zinc

B.

Aluminium, Tin and Steel

C.

Copper, Steel and Zinc

D.

Aluminium, Tin and Zinc

📘 Important Chemical Compounds📚 Misc

Q12

The process used to produce Ammonia is :

🎯 UPSC EPFO APFC 2013

A.

Contact process

B.

Haber process

C.

Chlor-alkali process

D.

Creighton process

📘 Pure Substance- Element-Classification of Matter on the basis of Chemical Properties- II📚 Non-metals and its properties

Q13

The non-metal which exists in liquid state at room temperature is :

🎯 UPSC EPFO APFC 2013

A.

Mercury

B.

Sodium

C.

Potassium

D.

Bromine

📘 Discoveries📚 Misc

Q14

2007 Nobel prize for Chemistry was awarded to :

🎯 UPSC EPFO APFC 2013

A.

Gerhard Ertl

B.

Dan Shechtman

C.

Richard Fred Heck

D.

Venkatraman Ramakrishnan

📘 Chemistry in Everyday Life📚 Common Gases used in daily life (LPG, CNG, etc.)

Q15

Which fuel has the highest Calorific Value ?

🎯 UPSC EPFO APFC 2013

A.

Bio-Gas

B.

Methane

C.

Petrol

D.

Hydrogen

📘 Environmental Chemistry📚 Greenhouse Effect

Q16

The term 'Carbon footprint' means

🎯 UPSC EPFO APFC 2015

A.

A region which is rich in coal mines

B.

The amount of reduction in the emission of CO2 by a country

C.

The use of Carbon in manufacturing industries

D.

The amount of greenhouse gases produced by our day-to-day activities

📘 Solution📚 Solubility and Factors affecting Solubility

Q17

Which one of the following gases has the highest solubility in water?

🎯 UPSC EPFO APFC 2017

A.

Chlorine

B.

Ammonia

C.

Carbon dioxide

D.

Nitrogen

📘 Environmental Chemistry📚 Misc

Q18

Bio-remediation is a technology which is being extensively utilized in controlling

🎯 UPSC EPFO APFC 2017

A.

global warming

B.

melting of glaciers

C.

ozone depletion

D.

heavy metal pollutions

📘 Structure of Atom📚 Misc

Q19

Which one of the following is the size of hydrogen atom?

🎯 UPSC EPFO APFC 2021

A.

10^-10 m

B.

10 µm

C.

10 mm

D.

1000 Å

📘 Acids, Bases and Salts📚 Types of Salts -Acidic, Basic, etc.

Q20

Which one of the following substances, when added to water, will not change the pH?

🎯 UPSC EPFO APFC 2021

A.

NaHCO3

B.

NH4Cl

C.

Na2CO3

D.

NaCl

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