CHEMISTRY SET 04

SET 04

SET 04

GENERAL KNOWLEDGE
CHEMISTRY QUESTIONS

• Total Questions : 50
• Total Marks : 100
• Mark Deduction : 0.5

Question No.1

Which of the following element is used to increase the protection resistance of steel?

1. A Chromium
2. B Copper
3. C Tungsten
4. D Vanadium

Correct Answer :  A

Select Answer

Question No.2

Continuous use of the secondary refrigerant is as follows

1. A Big freezers
2. B Domestic refrigerators
3. C Ice making factory
4. D Water cooling

Correct Answer :  C

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Question No.3

Which of the following is used as an anti-freeze in automobile engines?

1. A Propyl alcohol
2. B Ethanol
3. C Methanol
4. D Ethylene glycol

Correct Answer :  D

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Question No.4

CaOCl2 is the chemical formula for a compound regarded as

1. A Soda ash
2. B Lime
3. C Bleaching powder
4. D Plaster of Paris

Correct Answer :  C

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Question No.5

Azurite is a mineral of which of these metals?

1. A Copper
2. B Silver
3. C Magnesium
4. D Iron

Correct Answer :  A

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Question No.6

The process of heating ore in the presence of oxygen is called

1. A Roasting
2. B Calcination
3. C Corrosion
4. D Extraction

Correct Answer :  A

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Question No.7

The presence of ozone in the stratosphere is responsible for

1. A increasing the average global temperature in recent years
2. B higher rate of photosynthesis
3. C checking the penetration of ultra-violet rays to the earth
4. D supplying oxygen for people travelling in jets

Correct Answer :  C

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Question No.8

The most suitable vessel for storing conc. Sulphuric acid is

1. A Copper vessel
2. B Aluminium vessel
3. C Glass vessel
4. D Earthern vessel

Correct Answer :  C

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Question No.9

Galvanised iron is made by coating iron with

1. A Zinc
2. B Nickel
3. C Chromium
4. D Sulphur

Correct Answer :  A

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Question No.10

Which element is called 'wandering element' in chemistry?

1. A Carbon
2. B Oxygen
3. C Nitrogen
4. D Hydrogen

Correct Answer :  D

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Question No.11

The most common elements found in stones and minerals are

1. A Silicon
2. B Carbon
3. C Hydrogen
4. D Gold

Correct Answer :  A

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Question No.12

Which metal alloy is used as a component in aeroplanes and railways coaches?

1. A Copper
2. B Iron
3. C Aluminium
4. D Nono of these

Correct Answer :  C

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Question No.13

During oxyacetylene flame cutting, the metal cut due to

1. A metal evaporation
2. B metal burning
3. C process of synchronization
4. D deep oxidation

Correct Answer :  D

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Question No.14

The first synthetic fibre created by man was

1. A Nylon
2. B Rayon
3. C Terracotta
4. D Polyester

Correct Answer :  A

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Question No.15

Soda water is

1. A Gas-liquid solution
2. B Solid-liquid solution
3. C Liquid-liquid solution
4. D None of these

Correct Answer :  A

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Question No.16

Which of the following atom has the lowest volume?

1. A Si
2. B P
3. C He
4. D S

Correct Answer :  C

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Question No.17

From which of the following ores iron is found?

1. A Pyrite
2. B Hematite
3. C Halite
4. D Azurite

Correct Answer :  B

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Question No.18

Which of the following substances is made up of only one element?

1. A Diamond
2. B Sand
3. C Glass
4. D Water

Correct Answer :  A

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Question No.19

Which of the following is a polymer?

1. A Vinyl chloride
2. B Urea
3. C Starch
4. D Styrene

Correct Answer :  C

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Question No.20

A mixture of water and chalk can be separated by

1. A Sedimentation
2. B Evaporation
3. C Distillation
4. D Filtration

Correct Answer :  A

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Question No.21

Resultant obtained by the steam flow on the red hot coke is

1. A Water gas
2. B Hydrogen
3. C Nitrogen
4. D Carbon dioxide

Correct Answer :  A

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Question No.22

Which of the following cannot be divided?

1. A Nucleus
2. B Photon
3. C Positive ion
4. D Atom

Correct Answer :  B

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Question No.23

The Boyles rule applies to which of the following situation?

1. A Fixed pressure
2. B Fixed temperature
3. C Constant pressure and temperature
4. D Constant pressure but the variable temperature

Correct Answer :  B

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Question No.24

In which of the following compound ionic bond is formed?

1. A KCl
2. B H2O
3. C NH3
4. D Cl3

Correct Answer :  A

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Question No.25

What is the chemical formula of caustic soda?

1. A NaOH
2. B NaCl
3. C NaCO3
4. D Na2CO3

Correct Answer :  A

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Question No.26

A mixture of two evaporative liquids, whose boiling points differ, is separated by

1. A Filtration
2. B Sedimentation
3. C Chomatographically
4. D Distillation

Correct Answer :  D

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Question No.27

The ingredient gases of air are generally

1. A Nitrogen and oxygen
2. B Nitrogen only
3. C Only oxygen
4. D Carbon monoxide only

Correct Answer :  B

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Question No.28

Aqua regia is a mixture of

1. A HCl & H2SO4
2. B H2SO4 & HNO3
3. C H2SO4 & HNO3 & HCl
4. D None of these

Correct Answer :  D

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Question No.29

Whose name is associated with the modern periodic table?

1. A Newland
2. B Hund
3. C Mendeleev
4. D Moseley

Correct Answer :  D

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Question No.30

Which of the following elements acts chemically in the same way as both metals and non-metals?

1. A Argon
2. B Lead
3. C Chromium
4. D Boron

Correct Answer :  D

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Question No.31

The setting down of the Plaster of Paris consists of

1. A Dehydration
2. B Oxygenation
3. C Reduction
4. D Hydration to make other hydrates

Correct Answer :  D

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Question No.32

Which of the following has the zero electron affinity in the periodic table?

1. A Radium
2. B Oxygen
3. C Nitrogen
4. D Radon

Correct Answer :  D

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Question No.33

Alkaline water decomposition of oils and fats give, soaps and ______

1. A Ethanol
2. B Glycol
3. C Glycerol
4. D Ethanoic acid

Correct Answer :  C

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Question No.34

Beryllium Sulphate is less soluble in water due to

1. A High inflammable energy
2. B Low Energy of dissociation
3. C Low inflammable energy
4. D Ionic bond

Correct Answer :  A

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Question No.35

A real gas at a much higher pressure than an ideal gas has

1. A Same volume
2. B Low volume
3. C High volume
4. D None of these

Correct Answer :  B

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Question No.36

What is the name of that system, which uses radioactivity to decide the period of materials of-pre-historic period ?

1. A Radium dating
2. B Carbon dating
3. C Uranium dating
4. D Deuterium dating

Correct Answer :  C

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Question No.37

The three elements most needed in common fertilisers are :

1. A Sulphur, Phosphorous and Sodium
2. B Phosphorous, Sodium and Nitrogen
3. C Nitrogen, Potassium and Phosphorous
4. D Calcium, Phosphorous and Potassium

Correct Answer :  Calcium, Phosphorous and Potassium

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Question No.38

An atomic pile is used for

1. A producing X-rays
2. B conducting nuclear fission
3. C conducting thermonuclear fusion
4. D accelerating atoms

Correct Answer :  B

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Question No.39

Milk is a colloidal system in which:

1. A Water is dispersed in fat
2. B Fat is dispersed in water
3. C Fat and water are dispersed in each other
4. D Fat is dissolved

Correct Answer :  B

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Question No.40

Cement is made hard with

1. A dehydration
2. B Dissociation of water
3. C Polymerisation
4. D hydration and dissociation of water

Correct Answer :  D

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Question No.41

Soap is prepared by boiling caustic soda with

1. A Alcohol
2. B Kerosene oil
3. C Glycerine
4. D Fats

Correct Answer :  D

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Question No.42

The acid used in lead storage cells is

1. A phosphoric acid
2. B sulphuric acid
3. C hydrochloric acid
4. D nitric acid

Correct Answer :  B

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Question No.43

Which among the following is a carbohydrate ?

1. A Nylon
2. B Cane-sugar
3. C Turpentine
4. D Hydrogen peroxide

Correct Answer :  B

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Question No.44

When there are two electrons in the same orbital, they have:

1. A same spin
2. B opposite spin
3. C same or opposite spin
4. D no spin

Correct Answer :  B

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Question No.45

What happens when a chemical bond is formed ?

1. A energy is always absorbed
2. B energy is always released
3. C more energy is released than is absorbed
4. D energy is neither released nor absorbed

Correct Answer :  A

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Question No.46

Silk fibre chemically is :

1. A Carbohydrate
2. B Fat
3. C Protein
4. D Cellulose

Correct Answer :  C

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Question No.47

The substance which does not expand on going from liquid state to solid state is

1. A Water
2. B Cast-iron
3. C Aluminium
4. D Type metal

Correct Answer :  D

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Question No.48

Where does the oxygen that keeps us alive come from?

1. A Carbon dioxide
2. B Carbonates absorbed from soil
3. C Oxides of minerals
4. D Water

Correct Answer :  D

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Question No.49

Commercial nitric acid is coloured because it contains dissolved

1. A Oxygen
2. B Nitrous oxide
3. C Nitrogen dioxide
4. D Coloured impurities

Correct Answer :  C

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Question No.50

In which of the following states maximum iron ore is found ?

1. A FeCO₃
2. B Fe₂O₃
3. C Fe₃O₄
4. D FeS₂

Correct Answer :  B

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