R4RIN – MCQs, Mock Tests | Chemistry Chemistry MCQ Questions set-8

Atomic bomb is based on which of the following principle?

1. Nuclear fusion
2. Nuclear fission
3. Natural radioactivity
4. All options are correct

✅ Correct Answer: 2

Ionic compounds ______. I. have high boiling point II. have high melting point III. conduct electricity in solution

1. Only I and II
2. Only I and III
3. Only II and III
4. All I II and III

✅ Correct Answer: 4

Which of the following can be beaten and converted into thin sheets?

1. Zinc
2. Phosphorus
3. Sulphur
4. Oxygen

✅ Correct Answer: 1

Which metal is liquid at room temperature?

1. Bromine
2. Chlorine
3. Mercury
4. Cesium

✅ Correct Answer: 3

Generally covalently bonded molecules ______. I. have high boiling and melting point as compare to ionically bonded molecules II. poor conductors of electricity III. have weak intermolecular force

1. Only I and II
2. Only I and III
3. Only II and III
4. All I II and III

✅ Correct Answer: 3

The melting point of ice is ____ K.

1. 253.16
2. 263.16
3. 273.16
4. 283.16

✅ Correct Answer: 3

Find the similarity in the following : Carbon Silicon Boron Arsenic

1. All of them are gases
2. All of them are non-metals
3. All of them are metals
4. No similarity

✅ Correct Answer: 2

Charge on proton is equal to the charge on ______.

1. Electron
2. Positron
3. Neutron
4. Alpha particle

✅ Correct Answer: 2

In the following reaction fill in the blank. Acid + Base ? _______ + Water

1. Carbon dioxide
2. Metal Oxide
3. Hydrogen Gas
4. Salt

✅ Correct Answer: 4

How many atoms are present in a (NH4)2SO4 molecule?

1. 15
2. 14
3. 13
4. 12

✅ Correct Answer: 1

2O represents two ......... of oxygen.

1. ions
2. electrons
3. atoms
4. molecules

✅ Correct Answer: 3

Group 8A of the periodic table contains the

1. least reactive metals
2. most reactive nonmetals
3. most reactive metals
4. least reactive nonmetals

✅ Correct Answer: 4

Which among the following has lowest electron affinity?

1. Fluorine
2. Chlorine
3. Bromine
4. Argon

✅ Correct Answer: 4

Saturated carbon compounds can form which types of chain structures? I. Straight chain II. Branched chain

1. Only I
2. Only II
3. Neither I nor II
4. Both I and II

✅ Correct Answer: 4

___ is used for making chemical apparatus like beakers flasks etc.

1. Potash glass
2. Hard glass
3. Jena glass
4. Soda glass

✅ Correct Answer: 2

Which of the following is a chemical formula of quicklime?

1. Ca2O
2. Ca2CO3
3. CaO2
4. CaO

✅ Correct Answer: 4

_____ is used for making vinegar.

1. Tartaric acid
2. Malic acid
3. Oxalic acid
4. Acetic acid

✅ Correct Answer: 4

Chemical name of vinegar is

1. Onam
2. Pongal
3. Bihu
4. Hornbill

✅ Correct Answer: 2

Which of the following is used as anaesthetics?

1. N2
2. N2O
3. CH4
4. CO2

✅ Correct Answer: 2

What is the maximum number of states of matter?

1. Three
2. Four
3. Five
4. Variable

✅ Correct Answer: 3

Which of the following acts as best adsorbent?

1. Charcoal
2. Activated Charcoal
3. Activated Coconut Charcoal
4. Carbon black

✅ Correct Answer: 3

Chemical formula for sulphurous acid is:

1. H2SO4
2. H2SO3
3. H3SO3
4. H3SO4

✅ Correct Answer: 2

The atoms of Germanium Arsenic Selenium and Bromine contain ...... shells.

1. 3
2. 7
3. 5
4. 4

✅ Correct Answer: 4

Which of the follow is the last element in Newlands Law of Octaves classification?

1. Rhodium
2. Radium
3. Iron
4. Thorium

✅ Correct Answer: 4

Which among the following has the maximum density?

1. Water
2. Ice
3. Ethylene
4. Acetone

✅ Correct Answer: 1

Which of the following elements has the lowest melting point?

1. Xenon
2. Iodine
3. Barium
4. Magnesium

✅ Correct Answer: 1

What is the common name of Sodium Bicarborate?

1. Baking Soda
2. Washing Powder
3. Plaster of Paris
4. Fly Ash

✅ Correct Answer: 1

What is the compound formed when Ag+ and Cl- combine?

1. Argon Chlorate
2. Argon Chloride
3. Silver Chloride
4. Silver Chlorate

✅ Correct Answer: 3

Which of the following gas was released during Bhopal gas tragedy?

1. Methyl isocyanate
2. Sodium isothiocyanate
3. Nitrogen isothiocyanate
4. Potassium isothiocyanate

✅ Correct Answer: 1

In arc welding Argon is used because of its

1. Low reactivity with metal
2. Ability to lower the melting point of the metal
3. High flammability
4. High calorific value

✅ Correct Answer: 1

Which of the following induces souring of milk?

1. Acetic Acid
2. Citric Acid
3. Ascorbic Acid
4. Lactic Acid

✅ Correct Answer: 4

Which of the following bonds are weakest in nature?

1. Single bond
2. Double bond
3. Triple bond
4. Hydrogen bond

✅ Correct Answer: 4

In Mendeleevs periodic table the properties of the elements are considered a periodic function of their:

1. Atomic mass
2. Ionization enthalpy
3. Atomic size
4. Atomic number

✅ Correct Answer: 1