Olete.in – MCQs, Mock Tests & Government Job Prep | Chemistry G.K Question and Answer

Which isotope is used through the radioactive age estimation technique to obtain (determine) the age of rocks?

1. Uranium isotope
2. Plutonium isotope
3. Thorium isotope
4. Carbon isotope

✅ Correct Answer: 1

The radio isotope used to control the disease like blood cancer (Leukaemia) is:

1. Phosphorus-32
2. Cobalt-60
3. Iodine-131
4. Sodium-24

✅ Correct Answer: 2

Isotones are those which have:

1. Equal number of protons
2. Equal number of neutrons
3. Equal number of nucleons
4. None of these

✅ Correct Answer: 2

The iso electronic of AI+3 is:

1. CI-
2. AI
3. S-
4. F-

✅ Correct Answer: 4

The element which has same mass number but different atomic number is called:

1. Isotope
2. Isobar
3. Isoneutronic
4. Isoelectronic

✅ Correct Answer: 2

By the emission of which isomers are produced:

1. Alpha-ray
2. Beta-ray
3. Gama-ray
4. X-ray

✅ Correct Answer: 2

How many molecules have the methane?

1. Double bond
2. Triple bond
3. Single covalent bond
4. None of these

✅ Correct Answer: 3

What is the shape of the ethylene molecule?

1. Linear
2. Tetrahedral
3. Coplanar triangular
4. Hectohedral

✅ Correct Answer: 3

Which of the following compound is tetrahedral?

1. Ammonia
2. Carbon tetrachloride
3. Water
4. Acetylene

✅ Correct Answer: 2

Through the fused sodium chloride, electric current can pass out due to the presence of:

1. Free electron
2. Free ion
3. Free molecule
4. The atoms of sodium and chlorine

✅ Correct Answer: 2

The higher boiling point of the water occurs due to:

1. Its more specific heat
2. Its more value of the dielectric constant
3. Less molecular disassociation in H20
4. Presence of hydrogen bonding among the molecules of H20

✅ Correct Answer: 2

The tendency to donate the electron is called:

1. Oxidation
2. Reduction
3. catylisation
4. self-induction

✅ Correct Answer: 1

The tendency to accept the electron is called:

1. Oxidation
2. Reduction
3. catylisation
4. Self induction

✅ Correct Answer: 2

The hydrogen burning process is directly associated with:

1. Hydrolysis
2. Reduction
3. Oxidation
4. Hydrogenation

✅ Correct Answer: 3

The rusting of the iron is the example of:

1. Oxidation
2. Reduction
3. Polymerisation
4. Galvanization

✅ Correct Answer: 1

In which of the following chlorine has + 1 oxidation number?

1. Hypochlorous acid
2. Hydrochloric acid
3. Zinc chloride
4. Chlorine

✅ Correct Answer: 1

The element chromium (Cr) has its oxidation number in K2Cr2O7:

1. + 6
2. - 2
3. + 7
4. -7

✅ Correct Answer: 1

Mohr salt is:

1. Simple salt
2. Hybrid salt
3. Double salt
4. Complex salt

✅ Correct Answer: 3

Hydrogen is the most fundamental component of all the acid, it is firstly stated by:

1. Arrhenius
2. Bronsted
3. Devi
4. Lori

✅ Correct Answer: 3

In which of the following silver is not to be present?

1. Horn silver
2. German silver
3. Ruby silver
4. Lunar caustic

✅ Correct Answer: 2

The gaseous law of diffusion was propounded by:

1. Boyle
2. Charles
3. Avogadro
4. Grahm

✅ Correct Answer: 4

The smoke is the example of:

1. the solution of solid in the liquid
2. the solution of liquid in the liquid
3. the solution of solid in the gas
4. the solution of gas in the liquid

✅ Correct Answer: 3

The air is the example of:

1. the solution of solid in the gas
2. the solution of gas in the gas
3. the solution of liquid in the gas
4. the solution of liquid in the solid

✅ Correct Answer: 2

The alloys are:

1. the solution of solid in the solid
2. the solution of solid in the liquid
3. the solution of gas in the liquid
4. the solution of gas in the gas

✅ Correct Answer: 1

The milk is the example of:

1. Solution
2. Colloidal solution
3. Emulsion
4. Air-solution

✅ Correct Answer: 3

The pH value of any solution is 6 then the hydrogen ion concentration in the solution would be:

1. 10-6M
2. 10-10M
3. 1010M
4. 106M

✅ Correct Answer: 1

The element whose oxidation state in its every compound is same:

1. Carbon
2. Fluorine
3. Hydrogen
4. Oxygen

✅ Correct Answer: 2

The acid is a substance which:

1. Accepts (gains) electron
2. Donates electrons
3. Provides (donates) proton
4. Donates OH- ion

✅ Correct Answer: 3

The alkali is a substance which:

1. Provides (donates) proton
2. Accepts proton
3. Donates electron
4. Accepts electron pair

✅ Correct Answer: 2

The substance which makes the blue litmus paper red is :

1. Acid
2. Base
3. Alkali
4. Salt

✅ Correct Answer: 1

The substance which makes the red litmus paper blue is:

1. Acid
2. Alkali
3. Salt
4. None of these

✅ Correct Answer: 2

The first time pH value measurement is done by:

1. Leviatiae
2. Pristley
3. Cauvendish
4. Sorensan

✅ Correct Answer: 4

The average pH value of the human blood is:

1. 5.4
2. 6.2
3. 7.4
4. 8.7

✅ Correct Answer: 3

The average pH value of the milk is:

1. 6.1
2. 6.6
3. 7.4
4. 8

✅ Correct Answer: 2

What is the pH value of pure water?

1. 6.4
2. 6.6
3. 7
4. 7.4

✅ Correct Answer: 3

Which of the following is called philosopher's wool?

1. Zinc bromide
2. Zinc nitrate
3. Zinc oxide
4. Zinc chloride

✅ Correct Answer: 3

The container employed in the process of electrolysis is called:

1. Ammeter
2. Voltmeter
3. Voltammeter
4. Calorimeter

✅ Correct Answer: 3

In the process of electrolysis oxidation occurs at:

1. Cathode
2. Anode
3. Both of these
4. None of these

✅ Correct Answer: 2

In the process of electrolysis reduction occurs at :

1. Cathode
2. Anode
3. Both of these
4. None of these

✅ Correct Answer: 1

Which of the following is utilized in the form of electrolyte of the dry cell (battery)?

1. Ammonium chloride and zinc chloride
2. Sodium chloride and calcium chloride
3. Magnesium chloride and zinc chloride
4. Ammonium chloride and calcium chloride

✅ Correct Answer: 1

The iron container or vessel is galvanized by :

1. Chromium
2. Chromium
3. Aluminium
4. Nickel

✅ Correct Answer: 2

The process of corrosiondoesn’t take place in which of the following metals, when these metals are left free in the air:

1. Iron
2. Copper
3. Gold
4. Silver

✅ Correct Answer: 3

In the galvanic cell, the process takes place is:

1. Transformation of the electrical energy into the chemical energy
2. Transformation of the chemical energy into the electrical energy
3. Transformation of light energy into the electrical energy
4. Transformation of electrical energy into the light energy

✅ Correct Answer: 2

In the exothermic reaction:

1. Heat is absorbed
2. Heat is evolved
3. Heat doesn't change
4. Temperature remains constant

✅ Correct Answer: 2

In the endothermic reaction:

1. Heat is absorbed
2. Heat is evolved
3. Heat doesn't change
4. Temperature remains constant

✅ Correct Answer: 1

The chemical reactions which occur in one direction (from left to right) are called:

1. Reversible reaction
2. Irreversible reactions
3. Endothermic reactions
4. Exothermic reactions

✅ Correct Answer: 1

The catalyst is a substance through which the rates of chemical reactions are:

1. Increased
2. Decreased
3. Changed
4. None of these

✅ Correct Answer: 3

Who is the inventor of the catalyst?

1. Berzeleous
2. Rutherford
3. Louis
4. Kosell

✅ Correct Answer: 1

The catalyst employed in the hydrogenation process of the oils is:

1. Fe
2. Ni
3. Mo
4. Pt

✅ Correct Answer: 2

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G.K Question and Answer - Chemistry MCQs Set II