Explore topic-wise MCQs in General Knowledge.

This section includes 1315 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.

851.

Name the gas used in preparation of bleaching powder

A. Oxygen
B. Hydrogen
C. Nitrogen
D. Chlorine
Answer» E.
Discussion
852.

Name the noble gas which is placed in the third period and eighth group of the Modern Periodic table.

A. Helium
B. Argon
C. Neon
D. Krypton
Answer» C. Neon
Discussion
853.

Name the densest stable element known on earth._x005F_x000D_

A. Osmium
B. Rhodium
C. Aluminium
D. Tungsten
Answer» B. Rhodium
Discussion
854.

Name the acid present in lemon.

A. Phosphoric acid
B. Carbonic acid
C. Citric acid
D. Malic acid
Answer» D. Malic acid
Discussion
855.

NaHCO3 is chemical formula for ___________.

A. Borax
B. Vinegar
C. Lime
D. Baking soda
Answer» E.
Discussion
856.

NaCl has ______.

A. nonpolar bonds
B. polar covalent bonds
C. Metallic bonds
D. ionic bonds
Answer» E.
Discussion
857.

NaCl is a salt which is made up of

A. Strong acid and weak base
B. Weak acid and weak base
C. Strong acid and strong base
D. Weak acid and strong base
Answer» D. Weak acid and strong base
Discussion
858.

Most liquids that conduct electricity are solutions of acids, bases and ______.

A. Copper
B. Aluminium
C. Salts
D. Iron
Answer» D. Iron
Discussion
859.

Most commonly used bleaching agent is

A. Chlorine
B. Alcohol
C. Carbon dioxide
D. Sodium Chloride
Answer» B. Alcohol
Discussion
860.

Monopotassium tartarate was used in

A. Fertiliser
B. Explosives
C. Photography
D. Baking
Answer» E.
Discussion
861.

Molybdenite is an ore/mineral of

A. Molybdenum
B. Nickel
C. Silver
D. Tin
Answer» B. Nickel
Discussion
862.

Molar mass of HNO3?

A. 63 g/mol
B. 53 g/mol
C. 48 g/mol
D. 52 g/mol
Answer» B. 53 g/mol
Discussion
863.

Modern periodic table is based on atomic number of the elements. The significance of atomic number was proved by the experiment of ________

A. Moseley's work on X-ray spectra
B. Bragg's work on X-ray diffraction
C. Mulliken's oil drop experiment
D. Discovery of X-ray by Roentgen
Answer» B. Bragg's work on X-ray diffraction
Discussion
864.

'Minamata' disease was caused by ?

A. Lead
B. Mercury
C. Cadmium
D. Zinc
Answer» C. Cadmium
Discussion
865.

Milk is an example of a

A. Emulsion
B. Solution
C. Gel
D. Suspension
Answer» B. Solution
Discussion
866.

Milk of Magnesia is used as a _x005F_x000D_

A. Laxative
B. Pain killer
C. Sedative
D. Antibiotic
Answer» B. Pain killer
Discussion
867.

Milk is a

A. mixture
B. element
C. metal
D. None of these
Answer» B. element
Discussion
868.

Mg+O2=MgO_x005F_x000D_ Balance the above Chemical equation?

A. 2Mg + O2 ----> 2MgO
B. 2Mg + O ----> 2MgO
C. 2Mg + O ----> MgO2
D. 2Mg + O2 ----> MgO2
Answer» B. 2Mg + O ----> 2MgO
Discussion
869.

Methane contributes towards global warming so it is called a _________________ gas._x005F_x000D_

A. poisonous
B. carcinogenic
C. infectious
D. greenhouse
Answer» E.
Discussion
870.

Methane an air pollutant is produced ______.

A. by action of ultraviolet light on nitrogenous compounds.
B. as a by-product of manufacturing ammoniacal fertilizers
C. by burning of coal in insufficient air
D. by digestion of food by animals
Answer» E.
Discussion
871.

Methyl alcohol and Ethyl alcohol differ in molecular mass by ........ units._x005F_x000D_  _x005F_x000D_

A. 13
B. 14
C. 12
D. 16
Answer» C. 12
Discussion
872.

Metals that are liquid at room temperature?

A. Caesium
B. Gallium
C. Rubidium
D. Mercury
Answer» E.
Discussion
873.

Metals reacts with acids to give:

A. a salt and chlorine
B. a salt and hydrogen
C. a salt and water
D. a salt and base
Answer» C. a salt and water
Discussion
874.

Metals react with sodium hydroxide to produce ___________.

A. oxygen gas
B. sodium
C. water
D. hydrogen gas
Answer» E.
Discussion
875.

Metals are placed on which side of the Modern Periodic table?

A. Top row
B. Left side
C. Right side
D. Bottom row
Answer» C. Right side
Discussion
876.

Metals are generally ______._x005F_x000D_ I. Ductile_x005F_x000D_ II. Malleable_x005F_x000D_ III. Poor conductors of heat

A. Only I and II
B. Only I and III
C. Only II and III
D. All I, II and III
Answer» B. Only I and III
Discussion
877.

Metals can displace each other according to their:_x005F_x000D_

A. Conductivity
B. Resistivity
C. Testability
D. Reactivity
Answer» E.
Discussion
878.

Metal present in chocolate wrappers is

A. Aluminium
B. Haemoglobin
C. Chalk
D. Chlorophyll
Answer» B. Haemoglobin
Discussion
879.

Metal oxides which react with acids as well as bases are called

A. Amphoteric oxides
B. Neutral oxides
C. Basic oxides
D. Acidic oxides
Answer» B. Neutral oxides
Discussion
880.

Matter is classified as a

A. pure substance
B. mixture
C. both 1 & 2
D. none of the above
Answer» D. none of the above
Discussion
881.

Match the following items._x005F_x000D_

A. I – 2, II – 3, III – 4, IV – 1
B. I – 2, II – 3, III – 1, IV – 4
C. I – 3, II – 2, III – 1, IV – 4
D. I – 2, II – 1, III – 3, IV – 4
Answer» B. I – 2, II – 3, III – 1, IV – 4
Discussion
882.

Match the following items of column A with column B._x005F_x000D_  _x005F_x000D_ _x005F_x000D_

A. I – 3, II – 1, III – 2_x005F_x000D_
B. I – 2, II – 1, III – 3_x005F_x000D_
C. I – 2, II – 3, III – 1_x005F_x000D_
D. I – 1, II – 2, III – 3
Answer» C. I – 2, II – 3, III – 1_x005F_x000D_
Discussion
883.

Match the following with the correct response._x005F_x000D_  _x005F_x000D_ _x005F_x000D_  _x005F_x000D_

A. 1 - C, 2 - D, 3 - A, 4 - B
B. 1 - D, 2 - B, 3 - A, 4 - C
C. 1 - B, 2 - D, 3 - A, 4 - C
D. 1 - B, 2 - A, 3 - D, 4 - C
Answer» D. 1 - B, 2 - A, 3 - D, 4 - C
Discussion
884.

Match List -I with List -II and select the correct answer using the code given below the Lists :_x005F_x000D_             List -I                               List-II_x005F_x000D_ (Compound/Molecule)         (Shape of Molecule)_x005F_x000D_ A. CH3F                            1. Trigonal planar_x005F_x000D_ B. HCHO                           2. Tetrahedral_x005F_x000D_ C. HCN                             3. Trigonal pyramidal_x005F_x000D_ D. NH3                             4. Linear

A. 2 4 1 3
B. 2 1 4 3
C. 3 4 1 2
D. 3 1 4 2
Answer» C. 3 4 1 2
Discussion
885.

Mass number is always equal to ______._x005F_x000D_

A. number of protons
B. number of neutrons
C. sum of number of protons and number of electrons
D. sum of number of protons and number of neutrons
Answer» E.
Discussion
886.

Many marine animals use _______________ dissolved in sea-water to make their shells._x005F_x000D_

A. acids_x005F_x000D_
B. alkalis
C. silica
D. carbonates
Answer» E.
Discussion
887.

Manganite is an ore/mineral of

A. Beryllium
B. Chromium
C. Manganese
D. Copper
Answer» D. Copper
Discussion
888.

Major part of biogas is ________.

A. Hydrogen
B. Nitrogen
C. Methane
D. Carbon dioxide
Answer» D. Carbon dioxide
Discussion
889.

Magnetite is an ore/mineral of

A. Beryllium
B. Chromium
C. Iron
D. Lead
Answer» D. Lead
Discussion
890.

Magnesium oxide (MgO) + Water (H2O) = ?

A. [Mg(OH)]
B. [Mg(O2H)2]
C. [Mg2(OH)]
D. [Mg(OH)2]
Answer» E.
Discussion
891.

Magnesium (Mg) + Oxygen (O2) = ?

A. Mg2O
B. MgO4
C. O2Mg
D. MgO
Answer» E.
Discussion
892.

LPG is a mixture of _______.

A. methane and butane
B. butane and propane
C. methane and propane
D. ethane and propane
Answer» C. methane and propane
Discussion
893.

Magnesium is a constituent metal of __________

A. Chlorophyll molecule
B. DNA
C. Mitochondria
D. Ribosomes
Answer» B. DNA
Discussion
894.

Litmus solution is extracted from:_x005F_x000D_  _x005F_x000D_

A. Hydrangea
B. Geranium
C. Petunia
D. Lichen
Answer» E.
Discussion
895.

Liquid sodium is being considered as

A. engine coolant
B. bleaching agent
C. antiseptic
D. None of the above
Answer» B. bleaching agent
Discussion
896.

Limestone is a raw material used by which industry?

A. Aluminium
B. Fertilizers
C. Cement
D. Petrochemicals
Answer» D. Petrochemicals
Discussion
897.

Leakage of which of the following gases caused the Bhopal gas tragedy ?

A. Carbon monoxide
B. Methyl isocyanate
C. Nitrous oxide
D. Hydrogen sulphide
Answer» C. Nitrous oxide
Discussion
898.

Lime water turns milky when carbon dioxide is passed through it. It is due to the formation of

A. Calcium Carbonate
B. Barium Carbonate
C. Calcium Hydrogen Carbonate
D. Calcium Oxide
Answer» B. Barium Carbonate
Discussion
899.

Least distance of distinct vision for normal eye is

A. 15 cm
B. 20 cm
C. 25 cm
D. 30 cm
Answer» D. 30 cm
Discussion
900.

Lime is sometimes applied to soil in order to

A. increase the acidity of the soil
B. make the soil more porous
C. restore nitrates to the soil
D. increase the alkalinity of the soil
Answer» E.
Discussion