MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 2539 Mcqs, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 901. |
In Modern Periodic Table, the atomic radius increases ________. |
| A. | While moving from left to right in a period |
| B. | While moving from right to left in a period |
| C. | While moving from bottom to top in a group |
| D. | No option is correct. |
| Answer» C. While moving from bottom to top in a group | |
| 902. |
In which process there is gain of electron? |
| A. | Decomposition |
| B. | Reduction |
| C. | Oxidiation |
| D. | Modification |
| Answer» C. Oxidiation | |
| 903. |
A metal, which exists in liquid state ______. |
| A. | Potassium |
| B. | Tin |
| C. | Mercury |
| D. | Tungsten |
| Answer» D. Tungsten | |
| 904. |
______ is also known as brown coal of the lowest rank of coal due to its relatively low heat content. |
| A. | Bitumen |
| B. | Lignite |
| C. | Anthracite |
| D. | Peat |
| Answer» E. | |
| 905. |
Lustre of the non-metal can be seen in |
| A. | sulphur |
| B. | phosphorus |
| C. | iodine |
| D. | All of the above |
| Answer» D. All of the above | |
| 906. |
Gunmetal is an alloy of: |
| A. | Copper, Zinc, Lead |
| B. | Copper, Lead, Silver |
| C. | Copper, Tin, Zinc |
| D. | Copper, Iron, Nickel |
| Answer» D. Copper, Iron, Nickel | |
| 907. |
How is atomic mass number determined? |
| A. | By total number of protons |
| B. | By total number of neutrons |
| C. | By adding number of protons and neutrons |
| D. | By total number of electrons |
| Answer» D. By total number of electrons | |
| 908. |
In a nuclear reactor, ‘cadmium rods’ are used as which of the following? |
| A. | Fuel |
| B. | Moderator |
| C. | Controller |
| D. | Lubricant |
| Answer» D. Lubricant | |
| 909. |
Net movement of water from a dilute to a concentrated solution through a selectively permeable membrane is called? |
| A. | Diffusion |
| B. | Dispersion |
| C. | Osmosis |
| D. | Absorption |
| Answer» D. Absorption | |
| 910. |
In which form, does water occur in gaseous state in the atmosphere? |
| A. | Snow particles |
| B. | Water drop |
| C. | Water vapour |
| D. | All of these |
| Answer» D. All of these | |
| 911. |
Metal oxides which react with acids, as well as bases, are called: |
| A. | Acidic oxides |
| B. | Neutral oxides |
| C. | Amphoteric oxides |
| D. | Basic oxides |
| Answer» D. Basic oxides | |
| 912. |
Petroleum is a mixture of_______. |
| A. | Hydrocarbon |
| B. | Salts |
| C. | Polymer |
| D. | Elements |
| Answer» B. Salts | |
| 913. |
Phenylmercury acetate ________. |
| A. | Reduces transpiration rate |
| B. | Increases transpiration rate |
| C. | Kills the plant |
| D. | Reduces respiration |
| Answer» B. Increases transpiration rate | |
| 914. |
Ethane with the molecular formula C2H6 has- |
| A. | 6 covalent bonds |
| B. | 7 covalent bonds |
| C. | 8 covalent bonds |
| D. | 9 covalent bonds |
| Answer» C. 8 covalent bonds | |
| 915. |
Glacial acetic acid is- |
| A. | 100% acetic acid free of water |
| B. | Solidified acetic acid |
| C. | Frozen acetic acid |
| D. | Gaseous acetic acid |
| Answer» B. Solidified acetic acid | |
| 916. |
Match the catalysts (Column I) with products (Column II).Column IColumn IICatalystProduct(A) V2O5(i) Polyethylene(B) TiCl4/Al(Me)3(ii) Ethanol(C) PdCl2(iii) H2SO4(D) Iron Oxide(iv) NH3 |
| A. | (A)-(iii); (B)-(iv); (C)-(i); (D)-(ii) |
| B. | (A)-(ii); (B)-(iii); (C)-(i); (D)-(iv) |
| C. | (A)-(iii); (B)-(i); (C)-(ii); (D)-(iv) |
| D. | (A)-(iv); (B)-(iii); (C)-(ii); (D)-(i) |
| Answer» D. (A)-(iv); (B)-(iii); (C)-(ii); (D)-(i) | |
| 917. |
Bagasse is used to produce- |
| A. | Manures |
| B. | Fertilizers |
| C. | Papers |
| D. | Soaps |
| Answer» D. Soaps | |
| 918. |
In electrolytic refining of copper, the electrolyte is a solution of |
| A. | Acidified copper chloride. |
| B. | Acidified copper sulphate. |
| C. | Potassium chloride. |
| D. | Sodium sulphate. |
| Answer» C. Potassium chloride. | |
| 919. |
Chile saltpetre is |
| A. | NaNO3 |
| B. | KNO3 |
| C. | LiNO3 |
| D. | Ca (NO3)2 |
| Answer» B. KNO3 | |
| 920. |
Equal volumes of all gases under the same temperature nd pressure contain equal number of molecules, according to |
| A. | Avogadro's law |
| B. | Charle's law |
| C. | Boyle's law |
| D. | Graham's law |
| Answer» B. Charle's law | |
| 921. |
Inert gases are? |
| A. | Physically inactive |
| B. | Not stable |
| C. | Chemically very active |
| D. | Chemically unreactive |
| Answer» E. | |
| 922. |
___________ is the first metalloid in the modern periodic table. |
| A. | Ge |
| B. | B |
| C. | Si |
| D. | As |
| Answer» C. Si | |
| 923. |
Combination of one volume of nitrogen with three volumes of hydrogen produces |
| A. | one volume of ammonia |
| B. | two volumes of ammonia |
| C. | three volumes of ammonia |
| D. | one and a half volumes of ammonia |
| Answer» C. three volumes of ammonia | |
| 924. |
A _____ material glows with a special colour depending on the nature of gas. |
| A. | Liquid |
| B. | Plasma |
| C. | Solid |
| D. | Semi-solid |
| Answer» C. Solid | |
| 925. |
_________ gets converted to phosgene, when exposed to sunlight |
| A. | Chloroform |
| B. | Acetone |
| C. | Benzene |
| D. | Propylene |
| Answer» B. Acetone | |
| 926. |
Generally covalently bonded molecules ________.I. Have high boiling and melting point as compared to ionically bonded moleculesII. Are poor conductors of electricity.III. Have weak inter-molecular force. |
| A. | Only I and II |
| B. | Only I and III |
| C. | Only II and III |
| D. | All I, II and III |
| Answer» D. All I, II and III | |
| 927. |
Polyester among the following polymers is: |
| A. | Dacron |
| B. | Nylon-6 |
| C. | Bakelite |
| D. | Nylon 6, 6 |
| Answer» B. Nylon-6 | |
| 928. |
In which type of chemical reaction a single product is formed from two or more reactants? |
| A. | Combination reaction |
| B. | Decomposition reaction |
| C. | Displacement reaction |
| D. | Double displacement reaction |
| Answer» B. Decomposition reaction | |
| 929. |
A homogenous mixture of two or more metals is called _______. |
| A. | Compound |
| B. | Polymer |
| C. | Alloy |
| D. | Fiber |
| Answer» D. Fiber | |
| 930. |
In which one of the following the number of electron, proton and neutron are different ? |
| A. | Isotopes |
| B. | Isobars |
| C. | Isotones |
| D. | Allotropes |
| Answer» C. Isotones | |
| 931. |
A person is said to be anemic if his body has deficiency of - |
| A. | Calcium and phosphorous |
| B. | Red Blood Corpuscles |
| C. | White Blood Corpuscles |
| D. | Vitamins |
| Answer» C. White Blood Corpuscles | |
| 932. |
Anions are formed by _______. |
| A. | losing of electrons |
| B. | gaining of electrons |
| C. | gaining of neutrons |
| D. | losing of neutrons |
| Answer» C. gaining of neutrons | |
| 933. |
If a reaction follows the Arrhenius equation, the plot ln k vs 1/(RT) gives straight line with a gradient (-y) unit. The energy required to activate the reactant is |
| A. | \(\frac{y}{R}\;{\rm{unit}}\) |
| B. | –y unit |
| C. | yR unit |
| D. | y unit |
| Answer» E. | |
| 934. |
Charge on proton is equal to the charge on __________. |
| A. | Electron |
| B. | Positron |
| C. | Neutron |
| D. | Alpha particle |
| Answer» C. Neutron | |
| 935. |
A change in which a substance undergoes a change in its physical properties is called ___________. |
| A. | Chemical Properties |
| B. | Physical Properties |
| C. | Chemical Change |
| D. | Physical Change |
| Answer» E. | |
| 936. |
Mixture can be _____________ in nature. |
| A. | Homogeneous |
| B. | Pure substance |
| C. | Heterogeneous |
| D. | Both homogeneous and heterogeneous |
| Answer» E. | |
| 937. |
Galvanisation is a method of protecting steel and iron from rusting by coating them with a thin layer of ______. |
| A. | Tin |
| B. | Copper |
| C. | Aluminium |
| D. | Zinc |
| Answer» E. | |
| 938. |
In small water supplies such as army troops, private plants and swimming pools, the most common disinfectants are |
| A. | Iodine and bromine |
| B. | chlorine and bromine |
| C. | ozone and uv rays |
| D. | chlorine dioxide and potassium permanganate |
| Answer» C. ozone and uv rays | |
| 939. |
According to recent study, Ground water in India is contaminated by which element? |
| A. | Sodium |
| B. | Iron |
| C. | Lead |
| D. | Boron |
| Answer» C. Lead | |
| 940. |
Choose the best method to prevent rusting. |
| A. | Centrifugation |
| B. | Evaporation |
| C. | Galvanization |
| D. | Crystallisation |
| Answer» D. Crystallisation | |
| 941. |
Freon used as a refrigerant is chemically |
| A. | Chlorinated hydrocarbon |
| B. | Fluorinated hydrocarbon |
| C. | Chlorofluoro hydrocarbon |
| D. | Fluorinated aromatic compound |
| Answer» D. Fluorinated aromatic compound | |
| 942. |
pH of lemon juice is 2, that means it is ________. |
| A. | Basic |
| B. | Acidic |
| C. | Neutral |
| D. | None of these |
| Answer» C. Neutral | |
| 943. |
A substance has a definite shape as well as definite volume. This substance is- |
| A. | Gas |
| B. | Liquid |
| C. | Soild |
| D. | Any of these |
| Answer» D. Any of these | |
| 944. |
In the following reaction, fill in the blank.Acid + Base → _______ + Water |
| A. | Carbon dioxide |
| B. | Metal Oxide |
| C. | Hydrogen Gas |
| D. | Salt |
| Answer» E. | |
| 945. |
Chlorination is a process used for water purification. The disinfecting action of chlorine is mainly due to |
| A. | The formation of hydrochloric acid when chlorine is added to water |
| B. | The formation of hypochlorous acid when chlorine is added to water |
| C. | The formation of nascent oxygen when chlorine is added to water |
| D. | The formation of hydrogen when chlorine is added to water |
| Answer» C. The formation of nascent oxygen when chlorine is added to water | |
| 946. |
In anaerobic respiration if yeast is added to fruit juices, the sugar gets converted to which chemical substance? |
| A. | Citric acid |
| B. | Formic acid |
| C. | Lactic acid |
| D. | Alcohol |
| Answer» E. | |
| 947. |
Producer gas is mixture of the following: |
| A. | CO + N2 |
| B. | CO2 + H2 |
| C. | CO2 + N2 |
| D. | CO + N2 + H2 |
| Answer» E. | |
| 948. |
CANCELLEDThe first organic compound to be synthesized in the laboratory was? |
| A. | Urea |
| B. | Tartaric acid |
| C. | Ethylene |
| D. | Acetic acid |
| Answer» B. Tartaric acid | |
| 949. |
Fruit ripening hormone is |
| A. | Ethylene |
| B. | Auxin |
| C. | Kinetin |
| D. | All of these |
| Answer» B. Auxin | |
| 950. |
Ethylamine (C2H5NH2) can be obtained from N-ethylphthalimide on treatement with: |
| A. | NH2NH2 |
| B. | CaH2 |
| C. | NaBH4 |
| D. | H2O |
| Answer» B. CaH2 | |