MCQOPTIONS
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MCQOPTIONS
This section includes 621 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge (GK) knowledge and support exam preparation. Choose a topic below to get started.
| 551. |
Plaster of paris chemically known as |
| A. | Sodium Aluminate |
| B. | Calcium sulphate |
| C. | Spdium bicarbonate |
| D. | Sodium acetate |
| Answer» C. Spdium bicarbonate | |
| 552. |
Philosopher s wool is chemically - |
| A. | Aluminium oxide |
| B. | Magnesium oxide |
| C. | Zinc oxide |
| D. | Calcium oxide |
| Answer» D. Calcium oxide | |
| 553. |
Chemically fats and oils are: |
| A. | Triesters |
| B. | Amines |
| C. | Aldehydes |
| D. | Ketons |
| Answer» B. Amines | |
| 554. |
Teryleneisa condensation polymer of ethylene glycol and which acid? |
| A. | Benzoic Acid |
| B. | Salicylic acid |
| C. | Phthalic acid |
| D. | Terephthalic acid |
| Answer» E. | |
| 555. |
The metal chiefly used for galvanizing iron is: |
| A. | Zine |
| B. | Mercury |
| C. | Cadmium |
| D. | Tin |
| Answer» B. Mercury | |
| 556. |
This substance is sweet-smelling and is used in making perfumes and flavouring agents. It is called- |
| A. | Sodium ethanoate |
| B. | Lime water |
| C. | Hydrogencarbonates |
| D. | Ester |
| Answer» E. | |
| 557. |
The enormous amount of energy released in an explosion of an atomic bomb is due to the - |
| A. | conversion of mass into energy |
| B. | conversion of chemical energy into heat energy |
| C. | conversion of mechnical energy into nuclear energy |
| D. | conversion of neutrons into protons |
| Answer» E. | |
| 558. |
In Nuclear reactors graphite is used as |
| A. | Lubricant |
| B. | Fuel |
| C. | Linear of the reactor |
| D. | Modulator |
| Answer» E. | |
| 559. |
The basic process taking place in nuclear reactors is - |
| A. | Radioactivity |
| B. | Fission |
| C. | Fusion |
| D. | None of the above |
| Answer» C. Fusion | |
| 560. |
Graphite is used in nuclear reactors for- |
| A. | reducing the speed of fast neutrons |
| B. | cooling the reactor |
| C. | absorbing neutrons |
| D. | None of the above |
| Answer» B. cooling the reactor | |
| 561. |
Which one of the following elements is essential for the construction of nuclear reactors? |
| A. | Cobalt |
| B. | Nicke |
| C. | Zirconium |
| D. | Tungsten |
| Answer» D. Tungsten | |
| 562. |
Ethylene is a molecule. |
| A. | polar |
| B. | ionic |
| C. | covalent |
| D. | nonpolar |
| Answer» E. | |
| 563. |
Human nails are made up of - |
| A. | Pigment |
| B. | Elastin |
| C. | Albumin |
| D. | Keratin |
| Answer» E. | |
| 564. |
Radiations which is not emitted during radioactivity is |
| A. | rays |
| B. | rays |
| C. | rays |
| D. | Cathode rays |
| Answer» E. | |
| 565. |
What happens when a drop of glycerol is added to crushed KMnO4 spread on a paper? |
| A. | There is a crackling sound |
| B. | There is a violent explosion |
| C. | There is no reaction |
| D. | The paper ignites |
| Answer» C. There is no reaction | |
| 566. |
Ozone consists of - |
| A. | Oxygen only |
| B. | Oxygen and Nitrogen |
| C. | Hydrogen and Carbon |
| D. | Oxygen and Carbon |
| Answer» B. Oxygen and Nitrogen | |
| 567. |
When Arsenic atoms are added Germanium lattice, it becomes a/an - |
| A. | Insulator |
| B. | Superconductor |
| C. | Intrinsic semiconductor |
| D. | Extrinsic semiconductor |
| Answer» E. | |
| 568. |
The isotope used for the production of atomic energy is - |
| A. | U-235 |
| B. | U-238 |
| C. | U-234 |
| D. | U-236 |
| Answer» B. U-238 | |
| 569. |
Nuclear energy is a mineral-based energy source. It is derived from |
| A. | uranium |
| B. | thorium |
| C. | plutonium |
| D. | All tithe above |
| Answer» B. thorium | |
| 570. |
Isotopes differ in - |
| A. | No. of electrons |
| B. | No. of protons |
| C. | No. of neutrons |
| D. | Chemical reactivity |
| Answer» D. Chemical reactivity | |
| 571. |
In an oxygen molecule, two atoms are united by - |
| A. | one bond |
| B. | two bonds |
| C. | three bonds |
| D. | four bonds |
| Answer» C. three bonds | |
| 572. |
Tooth enamel is the hardest substance found in the human body. What is it made up of - |
| A. | Calcium carbonate |
| B. | Limestone |
| C. | Calcium phosphate |
| D. | Calcium fluoride |
| Answer» D. Calcium fluoride | |
| 573. |
Ozone depletion in the atmosphere is mainly caused by - |
| A. | sulphur dioxide |
| B. | nitrogen dioxide |
| C. | hydrogen sulphide |
| D. | chlorofluorocarbon |
| Answer» E. | |
| 574. |
The depletion of ozone layer is due to - |
| A. | chloro fluoro carbon |
| B. | carbon dioxide |
| C. | sulphur dioxide |
| D. | ethane |
| Answer» B. carbon dioxide | |
| 575. |
Ozone layer is present in - |
| A. | Troposphere |
| B. | Ionosphere |
| C. | Stratosphere |
| D. | Exosphere |
| Answer» D. Exosphere | |
| 576. |
The depletion in Ozone layer is caused by - |
| A. | Nitrous oxide |
| B. | Carbon dioxide |
| C. | Chlorofluorocarbons |
| D. | Methane |
| Answer» D. Methane | |
| 577. |
Ozone saves the biosphere by absorbing high energy radiations called - |
| A. | Infra-red |
| B. | Gamma rays |
| C. | Ultraviolet rays (UV) |
| D. | X-rays |
| Answer» D. X-rays | |
| 578. |
Washing soda is the common name of- |
| A. | Calcium Carbonate |
| B. | Calcium Bi-Carbonate |
| C. | Sodium Carbonate |
| D. | Sodium Bi-Carbonate |
| Answer» D. Sodium Bi-Carbonate | |
| 579. |
When conc. H2SO4 is added to diy KNO3, brown fumes are evolved. These fumes are due to |
| A. | SO3 |
| B. | SO2 |
| C. | NO2 |
| D. | N2O |
| Answer» D. N2O | |
| 580. |
The pair of compounds used as anesthetic in medicines |
| A. | Ether, Ammonia |
| B. | Nitrous oxide, Chloroform |
| C. | Chloroform, Nitrogen dioxide |
| D. | Nitrogen dioxide, ether |
| Answer» C. Chloroform, Nitrogen dioxide | |
| 581. |
The isotope atoms differ in - |
| A. | number of neutrons |
| B. | atomic number |
| C. | number of electrons |
| D. | atomic weight |
| Answer» B. atomic number | |
| 582. |
The ore which is found in abundance in India is - |
| A. | monazite |
| B. | bauxite |
| C. | magnetite |
| D. | fluorspar |
| Answer» B. bauxite | |
| 583. |
Bonds formed by the sharing of an electron pair between two atoms are known as - |
| A. | Covalent bonds |
| B. | Ionic bonds |
| C. | Weak bonds |
| D. | None of the above |
| Answer» B. Ionic bonds | |
| 584. |
What is the principal ore of aluminium? |
| A. | Dolomite |
| B. | Copper |
| C. | Lignite |
| D. | Bauxite |
| Answer» E. | |
| 585. |
When a bond is formed between two atoms, the energy of the sys-tem will |
| A. | increase |
| B. | decrease |
| C. | remain the same |
| D. | may increase or decrease |
| Answer» D. may increase or decrease | |
| 586. |
Hardest allotrope of carbon is - |
| A. | diamond |
| B. | graphite |
| C. | coke |
| D. | lamp black |
| Answer» B. graphite | |
| 587. |
Which of the following is a metallic ore? |
| A. | Mica |
| B. | Quartz |
| C. | Feldspar |
| D. | Galena |
| Answer» E. | |
| 588. |
is a multibranched polysaccharide of glucose that serves as a form of energy storage in animals and fungi. |
| A. | Cellulose |
| B. | Glycogen |
| C. | Pectin |
| D. | Chitin |
| Answer» C. Pectin | |
| 589. |
Chemical formula of washing soda is - |
| A. | Na2SO4.10H2O |
| B. | NaHCO3 |
| C. | Na2CO3.10H2O |
| D. | Ca(OH)2 |
| Answer» D. Ca(OH)2 | |
| 590. |
Compounds with identical molecular formula but different structures are called - |
| A. | Tetravalent compounds |
| B. | Structural isomers |
| C. | Covalent compounds |
| D. | None of the above |
| Answer» C. Covalent compounds | |
| 591. |
Which one of the following is known as the brown coal ? |
| A. | Anthracite |
| B. | Bituminous |
| C. | Coke |
| D. | Lignite |
| Answer» E. | |
| 592. |
Atoms of different elements have - |
| A. | same atomic number and same electronic configuration |
| B. | different atomic number and same eletronic configuration |
| C. | different atomic number and different number of valence electrons |
| D. | same number of electrons and neutrons |
| Answer» D. same number of electrons and neutrons | |
| 593. |
The apparatus used to test acidity of aqueous solution is - |
| A. | pH meter |
| B. | Ammeter |
| C. | Hygrometer |
| D. | Acidmeter |
| Answer» B. Ammeter | |
| 594. |
Whic of the following pairs of materials serves as electrodes in chargeable batteries commonly used in devices such as torch lights, electric shavers, etc.? |
| A. | Iron and cadmium |
| B. | Nickel and cadmium |
| C. | Lead peroxide and lead |
| D. | Zinc and carbon |
| Answer» C. Lead peroxide and lead | |
| 595. |
When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is - |
| A. | Hydrogen |
| B. | Oxygen |
| C. | Carbon dioxide |
| D. | All of them |
| Answer» D. All of them | |
| 596. |
Carbon dioxide is called a greenhouse gas because - |
| A. | its concentration remains always higher than other gases |
| B. | it is used in photosynthesis |
| C. | it absorbs infrared radiation |
| D. | it emits visible radiation |
| Answer» D. it emits visible radiation | |
| 597. |
Which of the following metals can deposit copper from copper sulphate solution? |
| A. | platinum |
| B. | Mercury |
| C. | Iron |
| D. | Gold |
| Answer» D. Gold | |
| 598. |
The percentage of carbon in cost iron is |
| A. | 0.01 to 0.25 |
| B. | 0.5 to 1.5 |
| C. | 6 to 3 |
| D. | 3 to 5 |
| Answer» E. | |
| 599. |
Fertiliser having high nitrogen content is |
| A. | Urea |
| B. | Ammonium sulphate |
| C. | Ammonium nitrate |
| D. | Calcium citrate |
| Answer» D. Calcium citrate | |
| 600. |
Ferrous sulphate is used in water treatment as a/an - |
| A. | Oxidizing agent |
| B. | Reducing agent |
| C. | Coagulant aid |
| D. | Adsorbent |
| Answer» D. Adsorbent | |