MCQOPTIONS
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MCQOPTIONS
This section includes 856 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 701. |
Which one of the following organic compounds has fruity smell? |
| A. | lcohol |
| B. | ldehyde |
| C. | ster |
| D. | ther |
| Answer» D. ther | |
| 702. |
The depletion of Ozone layer is mainly due to |
| A. | olcanic eruptions |
| B. | viation fuels |
| C. | adioactive rays |
| D. | hlorofluorocarbons |
| Answer» E. | |
| 703. |
Acid rain is caused due to emission of which of the following into the atmosphere ? |
| A. | xides of nitrogen and sulphur |
| B. | arbon dioxide and carbon monoxide |
| C. | zone and carbon dioxide |
| D. | arbon monoxide and nitrogen |
| Answer» B. arbon dioxide and carbon monoxide | |
| 704. |
The function of skimming tank in sewage treatment is to remove |
| A. | il and fatty substances |
| B. | uspended solids |
| C. | ritty substances |
| D. | norganic substances |
| Answer» B. uspended solids | |
| 705. |
Which of the following is the correct sequence of countries in terms of maximum carbon dioxide emission? |
| A. | hina, USA, European Union, India |
| B. | SA, India, China, European Union |
| C. | hina, India, European Union, USA |
| D. | uropean Union, China, USA, India |
| Answer» B. SA, India, China, European Union | |
| 706. |
When a nutrient like fertilizer is present in large quantities in a water bodies, plants grow and decay in large numbers because of suffocation of pond that does not leave enough oxygen needed to support life. This type of pollution is called |
| A. | mog |
| B. | utrophication |
| C. | reen house effect |
| D. | one of these |
| Answer» C. reen house effect | |
| 707. |
'Bhopal gas tragedy' 1984 is related to which gas |
| A. | luminium Phosphide |
| B. | ethyl bromide |
| C. | ethyl isocyanate |
| D. | arbon dioxide |
| Answer» D. arbon dioxide | |
| 708. |
Ozone layer in the upper parts of the atmosphere serves as a protective shield against harmful |
| A. | olar ultraviolet radiation |
| B. | olar infrared radiation |
| C. | O2 in the air |
| D. | O2 in the air |
| Answer» B. olar infrared radiation | |
| 709. |
Heavy metal pollution of water is caused by: |
| A. | aints |
| B. | ood burning |
| C. | cid Plants |
| D. | omestic sewage |
| Answer» B. ood burning | |
| 710. |
The gas liberated in the Bhopal gas tragedy was: |
| A. | heynl isocynate |
| B. | cetylene |
| C. | thylene |
| D. | ethyl isocynate |
| Answer» E. | |
| 711. |
Sullage water is – |
| A. | aste water released from kitchen |
| B. | aste water released from toilets |
| C. | aste water released from factories |
| D. | aste water released from hospitals |
| Answer» B. aste water released from toilets | |
| 712. |
Which of the following is secondary air pollutant ? |
| A. | hotochemical smog |
| B. | O2 |
| C. | ust particles |
| D. | O2 |
| Answer» E. | |
| 713. |
Which one is not a primary greenhouse gases in the Earth's atmosphere? |
| A. | arbon dioxide |
| B. | ethane |
| C. | itrogen |
| D. | zone |
| Answer» D. zone | |
| 714. |
High concentration hydrocarbon pollutants in atmospheric air causes |
| A. | ancer |
| B. | ilicosis |
| C. | espiratory diseases (e.g.asthma) |
| D. | educed crop yield |
| Answer» B. ilicosis | |
| 715. |
Taj Mahal is greatly affected due to : |
| A. | ourists |
| B. | cid rain |
| C. | eforestation |
| D. | ound pollution |
| Answer» C. eforestation | |
| 716. |
Coating of solid waste with impervious material is known as |
| A. | ncapsulation |
| B. | hemical fixation |
| C. | andfill |
| D. | apping |
| Answer» B. hemical fixation | |
| 717. |
Sulphur dioxide present in the industrial chimney exhaust causes |
| A. | espiratory and lung disease |
| B. | eduction in plant's productivity owing to acid rain |
| C. | orrosion building materials |
| D. | ll of the above |
| Answer» E. | |
| 718. |
Physico-chemical characteristics of water in water sources undergo changes due to |
| A. | quatic macrophytes |
| B. | uatic fungi |
| C. | ffluents |
| D. | vapotranspiration |
| Answer» D. vapotranspiration | |
| 719. |
‘Aerosol’ is known as |
| A. | uspended solid particles in air |
| B. | ollutant gas, present in air |
| C. | icrobes, present in air |
| D. | reen house gas present in air |
| Answer» B. ollutant gas, present in air | |
| 720. |
Chernobyl disaster is the result of pollution by |
| A. | il spill |
| B. | cid rain |
| C. | arbon dioxide |
| D. | adioactive waste |
| Answer» E. | |
| 721. |
The gas which is mainly responsible for the green house effect is: |
| A. | zone |
| B. | xygen |
| C. | arbon dioxide |
| D. | arbon monoxide |
| Answer» D. arbon monoxide | |
| 722. |
An important green-house gas other than methane being produced from the agricultural fields is |
| A. | itrous oxide |
| B. | mmonia |
| C. | ulphur dioxide |
| D. | rsine |
| Answer» B. mmonia | |
| 723. |
Which one of the following contributes largely to the ‘green house effect’ ? |
| A. | zone |
| B. | arbon monoxide |
| C. | arbon dioxide |
| D. | ater vapour |
| Answer» E. | |
| 724. |
Threshold limit value of copper in the atmospheric air is |
| A. | .001 mg/m3 |
| B. | .01 mg/m3 |
| C. | .0 mg/m3 |
| D. | .0 mg/m3 |
| Answer» D. .0 mg/m3 | |
| 725. |
Which of the following is ozone depleting pesticide ? |
| A. | .D.T. |
| B. | enzene |
| C. | ethyl bromide |
| D. | thylene ozonide |
| Answer» D. thylene ozonide | |
| 726. |
Which of the following is not a gaseous air pollutant? |
| A. | xides of nitrogen |
| B. | ydrocarbon |
| C. | moke |
| D. | xides of sulphur |
| Answer» C. moke | |
| 727. |
Ozone depletion in the stratosphere is mainly caused by |
| A. | O2 |
| B. | O2 |
| C. | O |
| D. | hlorofluorocarbons |
| Answer» E. | |
| 728. |
Ozone depletion in the atmosphere is mainly caused by |
| A. | ulphur dioxide |
| B. | itrogen dioxide |
| C. | ydrogen sulphide |
| D. | hlorofluorocarbon |
| Answer» E. | |
| 729. |
What happens when a chemical bond is formed ? |
| A. | nergy is always absorbed |
| B. | nergy in always released |
| C. | ore energy is released than is absorbed |
| D. | nergy is neither released nor absorbed |
| Answer» B. nergy in always released | |
| 730. |
Which of the following is not a donor atom? |
| A. | hosphorus |
| B. | ntimony |
| C. | rsenic |
| D. | luminium |
| Answer» E. | |
| 731. |
'All the four quantum numbers of two electrons in an atom are not the same.' It is the law of – |
| A. | und's rule of maximum multiplicity |
| B. | xclusion Principle of Pauli |
| C. | ncertainty Principle of Hiesenberg |
| D. | vogadro's Law |
| Answer» C. ncertainty Principle of Hiesenberg | |
| 732. |
Soap is prepared by boiling caustic soda with |
| A. | lcohol |
| B. | erosene oil |
| C. | lycerine |
| D. | ats |
| Answer» E. | |
| 733. |
Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes ? |
| A. | orax |
| B. | altpetre |
| C. | ydrogen peroxide |
| D. | odium chloride |
| Answer» E. | |
| 734. |
Detergents clean surfaces on the principle of |
| A. | iscosity |
| B. | urface tension |
| C. | lasticity |
| D. | loatation |
| Answer» C. lasticity | |
| 735. |
Which halide is used in making sensitive emulsion on photograhic film? |
| A. | odium chloride |
| B. | ilver bromide |
| C. | ilver iodide |
| D. | ilver chloride |
| Answer» C. ilver iodide | |
| 736. |
Zinc sulphide is commonly used as |
| A. | ungicide |
| B. | erbicide |
| C. | odenticide |
| D. | eodorant |
| Answer» D. eodorant | |
| 737. |
Which one of the following elements is used in the manufacture of safety matches? |
| A. | raphite |
| B. | hosphorus |
| C. | ilicon |
| D. | odium |
| Answer» C. ilicon | |
| 738. |
The chief source for the production of nitrogeneous fertilizers is : |
| A. | mmonia |
| B. | itric acid |
| C. | itrogen |
| D. | itrogen dioxide |
| Answer» B. itric acid | |
| 739. |
Tetra ethyle lead (TEL) is |
| A. | catalyst in burning fossil fuel |
| B. | n antioxidant |
| C. | reductant |
| D. | n antiknock compound |
| Answer» E. | |
| 740. |
Tear gas is : |
| A. | hloroprene |
| B. | arbonyl chloride |
| C. | itrous oxide |
| D. | leaching powder |
| Answer» C. itrous oxide | |
| 741. |
What is the most commonly used substance in fluorescent tubes? |
| A. | odium oxide and argon |
| B. | odium vapour and neon |
| C. | ercury vapour and argon |
| D. | ercury oxide and neon |
| Answer» D. ercury oxide and neon | |
| 742. |
A thick paste of cement, sand and water is called |
| A. | oncrete |
| B. | .C.C. |
| C. | ortar |
| D. | iln |
| Answer» D. iln | |
| 743. |
Which of the following is used to iodise common salt ? |
| A. | otassium iodide |
| B. | odine |
| C. | otassium iodate |
| D. | odium iodide |
| Answer» D. odium iodide | |
| 744. |
'Fire-fighting clothes' are made from |
| A. | ica |
| B. | sbestos |
| C. | alc |
| D. | teatite |
| Answer» C. alc | |
| 745. |
The chemical(s) most commonly used for cloud seeding or ‘artificial rainmaking’ is/are |
| A. | ilver Iodide |
| B. | odium Chloride |
| C. | ry ice or frozen carbon dioxide |
| D. | ll the above |
| Answer» B. odium Chloride | |
| 746. |
The Refrigerant 'FREON' is |
| A. | alcium Tetra Fluoride |
| B. | ifluoro Dichloro Methane |
| C. | luorspar and Felspar |
| D. | ydrofluosilicic Acid |
| Answer» C. luorspar and Felspar | |
| 747. |
The drug ‘Marijuana’ is a |
| A. | edative |
| B. | ental stimulant |
| C. | allucinating substance |
| D. | ranquillizer |
| Answer» B. ental stimulant | |
| 748. |
The material used in solar cells contains |
| A. | in |
| B. | ilicon |
| C. | aesium |
| D. | hallium |
| Answer» C. aesium | |
| 749. |
What is a common name for the substance which irritates lachrymal glands ? |
| A. | ear Gas |
| B. | aughing Gas |
| C. | naesthetic Gas |
| D. | oble Gas |
| Answer» B. aughing Gas | |
| 750. |
Pyrethrin used in mosquito coil is obtained from |
| A. | seed plant |
| B. | n insect |
| C. | bacterium |
| D. | fungus |
| Answer» B. n insect | |