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General Science MCQ practice free online · page 75

Questions from RRB, NTPC, Group D and JE past papers. Tap an option to check it instantly — every question shows the correct answer, and most carry the explanation the paper gave.

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  1. 741UPPSC2015General ScienceEnglish

    Heavy water has molecular weight

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    Correct option: B — 20

  2. 742UPPSC2016General ScienceEnglish

    Which one of the following catalysts is used in hydrogenation of vegetable oils?

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    Correct option: C — Nickel

  3. 743UKPSC2005General ScienceEnglish

    Permanent hardness of water is due to

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    Correct option: A — Chlorides and sulphates of Calcium and Magnesium

  4. 744UKPSC2005General ScienceEnglish

    The pH value for water is

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    Correct option: B — Nearly 7

  5. 745MPPSC2000General ScienceEnglish

    Which is the purest form of water?

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    Correct option: C — Rain water

  6. 746UPSC1994General ScienceEnglish

    Water is a good solvent of ionic salts because

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    Correct option: B — It has a high dipole moment

  7. 747UKPSC2005General ScienceEnglish

    Large quantities of drinking water is prepared from impure water by

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    Correct option: A — Desalination

  8. 748JPSC2013General ScienceEnglish

    Which gas is used in the purification of drinking water?

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    Correct option: B — Chlorine

  9. 749RPSC2008General ScienceEnglish

    By which process the sea water can be converted into pure water?

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    Correct option: D — Reverse osmosis

  10. 750UPPSC2013General ScienceEnglish

    The process used for transforming salty water into pure water is called

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    Correct option: D — Reverse osmosis

General Science practice — common questions

Page 75 of this set has 10 questions on it.

Are these General Science questions free to practise?
Yes. Every question on this page is free and needs no account. Create a free account only if you want your progress saved.
Where do these General Science MCQs come from?
They are taken from official past papers of Indian government recruitment exams such as RRB NTPC, RRB Group D and RRB JE, and each question keeps a reference to the exam it appeared in.
Are the questions available in Hindi?
Yes. Many papers are set in both languages, so a large share of these questions are available in Hindi. Use the language filter at the top of the page.
Do the questions show answers and explanations?
Every question shows the correct option. Where the source paper included a worked solution, the explanation is shown under "Show answer".