Skip to content
GyanPrep.in

Free · past papers · answers included

General Science MCQ practice free online · page 73

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.

AllEnglishहिन्दी
No sign-up10 per pageAnswers & explanations
  1. 721UPPSC2015General ScienceEnglish

    Which one of the following materials is strongest?

    Show answer

    Correct option: D — Graphene

  2. 722MPPSC2017General ScienceEnglish

    Which lubricant is used for heavy machines?

    Show answer

    Correct option: C — Graphite

  3. 723UKPSC2006General ScienceEnglish

    Chemically Dry Ice is

    Show answer

    Correct option: D — Solid carbon dioxide

  4. 724UPSC2007General ScienceEnglish

    Which one of the following nonmetals is not a poor conductor of electricity?

    Show answer

    Correct option: B — Selenium

  5. 725CGPSC2016General ScienceEnglish

    Water gas is

    Show answer

    Correct option: A — CO + H₂

  6. 726UPSC1999General ScienceEnglish

    Consider the following statements. Glass can be etched or scratched by 1. Diamond 2. Hydrofluoric Acid 3. Aquarregia 4. Conc. Sulphuric Acid Which of these statements are correct?

    Show answer

    Correct option: C — 1 and 2

  7. 727UPSC2012General ScienceEnglish

    Graphite was in news recently. What is its importance? 1. It is a two-dimensional material and has good electrical conductivity. 2. It is one of the thinnest but strongest materials tested so far. 3. It is entirely made of silicon and has high optical transparency. 4. It can be used as conducting electrodes required for touch screens, LCD’s and organic LED’s. Which of the statement(s) given above is/are correct?

    Show answer

    Correct option: C — 1, 2 and 4

  8. 728UPPSC2001General ScienceEnglish

    Consider the following statements and select the correct answer from given codes below. 1. Water becomes harder due to the presence of Calcium Sulphate and it is not usable. 2. Diamond is harder than copper and iron. 3. Oxygen is the main component of air. 4. Nitrogen is used in the manufacture of vegetable ghee.

    Show answer

    Correct option: A — 1 and 2

  9. 729UPSC1994General ScienceEnglish

    One mole of Hydrogen gas burns in excess of Oxygen to give 290 kJ of heat. What is the amount of heat produced when 4g of Hydrogen gas is burnt under the same conditions?

    Show answer

    Correct option: C — 580 kg

  10. 730BPSC2005General ScienceEnglish

    Burning of Hydrogen produces

    Show answer

    Correct option: D — Water

General Science practice — common questions

Page 73 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".