721UPPSC2015General ScienceEnglish
Which one of the following materials is strongest?
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Correct option: D — Graphene
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.
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- 722MPPSC2017General ScienceEnglish
Which lubricant is used for heavy machines?
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Correct option: C — Graphite
- 723UKPSC2006General ScienceEnglish
Chemically Dry Ice is
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Correct option: D — Solid carbon dioxide
- 724UPSC2007General ScienceEnglish
Which one of the following nonmetals is not a poor conductor of electricity?
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Correct option: B — Selenium
- 725CGPSC2016General ScienceEnglish
Water gas is
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Correct option: A — CO + H₂
- 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?
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Correct option: C — 1 and 2
- 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?
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Correct option: C — 1, 2 and 4
- 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.
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Correct option: A — 1 and 2
- 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?
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Correct option: C — 580 kg
- 730BPSC2005General ScienceEnglish
Burning of Hydrogen produces
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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".