641UKPSC2007General ScienceEnglish
The chemical structure of the pearl is
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Correct option: A — Calcium Carbonate
Free · past papers · answers included
General Science MCQ practice free online · page 65
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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- 642UPSC1994General ScienceEnglish
The main constituents of pearl are
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Correct option: B — Aragonite and Conchiolin
- 643RPSC2008General ScienceEnglish
Pearl is mainly constituted of
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Correct option: C — Calcium Carbonate
- 644UPSC2008General ScienceEnglish
What are Rubies and Sapphires chemically known as?
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Correct option: B — Aluminium Oxide
- 645UPPSC2000General ScienceEnglish
These days yellow lamps are frequently used as street light. Which one of the following is used in these lamps?
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Correct option: A — Sodium
- 646UPPSC2007General ScienceEnglish
Sodium Vapour Lamp is usually used as street light, because
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Correct option: B — Light from this is monochromatic and will not split through water droplets
- 647UPPSC2006General ScienceEnglish
The most commonly used substance in fluorescent tubes are
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Correct option: C — Mercury Vapour and Argon
- 648UPPSC2016General ScienceEnglish
Which one of the following metals is accessed in the native state?
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Correct option: B — Gold
- 649UPSC2005General ScienceEnglish
Which one of the following is the correct sequence of the given substances in the decreasing order of their densities?
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Correct option: B — Gold > Mercury > Steel
- 650MPPSC1995General ScienceEnglish
Of how many carats is the pure gold?
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Correct option: B — 24
General Science practice — common questions
Page 65 of this set has 10 questions on it.
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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".