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General Science MCQ practice free online · page 63

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621MPSC2016General ScienceEnglish
Match List-I (Oxidation number) with List-II (the element) and select the correct answer using the code given below the lists. List-I (a) 2 (b) 3 (c) 4 (d) 6 List-II 1. Oxidation number of Mn in MnO₂ 2. Oxidation number of S in H₂SO₄ 3. Oxidation number of Ca in CaO 4. Oxidation number of Al in NaAlH₄
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Correct option: A — a-3, b-4, c-1, d-2
622BPSC1999General ScienceEnglish
What is the usual property of oxides of Group III and IV?
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Correct option: A — Basic and acidic
623BPSC1997General ScienceEnglish
The element found maximum in the soil layer is
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Correct option: A — Oxygen
624UPSC1997General ScienceEnglish
Which one of the following is present in the largest amount in terms of percent by mass in the Earth’s crust?
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Correct option: B — Oxygen
625MPPSC2005General ScienceEnglish
Which is the most abundant element after oxygen?
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Correct option: A — Silicon
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626UPPSC2007General ScienceEnglish
Which of the following is the most common element in the Universe?
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Correct option: A — Hydrogen
627RPSC2003General ScienceEnglish
Approximately, how many different chemical elements exist in the Earth?
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Correct option: D — 100
628UPPSC1995General ScienceEnglish
Which of the following is a fundamental element?
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Correct option: B — Diamond
629UKPSC2007General ScienceEnglish
The chemical composition of diamond is
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Correct option: A — Carbon
630UPSC2003General ScienceEnglish
Assertion (A): In the periodic table of chemical elements, electron affinity is always found to increase from top to bottom in a group. Reason (R): In a group, the atomic radii generally increase from top to bottom.
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Correct option: D — (A) is false, but (R) is true

General Science practice — common questions

Page 63 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.

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General Science MCQ practice free online · page 63

What is the usual property of oxides of Group III and IV?

The element found maximum in the soil layer is

Which one of the following is present in the largest amount in terms of percent by mass in the Earth’s crust?

Which is the most abundant element after oxygen?

Which of the following is the most common element in the Universe?

Approximately, how many different chemical elements exist in the Earth?

Which of the following is a fundamental element?

The chemical composition of diamond is

Assertion (A): In the periodic table of chemical elements, electron affinity is always found to increase from top to bottom in a group. Reason (R): In a group, the atomic radii generally increase from top to bottom.

General Science practice — common questions