Chemistry [NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension]: Questions 1 - 6 of 144

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Question 1

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Question

MCQ▾

Which of the following elements are more reactive than hydrogen?

Hg, K, Ni, Co, Cu, Pt

Choices

Choice (4)Response
a.Hg, K, Pt
b.Cu, Pt, Ni
c.Hg, Co, Cu
d.K, Ni, Co

Question 2

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Question

MCQ▾

Which metal is the best conductor of electricity?

Choices

Choice (4)Response
a.Gold
b.Silver
c.Aluminum
d.Sodium

Question 3

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Question

Match List-Ⅰ List-Ⅱ▾

Match the following:

List-Ⅰ (Element)List-Ⅱ (Discoverer)

(A)

Barium

(i)

Daniel Rutherford

(B)

Titanium

(ii)

Marie Curie, Pierre Curie

(C)

Polonium

(iii)

William Gregor

(D)

Nitrogen

(iv)

Carl Wihhelm Scheele

Choices

Choice (4)Response
  • (A)
  • (B)
  • (C)
  • (D)
a.
  • (iii)
  • (ii)
  • (i)
  • (iv)
b.
  • (iv)
  • (iii)
  • (ii)
  • (i)
c.
  • (iv)
  • (i)
  • (ii)
  • (iii)
d.
  • (i)
  • (iii)
  • (iv)
  • (ii)

Question 4

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Question

MCQ▾

Which of the following is an example of a chemical change?

Choices

Choice (4)Response
a.Sublimation
b.Dissolution of salt in water
c.Evaporation of water
d.Rusting of iron

Question 5

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Question

MCQ▾

Which of the following is the correct electronic configuration of Neon?

Choices

Choice (4)Response
a.2,8, 1
b.2,8, 2
c.2,8
d.All of the above

Question 6

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Question

MCQ▾

What are isotopes?

Choices

Choice (4)Response
a.Elements having different atomic masses but same atomic numbers
b.Elements having same atomic numbers as well as atomic masses
c.Elements having same atomic numbers but number of protons is different
d.Elements having same atomic masses but different atomic numbers