Chemistry-Periodic Classification of Elements (NTSE Stage-2 (National-Level) Scholastic-Aptitude & Language Comprehension): Questions 1 - 2 of 2

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Question number: 1

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

A metal carbonate X on treatment with a mineral acid liberates a gas, which when passed through aqueous solution of a substance Y gives back X. The substances Y on reaction with the gas obtained at anode during electrolysis of brine gives a compound Z which can decolorize colored fabrics. The compounds X, Y and Z respectively are

Choices

Choice (4) Response
a.

CaCO3,Ca(OH)2,CaOCl2

b.

Ca(OH)2,CaCO3,CaOCl2

c.

CaCO3,CaOCl2,Ca(OH)2

d.

Ca(OH)2,CaO,CaOCl2

Question number: 2

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

The reaction between carbon and oxygen can be represented as

C(s)+O2(g)>CO2(g)+Heat

In which of the following type (s), the above reaction can be classified?

I. Combustion reaction

II. Displacement reaction

III. Endothermic reaction

IV. Combination reaction

Choices

Choice (4) Response
a.

Only I

b.

I, III and IV

c.

I and II

d.

I and IV

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