IGCSE Chemistry Paper-1: Specimen Questions with Answers 93 - 94 of 99

Question 93

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Question

MCQ▾

Locations of elements X, Y, Z, T and U are given in the picture below. Which one of the following statement are false for these elements.

Periodic table – Finding X, Y and Z

Periodic Table – Finding X, Y and Z

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I. X is an alkaline metal

II. Z is a halogen

iii. Y is a noble gas

Choices

Choice (4)
a.i) and iii)
b.ii) and iii)
c.i) ii) and iii)
d.Only iii)

Answer

c.

Explanation

From the above table it can be seen that X is in 1A group, therefore it is alkaline metal.

Y belongs to group VIII A. All the noble gases belong to this group. Therefore Y is a noble gas.

The halogen belongs to group VII. Therefore Z is a halogen.

Therefore all the options are correct.

Question 94

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Question

MCQ▾

Metal oxide when react with an acid forms a salt and water. A metal oxide ZnO (zinc oxide) is reacted with an acid to form ZnSO₄. What could be the acid used.

Metal oxide + Acid Salt + Water

Choices

Choice (4)
a.H₂SO₄
b.HNO₃
c.HCl
d.Question does not provide sufficient data or is vague

Answer

a.

Explanation

Metal oxides react with acid to give a salt and water. Metal replaces hydrogen and products formed are salt and water.

The reaction will be:

ZnO + H₂SO₄ ZnSO₄ + H₂O

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