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

Question 93

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

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

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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