CIE Chemistry (US-0439): Specimen Questions with Answers 163 - 165 of 240

Question number: 163

Short Answer Question▾

Write in Short

Germanium is an element in Group IV. The electron distribution of a germanium atom is 2 + 8 + 18 + 4. It has oxidation states of + 2 and + 4.

  1. Germanium forms a series of saturated hydrides similar to the alkanes.

Predict the general formula of the germanium hydrides.

Explanation

The general formula of the germanium hydrides is

Images of germanium hydrides

Images of Germanium Hydrides

Images of germanium hydrides

Question number: 164

MCQ▾

Question

Strontium has ________ shells

Choices

Choice (4) Response

a.

2

b.

3

c.

4

d.

5

Answer

d.

Explanation

Correct option is D because it has atomic number and electronic configuration having shell.

Question number: 165

MCQ▾

Question

The diagram shows one period of the Periodic Table

The diagram shows one period of the Periodic Table

The Diagram Shows One Period of the Periodic Table

The diagram shows one period of the Periodic Table

Which two elements form acidic oxides?

Choices

Choice (4) Response

a.

Carbon and Lithium

b.

Carbon and Neon

c.

Carbon and Nitrogen

d.

Nitrogen and Neon

Answer

c.

Explanation

Correct option is C i. e. nitrogen and carbon because nitrogen forms dinitrogen trioxide, nitrogen dioxide, and nitrogen pentoxide which is acidic in nature. Carbon forms carbon mono oxide which is slightly acidic in nature. Lithium forms oxide but the oxide is basic and neon is noble gas so it do not forms oxide.