CIE Chemistry (US-0439): Specimen Questions with Answers 98 - 100 of 240

Question number: 98

Short Answer Question▾

Write in Short

How could you determine if a sample of malonic acid is pure?

result if pure [2 Marks]

Explanation

If malonic acid is pure then it starts melting else it will not.

Question number: 99

MCQ▾

Question

Element X is represented by

Which statement about element X is correct?

Choices

Choice (4) Response

a.

An atom of X contains protons and neutrons

b.

An atom of X contains protons and electrons

c.

X forms an ion by gaining electrons

d.

X is placed in Group III of the Periodic Table

Answer

d.

Explanation

Correct option is D because X represent Aluminium and In periodic table Aluminium is placed in group III.

Its atomic number is and It is a silvery-white, soft, nonmagnetic, ductile metal in the boron group. As shown in figure.

Image of Periodic Table

Image of Periodic Table

Image showing the Periodic Table

Question number: 100

Short Answer Question▾

Write in Short

The table shows some physical properties of the Group VII elements.

some physical properties of the Group VII elements

Some Physical Properties of the Group VII Elements

some physical properties of the Group VII elements

A chlorine atom has electrons.

  1. Complete the following structure to show how the electrons are arranged.

Explanation

Image result for electronic configuration of chlorine

electronic configuration of chlorine

Electronic Configuration of Chlorine

electronic configuration of chlorine

Image result for electronic configuration of chlorine

electronic configuration of chlorine cl

Electronic Configuration of Chlorine Cl

electronic configuration of chlorine cl