CIE Chemistry (US-0439): Specimen Questions with Answers 133 - 135 of 240

Question number: 133

Short Answer Question▾

Write in Short

Substances can be classified as:

Elements can be divided into:

  1. Define each of the following terms:

Mixture (1 Marks)

Explanation

A Mixture is a consist of two or more different elements and/or compounds - physically intermingled

Question number: 134

MCQ▾

Question

Ant stings hurt because of the methanoic acid produced by the ant.

Which substance could, most safely, be used to neutralize the acid?

Choices

Choice (4) Response

a.

Image of substance of choice A

Image of Substance of Choice A

Image of substance of choice A

b.

Image of substance : Choice B

Image of Substance: Choice B

Image of substance: Choice B

c.

Image of substance : Choice C

Image of Substance: Choice C

Image of substance: Choice C

d.

Image of substance : Choice D

Image of Substance: Choice D

Image of substance: Choice D

Answer

d.

Explanation

Correct Option is D i. e. oven cleaner of pH because methanoic acid (formic acid) because mothanoic acid can only neutralize by substance which have . Baking soda is not correct because it can not completely neutralize it completely.

Question number: 135

Short Answer Question▾

Write in Short

Aluminum is used to make high voltage electricity cables

details of four metals

Details of Four Metals

details of four metals

The table shows some properties of four metals which could be used for overhead power cables.

overhead power cables.

Overhead Power Cables.

overhead power cables.

Suggest why aluminum, rather than tungsten, is used in overhead power cables?

………………………………………………………………………………………………………………

Explanation

Aluminum, rather than tungsten, is used in overhead power cable because has less melting point than tungsten.