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SCIENCE PRACTICE QUESTIONS

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ACIDS, BASES & SALTS

1.

Which of the following statements about acids are correct?

I. They turn red litmus paper blue.
II. They can be neutralized by bases.
III. Citrus fruits contains acids.

A.

I and II only

B.

II and III only

C.

I and III only

D.

I, II and III

2.

Two unknown solutions labelled A and B were brought to a JHS 3 class. It was observed that in solution A, red litmus paper changed colour to blue, whiles in solution B, red litmus paper retained its colour. What could be the content of solution A?

A.

Car battery fluid

B.

Salt solution

C.

Baking soda

D.

Orange juice

3.

A student who complained of stomach upset was given first aid with Mg(OH)2 boldly written on it. What could be the common name of the first aid the student was given?

A.

Milk of aluminium

B.

Milk of magnesia

C.

Trisilicate

D.

Martins liver salt

4.

One of the properties of acids is that they

A.

turn wet blue litmus paper red.

B.

have no effect on blue litmus paper.

C.

turn wet red litmus paper blue.

D.

are neutral to litmus paper.

5.

Which of the following substances will turn red litmus paper blue?

A.

Hydrochloric acid

B.

Sodium chloride solution

C.

Sulphuric acid

D.

Water

E.

Sodium hydroxide

6.

An unripe orange is said to be acidic because it

A.

has low sugar content.

B.

has bitter taste.

C.

turns red litmus paper blue.

D.

turns blue litmus paper red.

7.

Which of the following substances is a salt?

A.

H2SO4

B.

NaOH

C.

HCl

D.

CaCl2

8.

Which of the following statements about acids are correct?

I. They turn red litmus paper blue
II. They can be classified as either organic or mineral acids
III. They can be neutralized by bases

A.

I and II only

B.

I and III only

C.

II and III only

D.

I, II and III

9.

The reaction between hydrochloric acid and sodium hydroxide produces

A.

sodium oxide only.

B.

sodium chloride only.

C.

sodium oxide and water.

D.

sodium chloride and water.

10.

Which of the following metals will produce a gas when placed in lime juice?

A.

Copper

B.

Lead

C.

Magnesium

D.

Silver

11.

Which of the following substances is capable of neutralizing an acid?

A.

Vinegar

B.

Water

C.

Sodium chloride

D.

Sodium hydroxide

12.

Sodium hydroxide is an example of a base because it

A.

has sour taste.

B.

has a pH less than 7.

C.

turns wet blue litmus paper red.

D.

turns wet red litmus paper blue.

13.

Which of the following substances is acidic?

A.

Wood ash

B.

Salt-petre

C.

Bee strings

D.

Bicarbonate of soda

14.

Use the information below to answer the question that follow.

 

A solid X reacted with a liquid Y to form a salt and water only. A portion of liquid Y turned blue litmus paper red. Solid X did not dissolve when a portion of it was placed in water and stirred.

 

Solid X could be said to be

A.

an acid.

B.

an alkali.

C.

a base.

D.

a salt.

15.

Use the information below to answer the question that follow.

 

A solid X reacted with a liquid Y to form a salt and water only. A portion of liquid Y turned blue litmus paper red. Solid X did not dissolve when a portion of it was placed in water and stirred.

 

Liquid Y is

A.

an acid.

B.

an alkali.

C.

a base.

D.

a metal.

16.

Use the information below to answer the question that follow.

 

A solid X reacted with a liquid Y to form a salt and water only. A portion of liquid Y turned blue litmus paper red. Solid X did not dissolve when a portion of it was placed in water and stirred.

 

If red litmus paper is placed in liquid Y, the colour of the paper will

A.

remain the same.

B.

change to blue.

C.

change to purple.

D.

become brighter.

17.

Lime juice taste sour because it is

A.

acidic.

B.

alkaline.

C.

basic.

D.

salty.

18.

Which of the following compounds is neutral to litmus paper?

A.

HCL

B.

H2O

C.

NaOH

D.

KOH

19.

When an unknown solution reacted with magnesium, a gas was produced. Which of the following solutions could be the unknown solution

A.

Sodium chloride solution

B.

Sodium hydroxide solution

C.

Hydrochloric acid

D.

Calcium nitrate solution

20.

Which of the following statements about acids correct

I. They react with the calcium carbonate to give a gas

II. They turn red litmus paper blue

III. They react with reactive metals to give a gas

IV. They turn blue litmus paper red

A.

I, II and IV only

B.

I, II and III only

C.

II, III and IV only

D.

D. I, III and IV

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