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Revision Ch.5_Acid, bases and salts

Total questions: 27

Worksheet time: 27mins

Name
Class
Date
1.

When the soil is too Basic, what do you add to neutralise the effect ?

a)

Basic Quicklime

b)

Phenolphthalein

c)

Organic Matter

d)

Nitric Acid

2.

When neutralization reaction happens, they form -

a)

Salt and Sodium Chloride

b)

Salt, Water and Heat

c)

Heat and Sugar

3.

Indicators are -

a)

Substances which are nor Acidic or Basic

b)

Substances that are used to test the Acidic or Basic nature of a substance

c)

Substances which have both chemical and physical properties

d)

None of the Above

4.

When do you take an Antacid ?

a)

When you are Hungry

b)

When the soil is too Acidic

c)

When you have a Gastric problem in your stomach

d)

When the Factory wastes are disposed in waterbodies

e)

None of the Above

5.

A child got stung by a bee. Some of the Elders suggest to add Baking Soda or Lemon Juice. Which one do you think is Appropriate ?

a)

Lemon Juice

b)

Water

c)

Baking Soda

d)

None of the Above

6.

Before Factory wastes are disposed out to Waterbodies, why do they add basic substances ?

a)

So that the Factory wastes decomposes in Waterbodies

b)

Because they have Respect towards them

c)

So that they do not harm the Aquatic animals and Plants

d)

None of the Above

7.

Neutralization is a reaction between

a)

Two acids

b)

Two bases

c)

One Acid and one Base

d)

None of them

8.

What's another name for Antacid ?

(a)  

9.

Substances which are bitter in taste and feel soapy in texture are known as

a)

Bases

b)

Acid

10.

Identify the image.

a)

Fungus

b)

Lichens

c)

Plant

11.

Acids turn ____________ and Bases turn_____________.

a)

Both turn red litmus blue

b)

Blue litmus red, Red litmus blue

c)

Both turn blue litmus red

d)

No change

12.

Change in colour in an acid and a base depends on the type of indicator.

a)

True

b)

False

13.

If an indicator gives changes colour with a acid it does not change colour with an acid.

a)

True

b)

False

14.

Anything with a pH of 7 is a(n)

a)

neutral substance

b)

acid

c)

base

d)

chemical salt

15.

Which of the following is a Mineral Acid?

a)

Citric Acid

b)

Oxalic Acid

c)

Glycolic Acid

d)

Sulphuric Acid

16.

Fruits such as oranges , lemon etc, contain ........................... Acid

a)

Citric

b)

Lactic

c)

Ascorbic

d)

Acetic

17.

If the given solution neither changes the colour of the red litmus nor blue litmus paper , it is ..........................

a)

An Acid

b)

A base

c)

Neutral

d)

Colourless

18.

Hydrochloric Acid solution affect .......................... litmus paper

a)

Red

b)

Blue

c)

Both of these

d)

None of these

19.

Bases turn yellow turmeric paper to ...........................

a)

Green

b)

Red

c)

Pink

d)

Orange

20.

Which method is recommended to dilute an acid

a)

An acid is added to water

b)

Water added to acid

21.

Manure is added , when the soil is too ...................................

a)

Acidic

b)

Basic

c)

Neutral

d)

None of these

22.

Acid can prevent bacteria from growing

a)

True

b)

False

23.

NaOH may be found in drain cleaners and as a component of soaps. Is NaOH an acid or a base?

a)

Acid

b)

Base

c)

Neither (Neutral)

24.

HCl is found in household products, including some toilet bowl cleaners. Is HCl an acid or a base?

a)

Acid

b)

Base

c)

Neither (Neutral)

25.

Is pure water acidic, basic, or neutral?

a)

Acidic

b)

Basic

c)

Neutral

26.

sulfuric acid

a)

HSO3

b)

H2SO3

c)

H2SO4

d)

H3SO4

27.
Mg(OH)2
a)
magnesium hydroxide acid
b)
hydromagnesium acid
c)
magnesium oxygen hydride
d)
magnesium hydroxide