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Acids Bases and Salts

Total questions: 15

Worksheet time: 8mins

Name
Class
Date
1.

Curd, lemon juice, orange juice and vinegar taste sour because they contain ____________

a)

neutral

b)

acids

c)

salts

d)

bases

2.

The word acid comes from the ________ word _________ which means __________

a)

Greek word acid which means salty

b)

Latin word acere which means sour

c)

Persian word acide which means bitter

d)

French word acer which means sweet

3.

Substances which taste bitter and feel soapy on touching are known as

a)

Acids

b)

Bases

c)

Salts

d)

Neutral

4.

Special type of substances are used to test whether a substance is acidic or basic. These substances are known as __________

a)

Litmus paper

b)

China rose

c)

Turmeric

d)

Indicators

5.

The most commonly used natural indicator is _________ it is extracted from_________

a)

China rose extracted from China rose plant

b)

Turmeric extracted from turmeric plant

c)

Litmus extracted from lichens

d)

phenolphthalein extracted from lichens

6.

The solutions which do not change colour of either red or blue litmus are known as __________ solutions.

a)

neutral

b)

acidic

c)

basic

d)

salty

7.

china rose indicator turns acidic solutions to_________

a)

dark pink

b)

green

c)

yellow

d)

red

8.

china rose indicator turns basic solutions to _________

a)

dark pink

b)

green

c)

yellow

d)

red

9.

when a solution is basic phenolphthalein gives a _________ colour.

a)

blue

b)

yellow

c)

pink

d)

red

10.

Phenolphthalein remains __________ when a solution is acidic.

a)

blue

b)

yellow

c)

pink

d)

colourless

11.

In neutralisation reaction a new substance is formed. This is called ________

a)

acid

b)

base

c)

salt

d)

sugar

12.

The reaction between an acid and base is known as ______________. ___________ and _____are produced in this process with the evolution of heat.

choose more than one option

a)

neautralisation

b)

phenolphthalein

c)

water

d)

salt

13.

The following reaction is a example of what?

Hydrochloric acid [HCI] + Sodium hydroxide [NaOH] = Sodium chloride [NaCL] + Water

a)

litmus extraction

b)

phenolphthalein

c)

neutralisation

d)

acid rain

14.

To relieve indigestion, we take an antacid such as _______________________, which contains magnesium hydroxide.

a)

milk of magnesia

b)

magnesium hydroxide

c)

milk of hydroxide

d)

calcium hydroxide

15.

the effect of ant bite {formic acid} can be neutralised by rubbing ___________________ which contains zinc carbonate.

a)

slaked lime

b)

milk of magnesia

c)

quick lime

d)

calamine lotion