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acid and alkali

Total questions: 39

Worksheet time: 20mins

Name
Class
Date
1.

Is it acid or alkali when the pH is 4 pH

a)

Acid

b)

Alkali

c)

Neutral

2.

Lemon contains acid or alkali or neutral

a)

Acid

b)

Alkali

c)

Neutral

3.

What is an example of neutral

a)

Vinegar

b)

Water

c)

Milk

d)

Drain cleaner

4.

When you get a bee sting, what will you use to make you feel better ?

a)

Water

b)

Baking soda

c)

Milk

d)

Toothpaste

5.

The other name of alkali is basic

a)

True

b)

False

6.

What is the meaning of the above hazard warning symbol?

a)

Corrosive

b)

Explosive

c)

Toxic

d)

Radioactive

7.

Acid in soft drink:

a)

Hydrochloric acid

b)

Sulfuric acid

c)

Acetic acid

d)

Carbonic acid

8.

Reaction between acid and alkali producing salt and water:

a)

Combustion

b)

Neutralization

c)

Precipitation

d)

Decomposition

9.

The color of litmus in acid:

a)

Red

b)

Blue

c)

Purple

d)

Green

10.

What colour does red litmus paper turn when added to an alkali?

a)

Blue

b)

Red

c)

Green

d)

Colourless

11.

Alkali could also be known as

a)

Acid

b)

Weak acid

c)

Base

d)

Maze

12.

True or False: Acids with a low pH and bases with a high pH are considered very dangerous.

a)

True

b)

False

13.

What kind of acid is present in your stomach?

a)

Sulfuric acid

b)

Hydrochloric acid

c)

Citric acid

d)

Nitric acid

14.

Which of the following about properties of acid is not true?

a)

pH less than 7

b)

Tastes bitter

c)

Corrosive

d)

Turns blue litmus paper to red

15.

Which of the following will change the red litmus paper to blue?

a)

Sodium hydroxide

b)

Hydrochloric acid

c)

Sulphuric acid

d)

Nitric acid

16.

Which of the following indicator will show different colour in acid, neutral and alkali?

a)

Phenolphtalein

b)

Universal indicator

c)

Methyl orange

d)

Litmus paper

17.

Sodium hydroxide is used

a)

to make fertilisers.

b)

to make battery.

c)

to cure gastritis.

d)

to make detergent.

18.

Hydrochloric acid + Sodium hyroxide  →\rightarrow   ____________ + Water

a)

Sodium sulphate

b)

Sodium chloride

c)

Sodium nitrate

19.

Nitric acid + __________  →\rightarrow  Sodium nitrate + Water

a)

Aluminium oxide

b)

Magnesium hydroxide

c)

Sodium hydroxide

20.

The technique used in neutralisation is called

a)

filtration.

b)

titration.

21.

State the taste of this fruit?

a)

Tastles

b)

Bitter

c)

Sour

d)

Sweet

22.

What is the example of alkaline substance

a)

bitter gourd

b)

lemon juice

c)

cooking oil

d)

mineral water

23.

Which of the food has the same taste as the sweets?

a)

Chocolate

b)

Salted egg

c)

Baking powder

d)

Soda bicarbonate

24.

Name the indicator used to determine the chemical properties of toothpaste and pineapple juice?

a)

Red and Blue litmus paper

b)

Filter paper

c)

Colour paper

d)

Petri dish

25.

Which of the properties of alkaline substance is NOT TRUE?

a)

taste bitter

b)

slippery

c)

turn red litmus paper to blue

d)

turn blue litmus paper to red

26.

Which of the following changes the blue litmus paper to red?

a)

Potato

b)

Soup

c)

Brinjal

d)

Ice cream

27.

Which of the following can be used to replace tamarin in cooking?

a)

Papaya

b)

Long bean

c)

Salted egg

d)

Tomato

28.

Which substance is correctly matched?

a)

Salted fish - Acidic

b)

Soursop - Acidic

c)

Vinegar - Alkaline

d)

Body wash - Neutral

29.

Substance X does not changes blue or red litmus paper. Which of the following is Substance P?

a)

Medicine

b)

Shampoo

c)

Salt solution

d)

Coffee

30.

Teacher has run out of litmus paper. Which of the following indicator can be used to replace the litmus paper?

a)

Chili

b)

Soy source

c)

Baking powder

d)

Hibiscus extract

31.

The pH of pure water

a)

5.6

b)

7.0

c)

8.1

d)

0.0

32.

Acid in our stomach:

a)

Hydrochloric acid

b)

Sulfuric acid

c)

Acetic acid

d)

Carbonic acid

33.

Which substance is alkali?

a)

Toothpaste

b)

Vinegar

c)

Lemon juice

d)

Soft drink

34.

The color of universal indicator in pure water:

a)

Red

b)

Blue

c)

Purple

d)

Green

35.

Acids taste .....

a)

sour

b)

bitter

c)

sweet

d)

umami

36.

Indigestion can be treated by drinking ....

a)

water

b)

antacid

c)

vinegar

d)

sodium hydroxide

37.

Rain water is slightly acidic. What is its pH?

a)

1.0

b)

5.6

c)

7.0

d)

8.2

38.

Reaction between acid and alkali producing salt and water:

a)

Combustion

b)

Neutralization

c)

Precipitation

d)

Decomposition

39.

Which substance is an acid?

a)

Water

b)

Bleach

c)

Orange juice

d)

Washing powder

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