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Acids Bases and Salts 29 Aug 2022

Total questions: 50

Worksheet time: 31mins

Name
Class
Date
1.

Which of the following values would represent the pH of a strong base?

a)

1

b)

8

c)

7

d)

13

2.

Which of the following is acidic in nature?

a)
limewater
b)
humanblood
c)
lime juice
d)
antacid
3.

A substance has a pH value of 8. It is most likely to be what?

a)

Strong acid

b)

Weak acid

c)

Strong base

d)

Weak base

4.

Which indicator is colourless in acid and pink in alkali?

a)

Litmus

b)

Phenolphthalein

c)

Universal Indicator

d)

Methyl Orange

5.

1. An example of an acidic oxide is:

a)

MgO

b)

CO2

c)

BaO

d)

Na2O

6.

________________ is an example of an amphoteric oxide

a)

aluminium oxide

b)

carbon dioxide

c)

sulphur dioxide

d)

copper oxide

7.

Found in vinegar

a)

acetic acid

b)

sulphuric acid

c)

tartaric acid

d)

carbonic acid

8.

When acids react with metal carbonate they give -

a)

CO2

b)

Salt

c)

Hydronium ion + Salt

d)

Salt + H2O + CO2

9.

After a neutralization reaction takes place, what is the pH of the solution?

a)

1

b)

7

c)

14

d)

there is no pH

10.

Which formula is a salt?

a)

KOH

b)

KCl

c)

CH3OH

d)

CH3COOH

11.

Which pH value indicates the most basic solution?

a)

7

b)

8

c)

3

d)

11

12.

When tested, a solution turns red litmus blue. What does this indicate?

a)

H+ ions > OH- ions

b)

H+ ions < OH- ions

c)

H+ ions = OH- ions

13.

The pH of a 0.1M CH3COOH solution is

a)

less than 1

b)

greater than 1, but less than 7

c)

equal to 7

d)

greater than 7 but less than 14

14.

When the pH of a solution goes from 3 to 4, the concentration of H+ ions

a)

decreases by a factor of 10

b)

decreases by a factor of 1

c)

increases by a factor of 10

d)

increases by a factor of 1

15.
An extremely strong acid would have a pH of...
a)
1
b)
7
c)
9
d)
14
16.
An extremely strong base would have a pH of...
a)
1
b)
7
c)
9
d)
14
17.
A neutral substance would have pH of...
a)
8
b)
7
c)
6
d)
14
18.
Indicators change color in the presence of a(n) _______________.
a)
acid or base
b)
buffer
c)
water molecule
d)
ester
19.
 Which of the following is an acid?
a)
shampoo
b)
baking soda
c)
orange juice
d)
water
20.

Neutralization is a reaction between

a)

Two acids

b)

Two bases

c)

One acid and one base

d)

None of them

21.

Milk of magnesia is used as an

a)

Chocolate

b)

Soup

c)

antacid

d)

None of them

22.

Lemon drop turns

a)

Red litmus into blue

b)

No reaction

c)

Blue Litmus into red

d)

All of them

23.

Products of a neutralization reaction are always:

a)

an acid and a base

b)

an acid and a salt

c)

a salt and water

d)

a salt and a base

24.

Name the acid present in our stomach.

a)

Sulphuric acid

b)

Hydrochloric acid

c)

Nitric acid

d)

Carbonic acid

25.

Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions, respectively are:

a)

pink and colourless

b)

blue and red

c)

red and blue

d)

colourless and pink

26.

How does acid tastes

a)

Sweet

b)

Bitter

c)

Salty

d)

Sour

27.

Which acid is present in orange

a)

Tartaric acid

b)

Malic acid

c)

Citric acid

d)

Acitic acid

28.

How does base tastes

a)

Sour

b)

Salty

c)

Bitter

d)

Sweet

29.

If the soil is acidic what we should do to make it neutral

a)

Add salt

b)

Add acid

c)

Add base

d)

Add sugar

30.

Which is not a natural indicator

a)

Litmus

b)

Turmeric

c)

China rose

d)

Phenoptyalin

31.

Which is a natural indicator

a)

Phenoptyalin

b)

Sulpher

c)

Litmus

d)

Naoh

32.

If the ph value is 5 what is the substance

a)

Acid

b)

Base

c)

Neutral

d)

Sweet

33.

Which of the following is not a dibasic acid?

a)

Acetic acid

b)

Sulphurous acid

c)

Sulphuric acid

d)

Carbonic acid

34.

Acids which dissociate almost completely in aqueous solutions are known as:

a)

Dilute acids

b)

Strong acids

c)

Weak acids

d)

Concentrated acids

35.

A universal indicator is a:

a)

Solution of phenolphthalein

b)

Solution of methyl orange

c)

solution of methyl orange and phenolphthalein

d)

mixture of many indicators

36.

Acid used as an eyewash is:

a)

Formic acid

b)

Phosphoric acid

c)

Oxalic acid

d)

Boric acid

37.

Acids react with active metals to liberate:

a)

Oxygen

b)

Carbon dioxide

c)

Nitrogen

d)

Hydrogen

38.

An alkali is a compound which when dissolved in water yields:

a)

Hydronium ions

b)

Hydrogen ions

c)

hydroxyl ions

d)

ammonium ions

39.

Which indicator is colourless in acid and pink in alkali?

a)

Litmus

b)

Phenolphthalein

c)

Universal Indicator

d)

Methyl Orange

40.

What is formed when zinc reacts with sodium hydroxide?

a)

Zinc hydroxide and sodium

b)

Sodium zincate and hydrogen gas

c)

Zinc oxide and hydrogen gas

d)

Sodium zincate and water

41.

Which one of the following will turn blue litmus red?

a)

Vinegar

b)

Lime water

c)

Baking soda solution

d)

Washing soda solution

42.

Which one of the following can be used as an acid -base indicator by a visually impared student?

a)

Litmus

b)

Turmeric

c)

Vanilla essence

d)

Petunia leaves

43.

Which of the following is not a mineral acid?

a)

Hydrochloric acid

b)

Citric acid

c)

Sulphuric acid

d)

Nitric acid

44.

Colour of methyl orange indicator in acidic medium is......

a)

yellow

b)

green

c)

orange

d)

red

45.
Pure water has a pH of 7. Pure water _______.
a)
is a base
b)
is a neutral substance
c)
could be either an acid or a base
d)
is an acid
46.
A base has a _________________.
a)
sour taste
b)
positive ion
c)
slippery feel
d)
pH of 5
47.

organic compound that changes color in acids and bases

a)

indicator

b)

pH

c)

buffer

d)

salt

48.

If a solution is basic which ion will be more present?

a)

H+

b)

K+

c)

OH-

d)

H-

49.

Which property is not associated with acids?

a)

Sour taste

b)

strong acids can burn you

c)

turns litmus paper blue

d)

reacts with metals

50.

Vinegar, fruit juice, and cola are examples of:

a)

salts

b)

neutral substances

c)

bases

d)

acids

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