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ACIDS , BASES AND SALTS

Total questions: 35

Worksheet time: 49mins

Name
Class
Date
1.
what happens when a solution of  an acid is mixed with a solution of a base in a test tube?a
a)
temperature of the solution increases 
b)
temperature of the solution decreases
c)
temperature remains constant
d)
no reaction
2.
an aqueous soln turns red lithmus blue . excess addition of which of the following would reverse the change
a)
baking powder
b)
lime
c)
ammonium hydroxide solution
d)
HCL
3.
calcium phosphate is present in tooth enamel its nature is
a)
basic
b)
acidic 
c)
neutral
d)
amphoteric
4.
a sample of soil is mixed with water and allow to settle . The soln turns yellowish orange which of the foll soln will turn the colour to greenish blue 
a)
lemon juice
b)
vinegar
c)
common salt
d)
antacid
5.
If a few drops of concentrated acid accidentally spills over the hand of a student,what should be done
a)
wash the hand with saline solution
b)
wash the hand immediately with plenty of water and apply a soln of sodium hydrogen carbonate
c)
after washing apply soln of sodium hydroxide
d)
neutralise the acid wih a strong alkali
6.
common salt besides being used in kitchen can also be used as the raw material for making
a)
washing soda
b)
calcium salts
c)
plaster of paris
d)
slaked lime
7.
To protect tooth decay we are advised to brush our teeth regurlarly.The toothpaste is
a)
acidic
b)
neutral
c)
basic
d)
corrosive
8.
which of the foll phenomena occur when a small amunt of acid is added to water
a)
ionisation
b)
neutralisation
c)
dilution
d)
formation
9.
which one of the foll can be used as acid-base indicator by  visually impared student 
a)
litmus
b)
turmeric
c)
vanilla essence
d)
petunia leaves
10.
which of the foll substances will not give carbon dioxide on treatment with dilute acid
a)
marble
b)
limestone
c)
baking soda
d)
lime
11.
which of the  foll is acidic in nature
a)
limewater
b)
humanblood
c)
lime juice
d)
antacid
12.
which of the  foll is not mineral acid
a)
HCL
b)
H2SO4
c)
HNO3
d)
citric acid
13.
which of the foll is not a base
a)
NAOH
b)
KOH
c)
NH4OH
d)
C2H5OH
14.
Which of the foll statement is not correct and CO2
a)
all metal carbonates react with acid to give a salt,water and CO2
b)
all metal oxides react with water to give salt and acid
c)
some metals react with acids to give salt and H2
d)
some non metal oxides react with water to form an acid
15.
which of the foll are present in dil aqueous soln of HCL 
a)
H3O+ +CL-
b)
H30+ +OH-
c)
CL+ +OH-
d)
UNIONISED HCL
16.

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)

17.

True or false: a neutral solution has equal amounts of H+ and OH-.

a)

True

b)

False

18.

Is pure water acidic, basic, or neutral?

a)

Acidic

b)

Basic

c)

Neutral

19.
Mg(OH)2
a)
magnesium hydroxide acid
b)
hydromagnesium acid
c)
magnesium oxygen hydride
d)
magnesium hydroxide
20.

A substance is found to have the following characteristics:


Very bitter taste

Feels soapy to the touch

Produces OH- ions when dissolved in water


In what category would the substance be classified?

a)

acid

b)

base

21.

Basic oxide

a)

BaO

b)

P2O5

c)

ZnO

d)

CO2

22.
How are metal oxides formed?
a)
When metals react with oxide.
b)
When metals react with water.
c)
When metals react with air.
d)
When metals react with oxygen.
23.

Which is NOT an amphoteric oxide?

a)

zinc oxide

b)

aluminium oxide

c)

lead (II) oxid

d)

sodium oxide

24.

Which of the followings is an acidic oxide?

a)

SO2

b)

H2O

c)

CO

d)

ZnO

25.

Sulfuric acid reacts with sodium hydroxide to form salt X and water. Name the salt.

a)

sodium sulfate

b)

sodium nitrate

c)

sodium chloride

26.

Potassium carbonate reacts with an acid Y to form potassium nitrate, water and carbon dioxide. What is the acid used for this reaction?

a)

HNO3

b)

H2SO4

c)

HCl

27.

Identify the gas evolved.

a)

Hydrogen

b)

Nitrogen

c)

Carbon dioxide

d)

Oxygen

28.

Do acids and bases conduct electricity?

a)

Only acids conduct electricity

b)

Only bases conduct electricity

c)

Bases and acids conduct electricity

d)

Neither conduct electricity

29.

Common salt beside being used in kitchen can also be used as the raw material for making:

a)

Baking soda

b)

Slaked lime

c)

Washing soda

d)

Bleaching powder

30.

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

a)

Litmus

b)

Turmeric

c)

Methyl Orange

d)

Vanilla essence

31.

(a)   is used to sterilise water in swimming pools?

32.

The process of electrolysis is called (a)   process?

33.
Most foods are 
a)
Acid
b)
Basic
c)
Neutral
d)
salts
34.

What completely ionizes in solution?

a)

Weak acids

b)

Strong acids

c)

Strong Salts

d)

Neutral salts

35.

Phenolophalein turns from clear to pink when the pH turns

a)

acidic

b)

basic

c)

saline

d)

ionic

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