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10ii Acids Bases and Salts

Total questions: 70

Worksheet time: 1hrs 10mins

Name
Class
Date
1.

What are acids?

a)

Acids are substances that taste sweet, can dissolve metals (depending on the type of acid) and are acidic in nature.

b)

Acids are substances that taste sour, can dissolve metals (depending on the type of acid) and are acidic in nature.

c)

Acids are substances that taste sour, can dissolve metals (depending on the type of acid) and are basic in nature.

2.

What are Bases?

a)

Bases are substances that are bitter in taste, feel soapy when touched and are acidic in nature.

b)

Bases are substances that are sour in taste, feel soapy when touched and are basic in nature.

c)

Bases are substances that are bitter in taste, feel soapy when touched and are basic in nature.

d)

Acids are substances that are bitter in taste, feel soapy when touched and are basic in nature.

3.

What are the substances used to test whether another substance is acidic or basic in nature?

a)

Spoon

b)

Bases

c)

Acids

d)

Indicators

4.

Choose all the substances that are acids.

a)

Ant's Sting

b)

Window Cleaner

c)

Tamarind

d)

Curd

5.

Which one of these is an indicator?

a)

Litmus Paper

b)

Orange Juice

c)

Shampoo

d)

Lotion

6.

Where is litmus solution extracted from?

a)

Litmus Paper

b)

Lichen

c)

Oranges

d)

Acids + Bases

7.

What is the process of Acid and Bases mixed together called?

a)

Explosion

b)

Indication

c)

Inflamation

d)

Neutralisation

8.

What can be applied to neutralise an ant's sting?

a)

Milk of Magnesia

b)

Calamaline Solution

c)

Lime Water

d)

Ammonium Hydroxide

9.

What new substance in formed during nuetralisation?

a)

Sugar

b)

Salt

c)

Lemon Juice

d)

Curd

10.

What type of acid helps us digest our food everyday?

a)

Tartaric Acid

b)

Acidic Acid

c)

Hydrochloric Acid

d)

Lactic Acid?

11.

Choose all the Bases in the given choices:

a)

Calcium Hydroxide

b)

Oxalic Acid

c)

Pottasium Hydrodixe

d)

Ascorbic Acid

12.

Fill in the blank.


(a)   turn Blue Litmus into Red.

13.

(a)   turns Red Litmus blue.

14.

Choose all of the following that can be used as indicators.

a)

Litmus Paper

b)

Coffee Powder

c)

Hibiscus (China Rose)

d)

Turmeric

15.

Read the following and answer the question.


A factory releases all it's waste, that is, harmful acids into bodies of water.The waste needs to be released immediately. But, there are organisms living inside the water too. Which one of these is the correct solution?

a)

Clear out all living organisms inside the body of water. Then, release the factory waste.

b)

Release all the waste immediately.

c)

Add Bases to neutralise the waste.

16.
An extremely strong acid would have a pH of...
a)
1
b)
7
c)
9
d)
14
17.
An extremely strong base would have a pH of...
a)
1
b)
7
c)
9
d)
14
18.
A neutral substance would have pH of...
a)
8
b)
7
c)
6
d)
14
19.
If a solution is neither acidic or basic it has a pH of _____________.
a)
1
b)
13
c)
6
d)
7
20.
Indicators change color in the presence of a(n) _______________.
a)
acid or base
b)
buffer
c)
water molecule
d)
ester
21.
A base has a ___________ taste.
a)
bland
b)
salty
c)
bitter
d)
sour
22.

Acid is?

a)

A substance that reacts to metals and carbonates, and has a Ph of below 7.

b)

Often used in drain cleaner.

c)

Something that can only be found in a lab

d)

A bitter tasting substance

23.

A base is

a)

A substance that feels slippery, has a higher Ph than 7, and is often used in drain cleaner.

b)

Has a Ph of below 7 and can react to metal and carbonates

c)

Is only found in a lab

d)

Something water can never be

24.

An indicator is?

a)

A lab manual or guide

b)

Something like litmus paper that can tell you if a substance is acidic or basic

c)

A PS4 game where you pretend to direct traffic

d)

Something only scientists in a lab can use

25.

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

26.

When you neutralize acid with a base you create

a)

a Salt and water

b)

You can not neutralize acid with a base

c)

You create carbon dioxide

d)

A moderate sized explosion

27.

Which of these taste sour?

a)

acids

b)

bases

c)

salts

28.

Which of these feel slippery?

a)

bases

b)

acids

c)

salts

29.

Which of these turn red litmus paper blue?

a)

acids

b)

bases

c)

salts

30.

The pH scale is used to determine the strength of

a)

acids and bases

b)

chemical bonds

c)

electrical charges

d)

particles in a solution

31.

Chemicals formed when an acid and a base combine.

a)

salts

b)

noble gases

c)

metalloids

d)

hydroxides

32.

How would you best describe your science class this year?

a)

awesome

b)

very strange

c)

dull

33.
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
34.
calcium phosphate is present in tooth enamel its nature is
a)
basic
b)
acidic 
c)
neutral
d)
amphoteric
35.
To protect tooth decay we are advised to brush our teeth regurlarly.The toothpaste is
a)
acidic
b)
neutral
c)
basic
d)
corrosive
36.

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

a)

Hydronium ions

b)

Hydrogen ions

c)

hydroxyl ions

d)

ammonium ions

37.

A lighted splint was held over a flask in which a gas was given off. The splint went out with a pop. Which gas was given off?

a)

hydrogen

b)

chlorine

c)

oxygen

d)

ammonia

38.

________________ is an example of an amphoteric oxide

a)

aluminium oxide

b)

carbon dioxide

c)

sulphur dioxide

d)

copper oxide

39.

Found in vinegar

a)

acetic acid

b)

sulphuric acid

c)

tartaric acid

d)

carbonic acid

40.

When acids react with metal carbonate they give -

a)

CO2

b)

Salt

c)

Hydronium ion + Salt

d)

Salt + H2O + CO2

41.

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
42.

Plaster of Paris is obtained by heating:

a)

Gypsum

b)

Limestone

c)

Sodium chloride

d)

Acetic acid

43.
which of the foll is not a base
a)
NAOH
b)
KOH
c)
NH4OH
d)
C2H5OH
44.
which of the foll are present in dil aqueous soln of HCL 
a)
H3O+ +CL-
b)
H30+ +OH-
c)
CL+ +OH-
d)
UNIONISED HCL
45.
which of the foll phenomena occur when a small amunt of acid is added to water
a)
ionisation
b)
neutralisation
c)
dilution
d)
formation
46.
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
47.
sodium hydrogen carbonate when added to acetic acid evolves  a gas .which of the statement is true about the gas evolved
a)
it turns lime water milky
b)
it burns with a pop sound
c)
it changes the soln colorless
d)
it has a pungent smell
48.

Acidic solutions exhibit a higher ratio of H3O+ ions, known as...

a)

neutrons

b)

hydroxide

c)

electrons

d)

hydronium

49.

Which of the following salts does not contain water of crystallisation?

a)

Blue vitreol

b)

Baking soda

c)

Washing soda

d)

Gypsum

50.

Zinc granules on treating with an acid X, forms zinc sulphate (ZnSO4) salt along with the evolution of a gas Y which burns with a pop sound when brought near to a burning candle. Identify the acid X and gas evolved Y.

a)

X-Sulphuric acid and Y- Oxygen gas

b)

X- Hydrochloric acid and Y- Oxygen gas

c)

X- Sulphuric acid and Y- Hydrogen gas

d)

X- Hydrochloric acid and Y- Hydrogen ga

51.

CuO + (X) --> CuSO4 + H2O. Here (X) is-

a)

CuSO4

b)

H2SO4

c)

HCl

d)

HNO3

52.

Number of water of crystallisation molecules present in hydrated copper sulphate is

(a)  

53.

Calcium sulphate hemi hydrate is gypsum

a)

true

b)

false

54.

Chemical formula of baking soda is Na2CO3

a)

true

b)

false

55.

Plaster of Paris hardens by-

a)

giving of CO2

b)

combining with water

c)

changing into CaCO3

d)

giving out water

56.

Which of the following acid is a weak acid?

a)

Hcl

b)

H2SO4

c)

HNO3

d)

CH3COOH

57.

We should never add water to acid because:

a)

The reaction is endothermic.

b)

The reaction is slow.

c)

The reaction is exothermic.

d)

The reaction doesn’t take place

58.

In which of the following bleaching powder is used?

a)

Oxidising agent in chemical industry

b)

For disinfecting drinking water

c)

For bleaching wood pulp in paper factories

d)

All of these

59.

Identify the element –

a) It is a white translucent solid.

b) It readily reacts with water and produces an alkaline solution.

c) It is stored in kerosene

a)

Sodium

b)

Calcium

c)

Aluminium

d)

Phosphorus

60.

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

61.

In terms of acidic strength, which one of the following is in the correct increasing order?

a)

Water < Acetic acid < Hydrochloric acid

b)

Water < Hydrochloric acid < Acetic acid

c)

Acetic acid < Water < Hydrochloric acid

d)

Hydrochloric acid < Water < Acetic acid

62.

When hydrogen chloride gas is prepared on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to -

a)

Absorb the evolved gas

b)

Moisten the gas

c)

Absorb moisture from the gas

d)

Absorb Cl– ions from the evolved gas

63.

Antacid medicine is used for indigestion because

a)

it neutralizes the acid produced

b)

it neutralizes digested food material.

c)

it oxidizes food material

d)

it helps to produce digestive juice

64.

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

a)

yellow

b)

green

c)

orange

d)

red

65.

Chemical formula of Bleaching Powder.

a)

CaOCl2

b)

CaCl2

c)

CaSO4

d)

Ca(OH)2

66.

Common name of CaSO4 2H2O is......

a)

Epsom Salt

b)

Blue vitrol

c)

Gypsum

d)

Plaster of Paris

67.

Chlor-Alkali process ...... are produced

a)

NaOH, Cl2

b)

NaOH, Cl2,H2

c)

NaOH, Cl2, N2

d)

None of these

68.

The difference of molecules of water in gypsum and PoP is

a)

5/2

b)

2b

c)

3/2

d)

½

69.

which of the following is used for dissolution of gold?

a)

Hydrochloric acid

b)

Sulphuric acid

c)

Nitric acid

d)

Aqua regia

70.

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

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