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chemistry class 10

Total questions: 84

Worksheet time: 49mins

Name
Class
Date
1.

Which of the following sets of elements do not belong to the same group?

a)

Na,K,Rb

b)

P,S,CI

c)

C,Si,Ge

d)

F,CI,Br

2.

Which of the following belongs to group 18?

a)

I

b)

Rb

c)

Sr

d)

Ar

3.

Which of the following has largest atomic size?

a)

O

b)

C

c)

Be

d)

F

4.

According to IUPAC recommendations, the number of groups in the long form of the periodic table is:-

a)

7

b)

18

c)

16

d)

9

5.

Which is not true about the noble gases?

a)

They are radioactive in nature

b)

  • They are non metallic in nature

c)

  • Xenon is the most reactive among these

d)

 They exist in atomic form

6.

The least metallic element of group I is:-

a)

Lithium

b)

  • Potassium

c)

Caesium

d)

Sodium

7.

Which of the following pairs of elements does not belong to same group?

a)

Cl

.

Br

b)

N. P

c)

Al, Si

d)

Mg, Ca

8.

Which of the following statement is not correct about the trends when going from left to right across the periodic table?

a)

The number of valence electrons increases

b)

the oxides become more acidic

c)

The elements become less metallic in nature

d)

The atoms lose their electrons more easily

9.

Which of the following has the lowest number of electrons in the valency shell?

a)

O

b)

B

c)

N

d)

C

10.

Formula of bleaching powder

a)

CaSO4

b)

Na2CO3

c)

NaHCO3

d)

CaOCl2

11.

Bases turn phenolphthalein to which colour

a)

Red

b)

Yellow

c)

Pink

d)

No change

12.

Brine solution is called

a)

MgCl2 solution

b)

Na2SO4 solution

c)

CuSO4 solution

d)

NaCl solution

13.

Bleaching powder acts as

a)

Oxidizing agent

b)

Reducing agent

c)

Decolourising agent

d)

1&3

14.

Formula of baking soda

a)

CaSO4

b)

Na2CO3

c)

NaHCO3

d)

CaOCl2

15.

PH value of lemon juice is

a)

4.4

b)

7.4

c)

2.5

d)

5.8

16.
Identify this type of reaction: 
Al (s) + HCl (aq) → AlCl3 (aq) + H2 (g)
a)
Precipitation
b)
Synthesis
c)
Combustion
d)
Single Replacement
17.
What is the formula for magnesium chloride?
a)
MgCl
b)
Mg2Cl
c)
MgCl2
d)
Mg(ClO3)2
18.
Name the following ionic compound: BeCl2
a)
beryllium chlorine
b)
beryllium II chloride
c)
beryllium chloride
d)
beryllium dichloride
19.
Which of the following is a transition metal?
a)
Magnesium
b)
Aluminium
c)
Iron
d)
Neon
20.
Which of the following is an example of an element?
a)
Water
b)
Carbon 
c)
Oil
d)
Carbon Dioxide 
21.
Ionic Bonding involves...
a)
The transfer of protons
b)
The transfer of nuetrons 
c)
The transfer of electrons
d)
None Of the above
22.
What is the number of valence electrons for Beryillum?
a)
1
b)
4
c)
2
d)
7
23.

How many carbons are there in the longest chain?

a)

5

b)

3

c)

1

d)

6

24.

Which of these has the formula C60?

a)

graphite

b)

diamond

c)

fullerene

d)

none of these

25.

Which of the following is the molecular formula of cyclobutane?

a)

C4H10

b)

C4H6

c)

C4H8

d)

C4H4

26.

-Methane is a major constituent of

a)

CNG

b)

Bio-gas

c)

Natural Gas

d)

All the above

27.

Covalent compound

a)

has low melting and boiling point

b)

is generally poor conductors of electricity

c)

has weak inter-molecular forces

d)

All of the above

28.

Prefix 'prop' is used when no. of carbon are

a)

1

b)

3

c)

4

d)

5

29.

Which of the following is/are alkyne?

a)

C3H4

b)

C4H8

c)

C5H12

d)

C6H10

30.

Compounds that are composed of the same number and type of atoms but have them arranged in different ways are ___________.

a)

isomers

b)

isotopes

c)

polymers

d)

alkanes

31.

General formula of Alkane is

a)

CnH2n+4

b)

CnH2n+2

c)

CnH2n

d)

CnH2n-2

32.

Atomic No. of Carbon,No. of Electron,No. of Proton,No of electron is

a)

12

b)

7

c)

6

d)

4

33.

Benzen Formula is

a)

C6H12

b)

C6H8

c)

C8H6

d)

C6H6

34.

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

35.

Water is?

a)

Always an acd

b)

Always a base

c)

Is the most common base, and acid in the world

d)

Always is neutral that is why it is safe to drink

36.

A substance with a ph of higher that 7.5 is a?

a)

Home dog doggity

b)

Base

c)

Acid

d)

Salt

37.

Acid can prevent bacteria from growing

a)

True

b)

False

38.

A substance with a ph of lower than 7 is a

a)

Acid

b)

True OG

c)

Base

d)

Salt

39.

A substance is found to have the following characteristics:


Very bitter taste

Feels slippery to the touch

Produces OH- ions when dissolved in water


In what category would the substance be classified?

a)

acid

b)

base

c)

enzyme

d)

fatty acid

40.

HF is...

a)

an acid

b)

a base

c)

a salt

d)

an ionic compound

41.
Releases hydrogen in an aqueous solution.
a)
base
b)
strong base
c)
acid
d)
weak base
42.
The pH of a solution is tested, and it is found to be a basic solution. Of the following choices, what could the pH have been?
a)
3
b)
9
c)
7
d)
5
43.
Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?
a)
strongly acidic
b)
slightly acidic
c)
strongly basic
d)
slightly basic
44.
A cation is a ____ ion.
a)
negative
b)
positive
c)
neutral
d)
ficticious
45.
Nitrogen will form which of the following ions?
a)
N
b)
N-3
c)
N-5
d)
N+5
46.
Nitrogen will form which of the following ions?
a)
N
b)
N-3
c)
N-5
d)
N+5
47.
Why don't noble gases normally form chemical bonds?
a)
They have only 2 valence electrons
b)
Their outer level electrons are empty
c)
They have 8 neutrons
d)
They have a full valence electron shell
48.
Why don't noble gases normally form chemical bonds?
a)
They have only 2 valence electrons
b)
Their outer level electrons are empty
c)
They have 8 neutrons
d)
They have a full valence electron shell
49.
How many valence electrons in this structure?
a)
6
b)
5
c)
4
d)
7
50.
Which of these is a property of metals?
a)
It's malleable
b)
It can't conduct electricity
c)
They are used in food
d)
It's very brittle
51.

All of the following would classify an element as a metal except?

a)

Dull

b)

Luster

c)

Malleable

d)

Ductile

52.

Which metal is the poor conductor of heat.

a)

Silver

b)

Potassium

c)

Mercury

d)

Iron

53.

The metal which can be cut with knife.

a)

Iron

b)

Silver

c)

Sodium

d)

Magnisium

54.
complete the word equation, Iron + Oxygen goes to
a)
Rust
b)
Iron Oxide
c)
Iron Dioxide
d)
Iron fluoride
55.

Name the metal which is in liquid state.

a)

Iron

b)

Mercury

c)

Zinc

d)

Aluminium

56.
What is NOT a property of metals
a)
brittle
b)
ductile
c)
malleable
d)
conductor
57.
Brass is a mixture of 
a)
lead and tin 
b)
copper and zinc 
c)
copper and tin 
58.

metals does not liberate h2 gas with hno3 as it is a very -

(a)  

59.

what is galvanization ?

a)

applying a coating of zinc to prevent form corrosion

b)

applying a coating of aluminium to prevent form oxidation

c)

applying a coating of iron to prevent form corrosion

d)

applying a coating of both aluminium and zinc to prevent form corrosion

60.

Before burning in air, the magnesium ribbon is cleaned by rubbing with a sand paper to:

a)

Make the ribbon surface shinier

b)

Remove the layer of magnesium oxide from the ribbon surface

c)

Remove the layer of magnesium carbonate from the ribbon surface

d)

Remove the moisture from the ribbon surface

61.

A substance which oxidized itself and reduces other is known as :

a)

Oxidizing agent

b)

Reducing agent

c)

Both of these

d)

None of these

62.

The reaction in which two compounds exchange their ions to form two new compounds is

a)

A displacement reaction

b)

A decomposition reaction

c)

An isomerization reaction

d)

A double displacement reaction

63.

Rusting of an iron is an example of

a)

Reduction

b)

Ionization

c)

Oxidation

d)

Dissociation

64.

The displacement reaction between iron (III) oxide and a metal X is used for welding the rail tracks. Here X is:

a)

Copper granules

b)

Magnesium ribbon

c)

Sodium pellets

d)

Aluminium dust

65.

The given diagram of experimental set-up is used to carry out:

a)

Distillation of water

b)

Purification of water

c)

Electrolysis of water

d)

Hydrolysis

66.

When ferrous sulphate is heated strongly it undergoes decomposition to form ferric oxide as a main product accompanied by a change in colour from:

a)

Blue to green

b)

Green to blue

c)

Green to brown

d)

Green to yellow

67.

Rusting of iron involves a chemical reaction which is a combination of:

a)

Reduction as well as combination reactions

b)

Oxidation as well as combination reactions

c)

Reduction as well as displacement reactions

d)

Oxidation as well as displacement reactions

68.

What does the number 3 represent in 4NH3?

a)

Subscript

b)

Superscript

c)

Coefficient

69.

Which reactant is missing from the equation shown?

(What should go in the place of the "X"?)

a)

One hydrogen atom.

b)

Three hydrogen atoms.

c)

Four oxygen atoms.

70.

To balance an equation you should:

a)

ONLY change subscripts.

b)

ONLY change coefficients.

c)

Change BOTH subscripts and coefficients.

71.

Is this equation balanced?

a)

Yes

b)

No

72.

A chemical reaction has taken place in which of the following process?

a)

(i) Ice melts into water

b)

(ii) A wet shirt got dried in sunlight

c)

(iii) A brown layer is formed over iron rod kept in air

d)

(iv) Sugar getting dissolved in water

73.

What is the color of ash formed in this experiment ?

a)

Black

b)

Brown

c)

White

d)

Yellow

74.

An element X on exposure to moist air turns reddish-brown and a new compound Y is formed. The substance X and Y are

a)

(a) X = Fe, Y = Fe2O3

b)

(b) X = Ag, Y = Ag2S

c)

(c) X = Cu, Y = CuO

d)

(d) X = Al, Y = Al2O3

75.

Calcium oxide reacts with water to form calcium Hydroxide. Which type of reaction is this?

a)

(i) Combination and endothermic reaction

b)

(ii) Combination and exothermic reaction

c)

(iii) Decomposition and Endothermic reaction

d)

(iv) Decomposition and exothermic reaction

76.

On thermal decomposition of lead nitrate, nitrogen dioxide gas is evolved. How it presence can be verified?

a)

(i) It will turn lime water milky

b)

(ii) Rotten egg odour

c)

(iii) Brown fumes can be observed

d)

(iv) Reddish fume is observed

77.

Dobereiner tried to arrange the elements with similar properties into group. So, he called the groups “_______”

Octaves

a)

Octaves

b)

Triad

c)

Metals

d)

Non-Metals

78.
How many neutrons are in a Gold atom?
a)
79
b)
196
c)
118
d)
275
79.
How many electrons does a Copper atom have?
a)
63
b)
29
c)
92
d)
34
80.
How are elements on the periodic table arranged by?
a)
in alphabetic order
b)
simular physical & chemical properties
c)
their symbols
d)
Just simular physical properties
81.
What element is will have the most similar physical and chemical properties to the element Lithium (Li)?
a)
Sodium (Na)
b)
Magnesium (Mg)
c)
Beryllium (Be)
d)
Calcium (Ca)
82.
a)
Periods
b)
Groups
83.
a)
Periods
b)
Groups
84.
SULFUR
a)
Su
b)
S
c)
Sf
d)
Si

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