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9th icse chemistry SA 2

Total questions: 110

Worksheet time: 2hrs 50mins

Name
Class
Date
1.

A group of atoms having negative or positive charge is called ______.

a)

ion

b)

molecule

c)

atom

d)

radical

2.

What are the constituent elements of aluminium phosphate?

a)

Phosphorus

b)

Oxygen

c)

Aluminium

d)

All of the above

3.

The correct symbol for copper is ______.

a)

Co

b)

Cl

c)

Cr

d)

Cu

4.

Which of the following forms an electropositive trivalent ion?

a)

Aluminium

b)

Lithium

c)

Nickel

d)

Cobalt

5.

The symbol of ammonium radical is ______.

a)
b)
c)
d)
6.

How many electrons are present in a nitride ion?

a)

6

b)

5

c)

8

d)

10

7.

What is the formula of the compound formed between calcium and oxygen?

a)
b)
c)
d)
8.

The correct symbol of Chlorate is...

a)


ClO2−ClO_2^-

b)

ClO−ClO^-

c)

ClO3−ClO_3^-

d)

ClO4−ClO_4^-

9.

What is the symbol of Magnesium?

a)

Mn

b)

Mg

c)

Me

d)

Ma

10.

A positive radical is also called (a)   .

11.

Relative molecular mass(RMM) of an element/......... is the ........ of times one....... of the substance is heavier than ....... the mass of an atom of carbon.(C12).

a)

symbol,number,

atom,1/14

b)

compound,number,molecule,1/10

c)

compound,number,molecule,1/12

d)

compound,number,atom,1/12

12.

Relative atomic mass(RAM) of an element is the ............of times one ....... of an element is ......... than 1/12 the mass of an atom of carbon(C12).

a)

number,atom,

heavier

b)

number,molecule,

heavier

c)

number,molecule,

lighter

d)

number,atom,

lighter

13.

What are the limitations of chemical equations?

(You can select more than 1 option for this question.)

a)

It does not tells us about the concentration of both reactants and products.

b)

It does not tell us the chemical nature of reactants and products.

c)

It does not provide information about the speed of the reaction.

d)

It does not tells us the direction of the reaction.

14.

What is the chemical name of MgSO4.7H2O ?

a)

Washing soda

b)

Epsom Salt

c)

Glauber's salt

d)

Rock salt

15.

What is the valency of Calcium and Aluminium?

a)

Valency of Calcium is 2+ and Aluminium is 4+

b)

Valency of Calcium is 2- and Aluminium is 1+

c)

Valency of Calcium is 2+ and Aluminium is 3+

d)

Valency of Calcium is 3+ and Aluminium is 2+

16.

The valency of all metals and hydrogen is considered

a)

Negative

b)

Positive

c)

Zero

d)

None of the options

17.

It represents a specific element or one atom of an element.

a)

Symbol

b)

Valency

c)

Compound

d)

None of the options

18.
Which particles are transferred when a metal atom reacts with a non-metal atom?
a)
Protons
b)
Neutrons
c)
Electrons
19.

The oxidation number of 'S' in H2SO4 is............
[ Hint: oxidation number of H = +1 ; O =  −-  2 ]

a)

+ 2

b)

+3

c)

+6

d)

 −-  6

20.

When dilute hydrochloric acid is added to sodium thiosulphate and heated, ................... is formed.

a)

a white precipitate

b)

a yellow precipitate

c)

a brown precipitate

d)

a yellow coloured gas

21.

Mg ribbon, Mg powder, marble pieces, marble powder, dilute HCl, and conc: HCl are given to you. Which materials will you select to get more CO2 gas in less time?

a)

Magnesium powder and Conc. HCl

b)

Magnesium pieces and Conc. HCl

c)

Marble powder and dilute HCl

d)

Marble powder and Conc. HCl

22.

In the decomposition reaction of H2O2(Hydrogen peroxide), the negative catalyst used is

a)

Sulphuric acid

b)

Manganese dioxide

c)

Phosphoric acid

d)

Spongy iron

23.

2Na + Cl2 --> 2NaCl . Here Chlorine is the

a)

Oxidised atom

b)

Oxidising agent

c)

Reducing agent

d)

None of these

24.

xAl + yO2 --> 2Al2O3 is a balanced equation. Then the values of x and y are

a)

x = 2 and y = 4

b)

x = 4 and y = 3

c)

x = 3 and y = 4

d)

x = 2 and y - 2

25.

The valency of an element Y is 2 and the formula of the compound is X2Y3. What is the valency of X?

a)

2

b)

1

c)

3

d)

0

26.

The type of chemical bond in a nitrogen molecule is

a)

Ionic bond

b)

Triple covalent bond

c)

Double covalent bond

d)

Single covalent bond

27.

Which of the following is not a property of ionic bonding?

a)

Found only in the solid state.

b)

Conducts electricity in molten and aqueous states

c)

Soluble in organic solvents

d)

High melting and boiling points

28.

Which of the following electronic configurations is a stable structure?

a)

2, 8, 6

b)

2, 8, 8

c)

2, 8, 7

d)

2. 7

29.

The mass number of an element is the number of

a)

Electrons and neutrons

b)

Protons

c)

Protons and electrons

d)

Protons and neutrons

30.

An atom is electrically neutral because of the presence of equal number of

a)

Protons and neutrons

b)

Protons and electrons

c)

Electrons and neutrons

d)

All of these

31.

The atomic number of an element is 17 and its mass number is 35,

a)

it has 18 protons

b)

has 17 neutrons

c)

has 18 neutrons

d)

has 18 electrons

32.

CaCl2 is an example of what type of bond?

a)

Covalent

b)

Metallic

c)

Ionic

33.

What category of element usually forms a positive ion?

a)

Metals

b)

Nonmetals

c)

metalloids

d)

Noble gases

34.

Which is the correct Lewis Structure for oxygen?

a)
b)
c)
d)
35.

What do positive ions tend to do?

a)

lose electrons

b)

gain electrons

c)

lose protons

d)

gain protons

36.

What happens when magnesium loses 2 electrons?

a)

It stabilizes to a net charge of 0

b)

It turns into an atom

c)

It becomes negatively charged

d)

It becomes positively charged

37.

Predict the bond between Mg and Cl

a)

covalent

b)

ionic

c)

metallic

d)

none of the above

38.

What is the name of Group 1?

a)

Halogens

b)

Noble gases

c)

Alkali metals

d)

Alkali earth metals

39.

What is the biggest group on the periodic table

a)

metals

b)

non metals

c)

metalloids

d)

halogens

40.

How many rows on the periodic table?

a)

6

b)

7

c)

8

d)

9

41.

Which is NOT a change that has been made to this table to form the modern periodic table?

a)

The noble gases have been added to the modern periodic table.

b)

The elements in the modern table are now arranged by atomic mass.

c)

The elements in the modern periodic table are now arranged by number of protons.

d)

The gaps in Mendeleev’s periodic table have been filled as elements have been discovered.

42.

Which statement correctly describes an element based on its position in the periodic table?

a)

Element X is a halogen that will form a negative anion by losing electrons.

b)

Element Y is a noble gas that will form positively charged ions called cations.

c)

Element Z is an alkali metal that is very reactive.

d)

Element W is a noble gas that does not readily bond with other elements.

43.

Silicon is a metalloid that is a key ingredient of computer chips. What property of silicon makes it essential for computers?

a)

Silicon conducts heat extremely well.

b)

Silicon is highly reactive with other elements.

c)

Silicon does not react at all with other elements.

d)

Silicon conducts electricity, but not as well as metals.

44.

Halogens are in column 17 (VIIA) of the periodic table. What property do they share?

a)

each element has seven protons

b)

each element has seven electrons

c)

each element has seven valence electrons

d)

each element has an atomic mass of seven

45.

What property do the alkali metals share?

a)

Each element has one proton.

b)

Each element has one electron.

c)

Each element has one valence electron.

d)

Each element has an atomic mass of one.

46.

The element placed below hydrogen in group 1

a)

Na

b)

Li

c)

K

d)

F

47.

These elements located on the "stair-step" line are sometimes called "semiconductors."

a)

Metals

b)

Nonmetals

c)

Metalloids

d)

Groups

48.
Why is water NOT on the periodic table?
a)
It is naturally occuring
b)
It is a compound, not an element
c)
It exists as a solid, a liquid, and a gas
d)
Its chemical formula doesn't fit
49.
Calcium is in group number______.
a)
Group 2
b)
Group 3
c)
Group 4
d)
Group 7
50.
The atoms pictured in yellow are considered __. 
a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
51.

Mendeleev realized that chemical characteristics repeated _____

a)

at odd numbered intervals

b)

every seven elements

c)

every eight elements

d)

every nine elements

52.
Which is a halogen?
a)
Helium
b)
Chlorine
c)
Oxygen
d)
Neptune
53.

Each column (Vertical) is called

a)

Period

b)

Column

c)

Group

d)

Cohort

54.

Each row (Horizontal) is called _______

a)

Column

b)

Family

c)

Semi-colon

d)

Period

55.

Which type of elements are NOT solid at room temperature?

a)

Metals

b)

Non-metals

c)

Metalloids

d)

All of them

56.

Which elements are GREAT conductors of electricity?

a)

Metals

b)

Non-metals

c)

Metalloids

d)

None of them

57.

Elements are organized by similar _________.

a)

Looks

b)

Proportions

c)

Properties

d)

Interests

58.

What are the three types of elements?

a)

Metals

b)

Plastics

c)

Non-Metals

d)

Metalloids

59.

As you move from left to right and top to bottom, atomic mass ________

a)

Increases

b)

Decreases

c)

Stays the same

60.
Which type of water makes soaps not work? 
a)
Hard 
b)
Soft 
61.
Which types of compounds dissolve easily in water?
a)
Polar and Nonpolar
b)
Polar and Ionic
c)
Nonpolar and Ionic
d)
Covalent and Nonpolar
62.
Water is a universal solvent because it...
a)
It can be found anywhere
b)
It freezes when it gets cold
c)
floats when frozen
d)
Dissolves most substances
63.
Attractions between water molecules are called
a)
Covalent bonds
b)
Ionic bonds
c)
Polar bonds
d)
Hydrogen bonds
64.
What is an example of something that dissolves in water
a)
Yourself
b)
Sugar
c)
A rock
d)
A boat
65.
A solvent is...
a)
substance into which the solute dissolves
b)
a compound being dissolved
c)
a substance that does not dissolve
d)
None of the above
66.
Pure water has a
a)
Neutral pH 
b)
Negative pH
c)
Positive pH
d)
Both Negative and Positive pH
67.

Convert 275K into celcius

(a)  

68.

Assertion: Zinc reacts with sulphuric acid to form zinc sulphate and hydrogen gas and it is a displacement reaction.

Reason: Zinc reacts with oxygen to form zinc oxide.

a)

Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.

b)

Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.

c)

Assertion is true but the reason is false.

d)

The statement of the Assertion is false but the Reason is true.

69.

CaO + H2O --> Ca(OH)2

This is an example of

a)

Combination reaction

b)

Decomposition reaction

c)

Displacement reaction

d)

None of the above

70.

(a)   of electrons is oxidation.

71.

The oxidizing agent in the following reaction is (a)  

CuO + H2 -->Cu + H2O

72.

Which of the following is an element?

a)

potassium chloride (KCl)

b)

water (H2O)

c)

carbon (C)

d)

calcium carbonate (CaCO3)

73.

Identify the following chemical reaction.

Pb + FeSO4 ----> PbSO4 + Fe

a)

Synthesis (or combination)

b)

Decomposition

c)

Single displacement

d)

Double displacement

74.

What type of reaction is the following:
Zn + 2HCl −> ZnCl2+H2Zn\ +\ 2HCl\ ->\ ZnCl_2+H_2

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

75.

The diagram shows

a)

a chemical change

b)

a physical change

c)

none of the above

76.

The equation is balanced...

a)

True

b)

False

77.

Balance and determine the coefficients

a)

1, 1, 1, 1

b)

2, 1, 2, 1

c)

1, 2, 1, 2

d)

2, 2, 2, 2

78.

Balance the equation and determine the coefficients

a)

2, 2, 2, 1

b)

2, 3, 4, 2

c)

3, 1, 1, 2

d)

2, 1, 1, 2

79.
Which among the following is(are) double displacement reaction(s)?(i) Pb + CuCl2 → PbCl2 + Cu (ii) Na2SO4 + BaCl2 → BaSO4 + 2NaCl (iii) C + O2 → CO2 (iv) CH4 + 2O2 → CO2 + 2H2O
a)
(i) and (iv)
b)
(ii) only
c)
(i) and (ii)
d)
(iii) and (iv)
80.
A dilute ferrous sulphate solution was gradually added to the beaker containing acidified permanganate solution. The light purple colour of the solution fades and finally disappears. Which of the following is the correct explanation for the observation?
a)
KMnO4 is an oxidising agent, it oxidises FeSO4
b)
FeSO4 acts as an oxidising agent and oxidises KMnO4
c)
The colour disappears due to dilution; no reaction is involved
d)
KMnO4 is an unstable compound and decomposes in presence of FeSO4 to a colourless compound.
81.
The following reaction is an example of a 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g)(i) displacement reaction (ii) combination reaction (iii) redox reaction (iv) neutralisation reaction
a)
(i) and (iv)
b)
(ii) and (iii)
c)
(i) and (iii)
d)
(iii) and (iv)
82.

Coefficients apply to...

a)

Nothing

b)

The entire molecule

c)

Ionic

d)

Covalent

83.

Subscripts apply to what they…

a)

Follow

b)

The entire molecule

c)

Nothing

d)

Ionic

84.

The LEFT side of a chemical reaction is called……

a)

Reactants

b)

Products

c)

Chemical Reaction

85.

What Chemical Reaction is the process of 1 element replacing another element in a compound to create a new compound?

a)

Double Replacement

b)

Single Replacement

c)

Synthesis

d)

Decomposition

86.

Carbon has a atomic number of 6. Calculate the number neutrons in C-14.

a)
6
b)
7
c)
14
d)
8
87.

WhIch sub atomic particle vary between isotopes of an element?

a)

protons, electrons, and atomic mass

b)

protons, electrons, and atomic number

c)

neutrons and electrons

d)

neutrons only

88.

Chlorine has a atomic number of 17. This means it will have:

a)

7 valence electrons and a valency of 1

b)

1 valence electrons and a valency of 7

89.
What is the atomic mass of the atom pictured? 
a)
11
b)
12
c)
22
d)
23
90.

The image shows the scientific notation of sodium. What is the atomic mass of Na?

a)

11

b)

12

c)

23

d)

34

91.

The atomic number of Sulphur (S) is 16. Identify the number of electrons in each shell of Sulphur.

a)

2, 8, 6

b)

2, 8, 8

c)

2, 2, 8, 4

d)

2, 4, 8, 2

92.

The atomic number of sodium (Na) is 11. How many valence electrons does sodium

have?

a)

1

b)

2

c)

7

d)

8

93.

What is the lightest subatomic particle?

a)

atom

b)

electron

c)

proton

d)

neutron

94.
An element with a mass number of 10 and an atomic number of 6 has how many protons?
a)
5
b)
8
c)
6
d)
10
95.

Ag-110 and Ag-112 are two forms of silver with different mass, so they are:

a)
compounds
b)
isotopes
c)
orbitals
d)
neutrons
96.
How many protons, electrons and neutrons does an neutral atom of Calcium have?  Its atomic number is 20 and the mass number is 40.
a)
20 protons, 18 electrons and 40 neutrons
b)
20 protons, 20 electrons and 20 neutrons
c)
40 protons, 40 electrons and 20 neutrons
d)
20 protons, 18 electrons and 20 neutrons
97.
What is the atomic number of the atom pictured? 
a)
11
b)
12
c)
22
d)
23
98.
Which of the following has the greatest amount of movement at a given temperature?
a)
Gas
b)
Liquid
c)
Solid
d)
They all have the same movement
99.

The intermixing of gaseous molecule is refereed as

a)

Diffusion

b)

Derivation

c)

Deviation

d)

None of above

100.

The density of gases is least when compared with solid as well as gas due to

a)

least mass per unit volume

b)

Largest mass per unit volume

c)

No mass per unit volume

d)

No mass and no volume

101.

Following is true for gaseous state of matter

a)

It has definite volume and definite shape

b)

It has definite volume but no definite shape

c)

It has neither definite shape nor definite volume

d)

None of above

102.

Gases can be squeezed to smaller volume because

a)

As molecules are closer to each other

b)

As molecules are farther away from each other

c)

As molecules are stationary

d)

None of above

103.

Gaseous molecule exert pressure in all direction due to

a)

Due to its random motion

b)

Due to its ordered and regular motion

c)

Due to no motion

d)

Due to linear motion

104.
Boyle's law :  The pressure and volume of a gas show a _____ relationship. 
a)
Inverse 
b)
Direct 
105.
The following graph shows ____ relationship. 
a)
Direct
b)
Inverse
106.
Which container will have a lower pressure?
a)
left
b)
right
c)
they both have the same pressure
d)
I don't know
107.
What type of relationship to pressure and volume have?
a)
direct
b)
inverse
c)
no relationship
d)
I don't know
108.
A gas occupies 4.98 L at 2.6 atm of pressure. What volume does it occupy at 1.8 atm pressure?
a)
12.9 L
b)
0.72 L
c)
7.2 L
d)
3.44 L
109.
When Volume increases then Pressure must...
a)
Increase
b)
Decrease
110.
When Pressure increases then the Volume must...
a)
Increase
b)
decrease

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