Free Printable CHEMISTRY 9

1.

Which ion has the most shells that contain electrons?

a)

$Al^{3+\ \ \ \ \ }\ \ \ \$

b)

$Be^{2+\ \ \ \ \ }$

c)

$N^{3-\ \ }$

d)

$S^{2-}\ \ \ \$

2.

Nucleon number of an tom of element X is 7 and its proton number is 3. Which statement about an atom of X is correct?

a)

It is in Group 3 of the Periodic Table

b)

It is in Group 7 of the Periodic Table

c)

The total number of protons and electrons is 6

d)

The total number of protons and neutrons is 10.

3.

The relative atomic mass of naturally occurring chlorine is not a whole number. What is the reason for this?

a)

Chlorine atoms can have different numbers of neutrons.

b)

Chlorine is unstable

c)

Naturally occurring chlorine cannot be obtained pure

d)

The mass of electrons has been included.

4.

Which statement about an atom is correct?

a)

Each element has only one nucleon (mass) number

b)

The nucleon (mass) number can be less than proton (atomic) number

c)

The nucleon (mass) number can be equal the proton (atomic) number

d)

The number of neutrons never equals the number of electrons.

5.

What has a mass equal to that of one mole of water?

a)

$24\ dm^3\$ of water

b)

one mole of steam

c)

one molecule of water

d)

two moles of hydrogen molecules and one mole of oxygen molecules

6.

What is the mass of magnesium which completely reacts with $250\ cm^3\$ of 1.0 $mol\ dm^{-1}\ \$ sulphuric acid?

a)

6 g

b)

12 g

c)

48 g

d)

96 g

7.

A volume of ethane, $C_2H_6,\$ at r.t.p. has a mass of 20 g.

What is the mass of an equal volume of propene, $C_3H_6,$ at r.t.p.?

a)

20 g

b)

21 g

c)

28 g

d)

42 g

8.

What is the ratio of the volume of 2 g of hydrogen to the volume of 16 g of methane, both volume at r.t.p.?

a)

1 to 1

b)

1 to 2

c)

1 to 8

d)

2 to 1

9.

What is the mass of aluminium in 204 g of aluminium oxide, $Al_2O_3?\$

a)

26 g

b)

27 g

c)

54 g

d)

108 g

10.

Which quantity is the same for one mole of ethanol and one mole of ethane?

a)

mass

b)

number of atoms

c)

number of molecules

d)

volume at r.t.p.

11.

A beaker contains $30\ cm^3\ \ \$ of $0.03\ mol\ dm^{-1\ \ }$ sulphuric acid.

Which volume of $0.03\ mol\ dm^{-1\ \ }$ sodium hydroxide must be added to exactly neutralise all the acid?

a)

$27\ cm^3\ \$

b)

$30\ cm^3\ \$

c)

$60\ cm^3\ \$

d)

$90\ cm^3\ \$

12.

In which reaction does the smallest percentage change in volume occur?

a)

$C_3H_{8\ }\left(g\right)+5O_2\left(g\right)\rightarrow3CO_2\left(g\right)\ +4H_2O\left(l\right)$

b)

$4NH_3\left(g\right)+3O_2\left(g\right)\rightarrow2N_2\left(g\right)\ +6H_2O\left(l\right)$

c)

$CH_{4\ }\left(g\right)+2O_2\left(g\right)\rightarrow CO_2\left(g\right)\ +2H_2O\left(l\right)$

d)

$2H_2S_{\ }\left(g\right)+SO_2\left(g\right)\rightarrow3S\left(g\right)\ +2H_2O\left(l\right)$

13.

Which volume of $0.1\ mol\ dm^{-1}$ hydrochloric acid is required to react completely with $25\ cm^3\ of\ 0.2\ mol\ dm^{-1}\ \$ aqueous sodium carbonate?

a)

$100\ cm^3\ \ \$

b)

$50\ cm^3$

c)

$25\ cm^3$

d)

$6.25\ cm^3$

14.

8 g of $X_2O_3\ \$ , an oxide of element X, contains 5.6 g of X.

How many moles of X does 5.6 g of the element contain?

a)

$\frac{2.4}{16}\times\frac{2}{3}\ \$

b)

$\frac{2.4}{16}\times\frac{3}{2}$

c)

$\frac{8}{16}\times\frac{2}{3}$

d)

$\frac{8}{16}\times\frac{3}{2}$

15.

Which element contains the greatest number of atom in 1 g?

a)

Carbon

b)

Iodine

c)

Iron

d)

Oxygen

CHEMISTRY 9

Total questions: 15

Worksheet time: 41mins

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