Free Printable ASCHEM Unit 3 Rview

1.

Write the reaction equation that occurs when strontium nitrate is strongly heated

a)

$2Sr\left(NO_3\right)_2\ \overrightarrow{\ \Delta\ }\ 2SrO\ +\ 4NO_2\ +\ O_2\$

b)

$SrNO_3\ \overrightarrow{\ \Delta\ }\ SrO\ +\ NO_{ }\ +\ O_2\$

c)

$Sr\left(CO_3\right)_2\ \overrightarrow{\ \Delta\ }\ 2SrO\ +\ 4CO_2\ +\ O_2\$

d)

$SrNO_3\ \overrightarrow{\ \Delta\ }\ SrO\ +\ NO_2$

2.

When barium or its compounds are heated in oxygen they do not burn.

a)

True

b)

False

3.

Compared with a molecule of HF, the bond energy of the HCl bond is (a) .

Choose from the below words

lower

higher

longer

faster

4.

Which sodium salts form a precipitate when AgNO3 followed by dilute NH3(aq) is added to its aqueous solution?

a)

chloride

b)

bromide

c)

iodide

d)

nitrate

5.

Which sodium salts form a precipitate when AgNO3 followed by concentrated NH3(l) is added to its aqueous solution?

a)

chloride

b)

bromide

c)

iodide

d)

acetate

6.

Which is faster, the reaction of magnesium with cold water or strontium with cold water?

a)

magnesium

b)

strontium

7.

Which is faster, the reaction of calcium with cold water or barium with cold water?

a)

calcium

b)

barium

8.

A stone has been carved as a statue. The stone is made of CaCO3. The statue is suffering damage over time. What is the cause of this?

a)

sulfur dioxide from fossil fuels forming acid rain

b)

hydrocarbon emissions from motor vehicles

c)

increased temperature from global warming

d)

increased ultraviolet radiation as the ozone layer is destroyed

9.

Draw a graph of the group 17 elements and their strengths of their van der waals forces.

10.

Compared with the HBr molecule, the bond length of the HI molecule is (a) .

Choose from the below words

longer

shorter

stronger

vagrant

11.

Reorder the following in terms of INCREASING solubility

a)

beryllium hydroxide

b)

magnesium hydroxide

c)

calcium hydroxide

d)

strontium hydroxide

e)

barium hydroxoide

1)

2)

3)

4)

5)

12.

What are the results of adding silver nitrate to sodium bromide AND what are results of further adding dilute aqueous ammonia?

a)

cream ppt AND ppt stays

b)

white ppt AND ppt dissolves

c)

pale yellow ppt AND ppt stays

d)

cream ppt AND ppt dissolves

e)

pale yellow ppt AND ppt dissolves

13.

Reorder the following in terms of increasing solubility

a)

barium sulfate

b)

strontium sulfate

c)

calcium sulfate

d)

magnesium sulfate

e)

beryllium sulfate

1)

2)

3)

4)

5)

14.

What ion in fertilizers, when washed out of the soil by rain, causes excessive growth of river plants and algae with the result being fish in the river die?

a)

nitrate

b)

sulfate

c)

hydroxide

d)

chlorate

15.

Fireworks are lit using a fuel and an oxidizing agent. Magnesium metal is the fuel and strontium nitrate is the oxidizing agent. Which solids are produced when the firework is lit in air?

a)

$MgO$

b)

$Mg\left(NO_3\right)_2$

c)

Sr

d)

$SrO$

e)

$Sr\left(NO_3\right)_2$

16.

Reorder the following in INCREASING bond energy

a)

HI

b)

HBr

c)

HCl

d)

HF

1)

2)

3)

4)

17.

The hydride of (a) is of greater thermal stability than that of (b) .

Choose from the below words

bromine

iodine

magnesium

18.

What reaction occurs in a catalytic converter and decrease the emissions of nitrogen monoxide?

a)

$2CO\ +\ 2\ NO\ ->\ N_2\ +\ 2CO_2\ \ \ \ \ \$

b)

$N_2\ +\ O_2\ ->2NO$

c)

$SO_2\ +H_2O\ +\frac{1}{2}O_2\ ->\ H_2SO_4$

d)

$2NO\ +\ O_2\ ->\ 2NO_2$

19.

Steam is passed heated strontium to give compound X and hydrogen. Which of the following is(are) a property(ies) of compound X?

a)

It is very soluble in water.

b)

It has a high melting point.

c)

It is a basic oxide.

d)

It is a white solid.

20.

What reaction in the atmosphere does sulfur dioxide have with nitrogen dioxide?

a)

$SO_2\ +\ NO\ ->\ SO_3\ +\ N_2$

b)

$SO_2\ +\ O_2\ ->\ SO_4$

c)

$SO_2\ +\ NO_2\ ->\ SO_3\ +\ NO$

d)

$2NO_2\ +\ H_2O\ ->\ 2HNO_3$

21.

Which of the following compounds loses mass when heated by a Bunsen burner?

a)

magnesium carbonate

b)

magnesium nitrate

c)

magnesium oxide

22.

The trend for the decomposition temperature of the nitrate as group II is descended from magnesium to strontium is (a) .

Choose from the below words

increasing

decreasing

unknown

constant

23.

When magnesium or its compounds are heated in oxygen it does not burn.

a)

True

b)

False

24.

When magnesium or its compounds ares heated, magnesium carbonate decomposes to give magnesium oxide.

a)

True

b)

False

25.

When magnesium or its compounds, specifically magnesium oxide is added to water the solution becomes alkaline.

a)

True

b)

False

26.

What pollutant is formed in the internal combustion engine and if not removed by the catalytic converter may become involved in the formation of acid rain?

a)

NO

b)

$SO_2$

c)

$CO_2$

d)

$CH_4$

ASCHEM Unit 3 Rview

Total questions: 26

Worksheet time: 9mins

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