Limestone And Building Materials

Question 1

What type of rock is limestone?

Answer 1

Sedimentary rock

Question 2

What is sedimentary rock?

Answer 2

Rock formed by the accumulation of sediment

Question 3

What is limestone made up off?

Answer 3

Mainly calcium carbonate

Question 4

Limestone can be used for?

Answer 4

A building material

For making cement, mortar and concrete

Question 5

When calcium carbonate is heated in a kiln it…?

Answer 5

Decomposes

Question 6

When calcium carbonate is heated in a kiln, it decomposes this is called…?

Answer 6

Thermal decomposition

Question 7

Thermal decomposition in calcium carbonate breaks down into what two substances?

Answer 7

Calcium oxide and carbon dioxide

Question 8

Magnesium, copper, zinc, calcium and sodium carbonate decompose in ….. in a similar way

Answer 8

Heating

Question 9

When calcium oxide reacts to water it produces what substance?

Answer 9

Calcium hydroxide

Question 10

What can calcium hydroxide be used for?

Answer 10

To neutralise soils and lakes

Question 11

Powered limestone is roasted in a rotary kiln with powdered clay to produce…?

Answer 11

Dry cement

Question 12

When water and sand is mixed with dry cement what is made?

Answer 12

Mortar

Question 13

What’s mortar used for?

Answer 13

To hold bricks and stones together

Question 14

When sand and water is mixed with mortar what is produced?

Answer 14

Concrete

Question 15

What do carbonates react with to form carbon dioxide gas?

Answer 15

Dilute acids

Question 16

Carbon dioxide turns lime water what?

Answer 16

Cloudy