Reactivity Test 2

Question 1

Potassium, sodium and lithium react with cold water to form what

Answer 1

produce a METAL HYDROXIDE and HYDROGEN GAS.

Question 2

what happens when potassium reacts with cold water

Answer 2

1) Potassium is the most reactive so reacts very quickly.

2) The hydrogen produced ignites instantly and the metal also sets alight, sparking and burning with a lilac flame.

Question 3

what happens when sodium reacts with cold water

Answer 3

1) Sodium fizzes rapidly and melts to form a ball that moves around on the water surface.

Question 4

what happens when lithium reacts with cold water

Answer 4

1) Lithium fizzes steadily and floats, becoming smaller until it eventually disappears.

Question 5

what are the metals that do not react with dilute acids

Answer 5

1) copper
2) silver
3) gold
4) platinum.

Question 6

what are the the metals that react with dilute acids but not cold water

Answer 6

1) magnesium
2) aluminium
3) zinc
4) iron
5) lead

Question 7

magnesium, aluminium, zinc, iron and lead react with dilute acid to form what

Answer 7

produce A SALT and HYDROGEN