Reactivity Series

Q. (f) Name a non-metal that is used for cancer therapy.​

Q.

Which of the following is incorrect with respect to metals?

1. If one of the metals is mercury, then the alloy is known as an amalgam.

2. The metals high up in the reactivity series are very reactive.

3. Metals above hydrogen in the activity series cannot displace hydrogen from dilute acids.

4. Metals reacts with dilute acid to form its salt and hydrogen gas.

Q. (b) Name a non-metal that is hardest naturally occurring substance.​

Q. Beakers A, B, and C contain zinc sulphate, silver nitrate, and ferrous sulphate solutions respectively. Copper pieces are added to each beaker. Blue colour will appear in case of:

1. Beaker B
2. Beaker A
3. Beaker C
4. All the beakers

Q. Aluminium powder was added to a solution of copper sulphate. The colour of the solution changed from :

1. Blue to colourless
2. Colourless to blue
3. Light green to blue
4. Reddish brown to light green

Q.

Which of the following combination of compounds undergoes a displacement reaction?

1. NaCl solution and copper
2. and NaCl solution
3. solution and silver metal
4. solution and copper metal

Q. Aluminium is used in thermite welding because:

1. aluminium is a light metal
2. aluminium has more affinity for oxygen
3. aluminium is a strong oxidizing agent
4. aluminium is a reactive metal

Q. A list of metals which are arranged in order of their decreasing reactivity is known as:

1. Electrolytic refining
2. Roasting
3. Metallurgy
4. Activity series

Q. Which of the following does not react with base under normal conditions?

1. Oxygen
2. Sulphur
3. Chlorine
4. Zinc

Q. A metal less reactive and another metal more reactive than hydrogen arem :

1. aluminium and lead
2. iron and magnesium
3. copper and aluminium
4. copper and mercury

Q. a) Why are metal stoppers not used in bottles that are used to store acids in the laboratory?​ [1.5 Marks]

b) Between phenolphthalein and methyl orange, which will not indicate acids? [1.5 Marks]