Q. Name two metals which will displace hydrogen from dilute acids, and two metals which will not.
Which of the following combination of compounds undergoes a displacement reaction?
- and NaCl solution
- solution and silver metal
- solution and copper metal
- NaCl solution and copper
Which of the following metals is less reactive than hydrogen?
Q. A list of metals which are arranged in order of their decreasing reactivity is known as:
- Electrolytic refining
- Activity series
Which of the following is incorrect with respect to metals?
If one of the metals is mercury, then the alloy is known as an amalgam.
Metals above hydrogen in the activity series cannot displace hydrogen from dilute acids.
Metals reacts with dilute acid to form its salt and hydrogen gas.
The metals high up in the reactivity series are very reactive.
Q. Food cans are generally coated with tin rather than zinc because ____.
- Zinc is more reactive
- Zinc has high boiling point
- Zinc is less reactive
- Zinc is expensive
Q. When metal Z is added to dilute HCl solution, there is no evolution of gas. Metal 'Z' is:
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:
- Beaker A
- Beaker C
- All the beakers
- Beaker B
Q. Arrange these materials in decreasing order of their reactivity
Q. Iron is less reactive than _____.