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Deepak Rock
@deepak-rock
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Joined: Aug 6, 2021
Last seen: Sep 10, 2021
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Topics: 1742 / Replies: 303
AllTopicsReplies
Topic
Name two metals which can displace hydrogen from dilute acids and two metals which cannot do so.
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 196
Topic
What are amphoteric oxides? Give examples of two amphoteric oxides.
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 268
Topic
You are given a hammer, a battery, a bulb, wires and a switch: (a) How could you use them to distinguish between samples of metals and non-metals?
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 80
Topic
Food cans are coated with tin and not with zinc because
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 64
Topic
An element reacts with oxygen to give a compound with high melting point. This compound is also water-soluble. The element is likely to be:
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 96
Topic
Which of the following methods is suitable for preventing an iron frying pan from rusting?
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 67
Topic
Which of the following will give displacement reactions? (a) NaCl solution and copper metal (b) MgCl2 solution and aluminium metal
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 77
Topic
What are alloys?
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 65
Topic
Which metals do not corrode easily?
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 207
Topic
Metallic oxides of zinc, magnesium and copper were heated with the following metals. Metal - Zinc - Magnesium - Copper Zinc oxide - Magnesium oxide - Copper oxide -
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 105
Topic
Which chemical process is used for obtaining a metal from its oxide?
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 307
Topic
Name two metals which are formed in nature in free state.
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 297
Topic
Define the following terms: (a) Minerals (b) Ores (c) Gangue
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 352
Topic
Why do ionic compounds have high melting points?
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 101
Topic
What would you observe when zinc is added to a solution of iron(II) sulphate? Write the chemical reaction that takes place.
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 268
Topic
Which gas is produced when dil. hydrochloric acid is added to a reactive metal? Write the chemical reaction when Iron reacts with dil. H2SO4.
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 350
Topic
Samples of four metals A, B, C and D were taken and were added to the following solutions one by one. The results obtained have been tabulated and answer the questions that follow:
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 85
Topic
Write the equations for the reactions of: (a) iron with steam (b) calcium until water
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 82
Topic
Why is sodium kept immersed in kerosene oil?
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 89
Topic
Explain the meaning of malleable and ductile.
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 56
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