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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
Will you be able to check if water is hard by using a detergent?
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 279
Topic
What are oxidising agents?
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 243
Topic
How would you distinguish experimentally between alcohol and carboxylic acid?
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 370
Topic
A mixture of ethyne and oxygen is used for welding. Can you tell why a mixture of ethyne and air is not used?
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 109
Topic
Why is the conversion of ethanol into ethanoic acid an oxidation reaction?
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 134
Topic
What will be the formula and electron dot structure of cyclopentane?
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 141
Topic
What are the two properties of carbon which lead to the huge number of carbon compounds we see around us?
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 364
Topic
How many structural isomers can you draw for pentane?
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 259
Topic
What would be the electron dot structure of a molecule of sulphur which is made up of eight atoms of sulphur?
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 303
Topic
What would be the electron dot structure of carbon dioxide which has the formula CO2?
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 291
Topic
Give electron dot structures for sodium, magnesium and oxygen. (b) Show the formation of Na2O and MgO by the transfer of electrons. (c) What are the ions present in these compounds?
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 128
Topic
Differentiate between metals and non-metals on the basis of chemical properties.
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 246
Topic
Give reason why copper is used to make hot water tanks and not steel (an alloy of iron).
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 286
Topic
A man went door to door posing as a goldsmith. He promised to bring back the glitter on dull gold ornaments. An unsuspecting lady gave a set of gold bangles to him which he dipped in a particular solution. The bangles sparkled like new but their weig...
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 112
Topic
You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice. Explain why these sour substances are effective in cleaning the vessels.
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 90
Topic
Give reasons for the following: (a) Platinum, gold and silver are used to make jewellery. (b) Sodium, potassium and lithium are stored under oil.
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 94
Topic
What types of oxides are formed when non-metals combine with oxygen?
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 66
Topic
State two ways to prevent rusting of iron.
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 80
Topic
Pratyush took sulphur powder on a spatula and heated it. He collected the gas evolved by inverting a test tube over it as shown in the figure.
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 105
Topic
In the electrolytic refining of metal M, name anode, cathode and electrolyte.
4 years ago
Forum
Metals and Non-metals
Replies: 0
Views: 266
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