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romiroy12
romiroy12
@romiroy12
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Joined: Oct 18, 2020
Last seen: Jul 3, 2023
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Topics: 2049 / Replies: 0
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Topic
The arrangement of elements in the Modem Periodic Table is based on their
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 268
Topic
An atom of an element has the electronic configuration 2, 8, 2. To which group does it belong?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 134
Topic
The properties of eka-aluminium predicted by Mendeleev are the same as the properties of later discovered element:
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 200
Topic
At the time of Mendeleev, the number of elements known was
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 204
Topic
In Mendeleev’s Periodic Table, gaps were left for the elements to be discovered later. Which of the following elements found a place in the Periodic Table later?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 100
Topic
Upto which element, the Law of Octaves was found applicable?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 188
Topic
Newlands relation is called (a) Musical Law (b) Law of Octaves (c) Periodic Law (d) Atomic Mass Law
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 610
Topic
How would you bring about the following conversions? Name the process and write the reaction involved. (a) Ethanol to ethene (b) Propanol to propanoic acid
5 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 353
Topic
A compound ‘C’ (molecular formula, C2H4O2) reacts with Na-metal to form a compound ‘R’ and evolves a gas which burns with a pop sound. Compound ‘C’ on treatment with an alcohol ‘A’ in presence of an acid forms a sweet smelling compound ‘S’ (molecular...
5 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 148
Topic
(a) Write the formula and draw electron dot structure of carbon tetrachloride. (b) What is saponification? Write the reaction involved in this process.
5 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 256
Topic
What is the role of metal or reagents written on arrows in the given chemical reactions?
5 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 148
Topic
Match the reactions given in Column (A) with the names given in Column (B).
5 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 148
Topic
Catenation is the ability of an atom to form bonds with other atoms of the same element. It is exhibited by both carbon and silicon. Compare the ability of catenation of the two elements. Give reasons.
5 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 127
Topic
A gas is evolved when ethanol reacts with sodium. Name the gas evolved and also write the balanced chemical equation of the reaction involved.
5 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 115
Topic
Intake of small quantity of methanol can be lethal. Comment.
5 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 130
Topic
Why detergents are better cleansing agents than soaps? Explain.
5 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 121
Topic
A compound X is formed by the reaction of a carboxylic acid C2H4O2 and alcohol in presence of a few drops of H2SO4. The alcohol on oxidation with alkaline KMnO4 followed by acidification gives the same carboxylic acid as used in this reaction. Give t...
5 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 201
Topic
Identify and name the functional groups present in the following compounds.
5 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 185
Topic
Write the names of the following compounds.
5 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 134
Topic
Draw the electron dot structure of ethyne and also draw its structural formula.
5 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 133
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