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BidishaKashayap1333
@bidishakashayap1333
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Joined: Oct 11, 2021
Last seen: Jul 27, 2023
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Topics: 2174 / Replies: 0
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Topic
If 1.4g of calcium oxide is formed by the complete decomposition of calcium carbonate, then the amount of calcium carbonate taken and the amount of carbon dioxide formed will be respectively
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 104
Topic
The element having atomicity ‘four’ is most likely to be: (a) Argon (b) Fluorine (c) Phosphorus (d) Francium
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 91
Topic
The law of conservation of mass was given by: (a) Dalton (b) Proust (c) Lavoisier (d) Berzelius
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 260
Topic
The English name of an element is potassium, Its Latin name will be:
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 114
Topic
One of the following element has an atomicity of ‘one’. The element is: (a) Helium (b) Hydrogen (c) Sulphur (d) Ozone
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 268
Topic
The atomic theory of matter was proposed by: (a) John Kennedy (b) Lavoisier (c) Proust (d) John Dalton
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 175
Topic
Which of the following is not a disproportionation reaction?
3 years ago
Forum
Redox Reactions
Replies: 0
Views: 210
Topic
A compound of Xe and F is found to have 53.5% of Xe. What is oxidation number of Xe in this compound?
3 years ago
Forum
Redox Reactions
Replies: 0
Views: 121
Topic
Zn gives H2 gas with H2SO4 and HCl but not with HNO3 because
3 years ago
Forum
Redox Reactions
Replies: 0
Views: 258
Topic
Which reaction involves neither oxidation nor reduction?
3 years ago
Forum
Redox Reactions
Replies: 0
Views: 216
Topic
Which of the following represents a redox reaction? (a) NaOH + HCl → NaCl + H2O (b) BaCl2 + H2SO4 → BaSO4 + 2HCl
3 years ago
Forum
Redox Reactions
Replies: 0
Views: 186
Topic
The Latin language name of an element is natrium. The English name of this element is
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 341
Topic
The symbol of a metal element which is used in making thermometers is: (a) Ag (b) Hg (c) Mg (d) Sg
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 286
Topic
The atomicities of ozone, sulphur, phosphorus and argon are respectively
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 245
Topic
Define atomic mass unit. What is its symbol? (b) Define atomic mass of an element. (c) What is meant by saying that ‘the atomic mass of oxygen is 16’?
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 239
Topic
What is an atom? How do atoms usually exist? (b) What is a molecule? Explain with an example. (c) What is the difference between the molecule of an element and the molecule of a compound?
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 180
Topic
(a) What is the significance of the symbol of an element? Explain with the help of an example. (b) Explain the significance of the symbol H.
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 275
Topic
State the various postulates of Dalton’s atomic theory of matter. (b) Which postulate of Dalton’s atomic theory can explain the law of conservation of mass?
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 236
Topic
State the law of constant proportions. Give one example to illustrate this law.
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 253
Topic
State the law of conservation of mass. Give one example to illustrate this law.
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 99
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