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प्रश्न
Identify the following substance:
An alkaline gas A which gives dense white fumes with hydrogen chloride.
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उत्तर
Ammonia gas
संबंधित प्रश्न
Write the chemical formula of the Copper nitrate.
What is meant by the symbol of an element ? Explain with examples.
What do the following abbreviations stand for ?
- O
- 2O
- O2
- 3O2
The element having atomicity 'four' is most likely to be :
An element Z has a valency of 3. What is the formula of oxide of Z ?
An element Y has a valency of 4. Write the formula for its :
- chloride
- oxide
- sulphate
- carbonate
- nitrate
An element A forms an oxide A2O5.
What will be the formula of chloride of A ?
Give the formula and valency of:
cupric ………………… .
Correct the following statement:
A molecular formula represents an element.
Give the empirical formula of : Benzene C6H6
Give the empirical formula of Acetylene C2H2
Write the formula of the following compound:
Potassium zincate
Write the formula of the following compound:
Calcium nitrate
Write the formula of the following compound:
Calcium sulphate
Write the formula of the following compound:
Zinc oxide
Write the formula of the following compound:
Copper [II] chloride
What do you understand by chemical formula of a compound? What is its significance?
Write the chemical formula for the following elements.
- Hydrogen
- Nitrogen
- Ozone
- Sulphur
Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them. (You may use appendix-III).
- Ammonia
- Carbon monoxide
- (Hydrogen chloride
- Aluminium fluoride
- Magnesium sulphide
