Advertisements
Advertisements
Question
Identify the following substance:
Gas B that has an offensive smell as of rotten eggs.
Advertisements
Solution
Hydrogen sulphide
APPEARS IN
RELATED QUESTIONS
Write the chemical formula of the Copper nitrate.
What is meant by the symbol of an element ? Explain with examples.
An element B shows valencies of 4 and 6. Write the formulae of its two oxides.
The formula of a compound is X3Y. The valencies of elements X and Y will be respectively :
XCl2 is the chloride of a metal X. State the formula of the sulphate and the hydroxide of the metal X.
Name the element in the compound and give the formula of the following compound:
Acetic acid
Name the element in the compound and give the formula of the following compound:
Green vitriol
Write the formula of the following compound:
Potassium zincate
Write the formula of the following compound:
Potassium sulphate
Write the formula of the following compound:
Sodium permanganate
Write the formula of the following compound:
Sodium aluminate
Write the formula of the following compound:
Magnesium chloride
Write the formula of the following compound:
Magnesium nitrate
Write the formula of the following compound:
Copper [II] sulphate
Write the formula of the following compound:
Iron [II] oxide
Write the formula of the following compound:
Iron [III] hydroxide
Write the formula of the following compound:
Lead [II] oxide
Derive the chemical formula for calcium chloride.
Play a game for writing formula.
Example 2: A low-cost model for writing formulae: Take empty blister packs of medicines. Cut them in groups according to the valency of the element, as shown in the figure. Now, you can make formulae by fixing one type of ion into other.
For example:
The formula for sodium sulphate:
2 sodium ions can be fixed on one sulphate ion.
Hence, the formula will be Na2SO4.
Do it yourself:
Now, write the formula of sodium phosphate.
