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प्रश्न
Identify the following substance:
Gas B that has an offensive smell as of rotten eggs.
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उत्तर
Hydrogen sulphide
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संबंधित प्रश्न
Write down the formulae of magnesium hydroxide.
Write down the formulae for the following compounds :
Calcium oxide
An element X has a valency of 4 whereas another element Y has a valency of 1. What will be the formula of the compound formed between X and Y ?
The formula of a compound is X3Y. The valencies of elements X and Y will be respectively :
Give the formula and valency of:
aluminium ………………. .
Give the formula and valency of:
cupric ………………… .
Complete the following statement by selecting the correct option :
The correct formula of aluminium oxide is
Correct the following statement:
A molecular formula represents an element.
Give the empirical formula of Glucose C6H12O6 .
Name the element in the compound and give the formula of the following compound:
Green vitriol
Name the element in the compound and give the formula of the following compound:
Ethanol
Write the formula of the following compound:
Potassium sulphate
Write the formula of the following compound:
Sodium hydroxide
Write the formula of the following compound:
Sodium iodide
Write the formula of the following compound:
Copper [I] sulphide
Write the formula of the following compound:
Copper [II] sulphide
Write the formula of the following compound:
Silver [II] chloride
Play a game for writing formula.
Example 1: Make placards with symbols and valencies of the elements separately. Each student should hold two placards, one with the symbol in the right hand and the other with the valency in the left hand. Keeping the symbols in place, students should criss-cross their valencies to form the formula of a compound.
