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प्रश्न
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Potassium fluoride
उत्तर
Step 1: Write the symbols of the radicals.
K F
Step 2: Write the valency below the respective radical.
K F
1 1
Step 3: Cross-multiply symbols of radicals with their respective valency.
Step 4: Write down the chemical formula of the compound. KF
संबंधित प्रश्न
Write true or false.
A chemical equation gives only qualitative information of a chemical reaction.
Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
The conversion of ferrous sulphate to ferric sulphate is ______ reaction.
Give reason for the following:
Colourless concentrated sulphuric acid in a test tube changes to blue on adding a small piece of copper to it.
State the original colour of the following substance and colour of residue obtained after heating.
Zinc carbonate
Select the correct answer for the following options:
The pale blue precipitated obtained when copper [II] sulphate reacts with sodium hydroxide.
Give balanced equation for the following conversion affected by heat alone on the substance:
Ammonium dichromate to nitrogen
A chemical reaction is often accompanied by external indications or characteristics.
On heating calcium carbonate gets converted into calcium oxide and carbon dioxide.
(a) Is this a physical or a chemical change?
(b) Can you prepare one acidic and one basic solution by using the products formed in the above process? If so, write the chemical equation involved.
Classify each of the following, as a physical or a chemical change. Give reasons.
(a) Drying of a shirt in the sun.
(b) Rising of hot air over a radiator.
(c) Burning of kerosene in a lantern.
(d) Change the colour of black tea by adding lemon juice to it.
(e) Churning of milk cream to get butter.
Heat may evolve or be absorbed during a ______ change.
