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प्रश्न
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Water
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उत्तर
Step 1: Write the symbols of the radicals.
H O
Step 2: Write the valency below the respective radical.
H O
1 2
Step 3: Cross-multiply symbols of radicals with their respective valency.
Step 4: Write down the chemical formula of the compound.
संबंधित प्रश्न
What is a chemical reaction?
State the original colour of the following substance and colour of residue obtained after heating.
Lead nitrate
Give examples of exothermic reactions i.e. heat evolved in each of the following:
(a) reaction between a solid and a liquid
(b) reaction between two gases
Give two examples of exothermic reactions seen in everyday life.
Give balanced equation for the following conversion affected by heat alone on the substance:
Copper nitrate to nitrogen dioxide
State the following reaction represent oxidation or reduction.
\[\ce{Ag->Ag+}\]
Higher order Thinking question
Peeled and unpeeled banana does not look the same. Does that mean peeling banana is a chemical change?
Classify the following as physical or chemical properties
Most metal oxides form alkalis on interacting with water.
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.
State whether the following statement is true or false:
When a candle burns, both physical and chemical changes take place.
When milk is mixed with coffee decoction, the colour of milk and decoction changes due to ______.
