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प्रश्न
What is a chemical reaction?
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उत्तर
A chemical reaction is the process of breaking the chemical bonds of the reacting substances (reactants) and making new bonds to form new substances (products).
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संबंधित प्रश्न
Complete and balance the following chemical equations:
`"H"_2"S"` + `"CI"_2` `→`
Name the type of chemical reaction shown by the following equation:
Fe + CuSO4 → FeSO4 + Cu
Multiple choice:
Thermal decomposition of sodium carbonate will produce
Give an example of the following chemical changes.
A reaction involving
(i) Change of state
(ii) formation of precipitate
Complete and balance the following reaction:
\[\ce{NH3 + O2 ->[\Delta]}\]
Select the correct answer for the following options:
The pale blue precipitated obtained when copper [II] sulphate reacts with sodium hydroxide.
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
A coloured substance which leaves on strong heating a black residue and evolves two colourless gases one of which is acidic and the other neutral.
A chemical reaction is often accompanied by external indications or characteristics.
Complete the statement by filling in the blank with the correct word:
The reddish-brown precipitate obtained during a double decomposition precipitation reaction between an iron salt and alkali is __________.
The chemical name of baking soda is sodium bicarbonate.
