PDF chapter test TRY NOW
1. Complete the missing components/variables given as 'x' and 'y' in the following reactions.
\(CaCO_3\)(s) \(\xrightarrow[]{x}\) \(CaO\)(s) + \(CO_2\)(g)
In the above reaction, \(x\) is . When calcium carbonate is , it decomposes into calcium oxide (quick lime) and carbon dioxide.
\(CaCO_3\)(s) \(\xrightarrow[]{Heat}\) \(CaO\)(s) + \(CO_2\)(g)
2. Which among the following changes are exothermic or endothermic in nature?
Dissolution of ammonium chloride in water.
\(NH_4Cl\)(s) + \(H_2O\) → \(NH_4{^+}\)(aq) + \(Cl^−\)(aq)
The dissolution of ammonium chloride in water is an reaction because it includes to generate ammonium \(NH_4{^+}\) ion and chlorine \(Cl^−\) ion.
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