(i) Solution of a substance 'X' is used for testing carbon dioxide. Write the equation of the reaction of 'X' with carbon dioxide.

Molecular mass of CO2 = 12 + 2 x 16 = 44  1mol of CO2 = 44 g  44 g of CO2 contain = 6.022 x 1023 molecules  88 g of CO2 contain...

(d) Acid rain is caused by a chemical reaction that begins when compounds of sulphur dioxide and nitrogen oxide react with molecules in the atmosphere to produce acids.

Answer: X=Ca(OH)2-Calcium Hydroxide Equation: CO2 + Ca(OH)2 →CaCO3 ( Calcium Carbonate)

CO2 is acidic in nature, therefore, it reacts with the strong base KOH to form K2CO3. 2KOH + CO2                  K2CO3 + H2O The increase...

(C) totally different from both carbon and oxygen

AgNO3(aq) + KCl(aq) → AgCl(s) + KNO3(aq) It is a double displacement reaction. Siiver chloride / Potassium nitrate

(i) X→ Quick lime, fcrrmula - CaO (ii) CaO + H2O→ Ca(OH)2

(i) Substance X is lime water. Ca(OH)2 + CO2 → CaCO3 + H2O Ca(OH)2  -(Lime water) CO2   -(Carbon dioxide) CaCO3 -(Calcium carbonate) H2O - (Water) (ii) Calcium oxide reacts vigorously with water to produce slaked lime (calcium hydroxide) releasing a large amount of...

(ii), [Hint: If added substance dissolves, the solution is unsaturated. If it does not dissolve solution is saturated. If precipitation occurs solution is supersaturated.]

The Right option is : (d) wood