Atomic number of an element is 17. It belongs to which group and period? MCQ with Answer and Explanation

Explanation:
Ethanol is added to chloroform to inhibit its oxidation to phosgene (COCl₂) – a negative catalyst. Others are positive catalysts that speed up reactions.

Explanation:
Baking powder is a mixture of sodium bicarbonate (baking soda) and a mild edible acid, usually tartaric acid. When moistened and heated, they react to release CO₂, causing dough to rise. Baking soda alone requires an external acidic ingredient. The acid ensures complete reaction and avoids a bitter taste.

Explanation:
Compost is decomposed organic matter (plant waste, manure) and is an organic fertilizer. Urea, though organic compound, is considered a synthetic nitrogenous fertilizer when industrially produced. Organic fertilizers are derived from natural sources: manure, bone meal, compost. They improve soil structure. Ammonium nitrate, superphosphate are inorganic/synthetic. Urea is often categorized as synthetic organic.