A. calcium hydroxide or magnesium hydroxide B. calcium trioxocarbonate (IV) or calcium tetraoxosulphate (VI) C. sodium hydroxide or magnesium hydroxide…
A. Electrovalent B. Metallic C. Covalent D. Dative Correct Answer: Option A - Electrovalent
A. cause coagulation B. neutralize acidity C. prevent goitre and tooth decay D. kill germs Correct Answer: Option A -…
A. X - rays B. γ - rays C. α - rays D. β - rays Correct Answer: Option A…
A. dative bond B. metallic bond C. hydrogen bond D. van der Waal's forces Correct Answer: Option D - van…
A. 16 B. 15 C. 46 D. 31 Correct Answer: Option B - 15
A. The non-metallic properties of the elements tend to decrease across each period B. The valence electrons of the elements…
A. kinetic energy of particles increases from solid to gas B. Random motion of particles increases from liquid to gas…
A. 0.40 mol dm-³ B. 0.50 mol dm-³ C. 0.05 mol dm-³ D. 0.30 mol dm-³ Correct Answer: Option B…
A. amylase B. protease C. lipase D. dehydrogenase Correct Answer: Option D - dehydrogenase