2H2O (l) + 2F2(g) → 4HF(aq) + O2(g). A. O2(g) B. H2O(l) C. F2(g) D. HF(aq) Correct Answer: Option C…
A. the reaction of trioxocarbonate (V) with an acid B. double decomposition C. the action of dilute acid on an…
A. Aluminium oxide B. Sodium hydrogentrioxosulphate (V) C. Sodium trioxocarbonate (V) D. Zinc chloride Correct Answer: Option A - Aluminium…
A. close to that of pure water B. less than 6.4 C. greater than 6.4 D. unaltered Correct Answer: Option…
A. a decrease in the temperature of the water which cause in death of aquatic animals B. an increase in…
A. turpentine B. ammonia solution C. ethanol D. solution of borax in water Correct Answer: Option B = ammonia solution
A. CuO (S) B. MgCl2(S) C. CaCl2 (S) D. NaOH(S) Correct Answer: Option A = CuO (S)
A. white to red B. blue to white C. blue to pink D. white to blue Correct Answer: Option C…
A. nitrogen B. carbon (IV) oxide C. noble gases D. oxygen Correct Answer: Option A - nitrogen
A. metallic B. covalent C. dative D. ionic Correct Answer: Option D - ionic