IGCSE A Level Chemistry Practice Test 99

Buffer Solutions Quiz PDF: Questions and Answers - 99

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Buffer Solutions Questions and Answers PDF Download: Quiz 99

MCQ 491: One of the best catalysts which increase the rate of reaction by million times is

carbolic anhydrase
carbonic anhydrase
carbolic hydrase
carbonic hydrase

MCQ 492: The first element whose electron lies in 3d sub-shell is

gallium
scandium
boron
aluminum

MCQ 493: The situation in which ions and molecules are constantly reacting is called

dynamic equilibrium
constant equilibrium
reversible
irreversible

MCQ 494: The reaction NaCl_(s) → Na⁺_aq + Cl^-_aq shows that the

NaCl reacts with water
NaCl is hydrated
NaCl is insoluble in water
NaCl is hydrolyzed by water

MCQ 495: Hydrocarbons contain

carbon only
hydrogen only
oxygen
carbon and hydrogen

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