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

A) carbolic anhydrase

B) carbonic anhydrase

C) carbolic hydrase

D) carbonic hydrase

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

A) gallium

B) scandium

C) boron

D) aluminum

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

A) dynamic equilibrium

B) constant equilibrium

C) reversible

D) irreversible

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

A) NaCl reacts with water

B) NaCl is hydrated

C) NaCl is insoluble in water

D) NaCl is hydrolyzed by water

MCQ 495: Hydrocarbons contain

A) carbon only

B) hydrogen only

C) oxygen

D) carbon and hydrogen

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