IGCSE O Level Chemistry Practice Test 160

Catalysts and Enzymes Multiple Choice Questions (MCQ) PDF - 160

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Catalysts & Enzymes Questions and Answers PDF Download: Quiz 160

MCQ 796: What is true about Enzymes?

A) they act as biological catalysts

B) they operate over a wide range of pH

C) they are highly specific

D) they operate over wide temperatures only

MCQ 797: Combining Copper(II) (Cu⁺²) with Oxygen (O₂) results in

A) CuO

B) Cu₂O

C) CuO₂

D) Cu(OH)₂

MCQ 798: Diazo reagent is used as a locating agent in the chromatography of

A) picric acids

B) benzoic acids

C) phenolic acids

D) salicylic acid

MCQ 799: Molar mass of (NH₄)₂SO₄ is

A) 113.19 g/mol

B) 124.21 g/mol

C) 141.39 g/mol

D) 132.139 g/mol

MCQ 800: What is true about fractional distillation?

A) it cannot separate liquids whose boiling points are close

B) it can separate liquids whose boiling points are close

C) it can separate liquids whose boiling points are very high

D) none of above

IGCSE O Level Chemistry Exam Prep Tests

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