chemistry MCQs – Page 32

Practise multiple-choice questions from chemistry for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemistry Mcqs
621. Lipopolysaccharides are examples of________________?
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A. Compound lipids

B. Not a type of lipids

C. Simple lipids

D. Derived lipids

622. Group VIB of transition elements contains___________________?
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A. Mn Te Re

B. Zn Cd Hg

C. Cr Mo W

D. Fe Ru Os

623. The relative lowering of vapour pressure is directly proportional to molality if the solution is________________?
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A. all of the above

B. saturated solution

C. dilute

D. concentrated

624. Lead accumulators are_______________?
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A. secondary cell

B. primary cell

C. voltaic cell

D. both A & C
625. Which of the following is not primary pollutant__________________?
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A. SO3

B. CO

C. H2SO4

D. NO

626. Biocatalytical proteins are_________________?
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A. Lipids

B. Enzymes

C. Substrate

D. any of above

627. Which of the following is a macro nutrient ?
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A. copper

B. iron

C. carbon

D. boron

628. Which one of the following is an inorganic fertilizer ?
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A. manure

B. urea

C. All

D. ammonium nitrate
629. The solution which distils over with change in composition________________?
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A. ideal solution

B. zeotropic solution

C. azeotropic solution

D. non-ideal solution

630. In complex compounds the oxidation number is written in___________________?
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A. Hebrew

B. English

C. Roman numeral

D. Greek

631. The species which donate two electron pairs in a coordination compound is called__________________?
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A. ligand

B. poly-dentate ligand

C. bi-dentate ligand

D. mono-dentate ligand

632. The melting points and boiling points upto meddle of 3d- series ____________________?
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A. no regular trend

B. increases

C. remain same

D. decreases

633. Which has maximum oxidation number ?
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A. S

B. Mn

C. Cr

D. N

634. When an active metal like Al comes in contact with less active element like Cu then it produces__________________?
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A. A and B

B. galvanic cell

C. dry cell

D. electrolytic cell

635. Solution having the property of a very little change in pH on adding a small amount of strong acid or base is called________________?
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A. neutral solution

B. buffer solution

C. normal solution

D. standard solution

636. Carbohydrates are polyhydroxy compounds of___________________?
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A. Glucose

B. Glyceraldehydes

C. Aldehydes and ketones

D. Oligosaccharides

637. Regular coiling or zigzagging of polypeptide through hydrogen bonding is its_______________?
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A. Quantum structure

B. Tertiary structure

C. Secondary structure

D. Primary structure

638. Which statement is incorrect about catalyst___________________?
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A. it affects specific rate constant

B. decrease activation energy

C. specific in action

D. it is used in smaller amount

639. The fertilizers which provide single nutrient from NPK are called ___________ fertilizer?
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A. straight

B. compound

C. both a and b

D. none of the above

640. Which of the following is true in the case of Zn-Cu cell ?
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A. All are correct

B. E0red of copper electrode is less than that of zinc electrode

C. Zinc acts as an anode and copper as cathode

D. The flow of electrons takes place from copper to zinc