chemistry MCQs – Page 26

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 Review each marked answer and report any item that may be outdated or unclear.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
501. Nucleic acids direct the synthesis of__________________?
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A. Proteins

B. Triglycerides

C. All

D. Glucose

502. Calcarious material includes_________________?
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A. chalk

B. lime stone

C. all of the above

D. marble

503. In electrolytic solution conductance of electricity is due to _____________________?
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A. electrodes

B. ions

C. free electrons

D. metals

504. The pH of 10-3 mol dm-3 of an aqueous solution of H2SO4 is_________________?
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A. 2.7

B. 3

C. 1.5

D. 2

505. Equilibrium state is achieved quickly by the addition of ________________?
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A. base

B. acid

C. reactants

D. catalyst
506. By decreasing the pressure the reaction will go to that direction where_________________?
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A. volume increased

B. heat absorbed

C. volume is decreased

D. no. of moles of specie decreased

507. Which of the following is typical transition metal ?
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A. Co

B. Y

C. Sc

D. Cd

508. Which one of the following fertilizers provides the nitrogen and phosphorus to the plant ?
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A. potassium nitrate

B. calcium superphosphate

C. urea

D. diammonium phosphate
509. Orgosterol is__________________?
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A. Sterol

B. all of the above

C. Orgocalciferol

D. Vitamin D2

510. For the measurement of standard electrode potential Zn is dipped in________________?
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A. 0.1 M ZnSO4 solution

B. 1 M ZnSO4 solution

C. 1 M ZnO solution

D. 1.5 M ZnSO4 solution

511. Hydration is a process in which_________________?
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A. Molecules are surrounded by solvent molecules

B. Ions are surrounded by solvent molecules

C. Both ions and molecules are surrounded by solvent molecules

D. Both ions and molecules are surrounded by water molecules
512. Requirement of macronutrient per acre of the land is_________________?
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A. 200-400 kg

B. 30-400 kg

C. 20-200 kg

D. 5 to 200 kg
513. Hydrolysis of an oligosaccharide in the presence of acid yields________________?
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A. 2-9 monosaccharide unit

B. many monosaccharide

C. No monosaccharide unit

D. one monosaccharide unit

514. Energy of reactant higher than energy of product favours A. Endothermic_______________?
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A. No reaction

B. Moderate reaction

C. Exothermic
515. The fertility of the soil is improved by________________?
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A. Adding manure and growing legumes

B. All

C. Adding lime to the acid salts

D. Rotation of the crops

516. Non-stoichiometric compounds of transition elements are called___________________?
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A. hydrides

B. binary compounds

C. interstitial compounds

D. hydrates

517. In case of gases Kc is replaced by_______________?
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A. K

B. Ka

C. Kp

D. Kb

518. The strength of solution of an element whose electrode potential is to be measured is________________?
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A. 1M

B. 1m

C. 2M

D. 1N

519. Enzymes from the same organism which catalyze same reaction but are chemically and physically distinct from each other are called______________?
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A. Oxidoreductases

B. Isomerases

C. Hydrolases

D. Isoenzymes
520. Number of moles in 1 kg of solvent is called_________________?
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A. molarity

B. molality

C. normality

D. mole fraction