chemistry MCQs – Page 34

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 Review each marked answer and report any item that may be outdated or unclear.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
661. Cement is a mixture of________________?
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A. lime stone and gypsum

B. clay lime stone and gypsum

C. lime stone and clay

D. clay and clinker

662. Animal fats are located particularly in__________________?
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A. Adipose tissues

B. Connective tissues

C. Skeleton tissues

D. Cardiac tissues

663. 10ml of alcohol dissolve in 90ml of water unit of concentration used is________________?
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A. % v/w

B. % w/w

C. % v/v

D. % w/v

664. The determination of correct molecular weight from Raoults law is applicable to_________________?
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A. a non-electrolyte & non volatile solute in concentrated solute

B. a volatile solute in dilute solution

C. non volatile solute in a dilute solution

D. a non-electrolyte & non volatile solute in concentrated solution

665. Which of following is not a base______________?
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A. PH3

B. KOH

C. NH3

D. BF3
666. Which of the following type of reaction is 3rd order reaction_________________?
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A. 2FeCl3 + 6KI ? 2FeI2 + 6KCl + I2

B. None of these

C. 2N2O5 = 2N2O4 + O3

D. NO + O3 ? NO2 + O2

667. The nitrogenous base different in RNA as compared to DNA is_________________?
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A. Adenine

B. Guanine

C. Cytosine

D. Thymine
668. Lipids are soluble in___________________?
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A. Solubility has nothing to do with lipids

B. Organic and inorganic solvents

C. Organic solvents

D. Inorganic solvents

669. What will be the pressure of 1 mole of an ideal gas maintained at 300 K and 250cm3 volume ?
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A. 97.1 atm

B. 98.5 atm

C. 95.8 atm

D. 96.7 atm

670. The molal boiling point constant is the ration of the elevation of boiling point to____________________?
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A. Molarity

B. Mole fraction of solute

C. Molality

D. More fraction of solvent

671. Conjugated base of a weak acid is_________________?
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A. strong

B. unstable

C. weak

D. moderately weak

672. Beckmanns apparatus is used to measure_______________?
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A. lowering of osmotic pressure

B. boiling point elevation

C. depression in freezing point

D. lowering of vapour pressure

673. Protein attached to some non protein group is called____________________?
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A. Conjugated protein

B. Derived protein

C. Sample protein

D. Proteoses

674. The potassium present in plant help the plant to___________________?
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A. ripen the seeds and fruits

B. form starch sugar and fibrous material

C. increase the resistance against disease

D. all the above statements are correct
675. The location of transition elements is in between__________________?
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A. chalcogens and halogens

B. d and f block elements

C. s and p block elements

D. lanthanides & actinides

676. Which of the following element act as inert electrode________________?
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A. None

C. Pt

D. Ag

677. The reduction potential Zn is_________________?
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A. -0.55

B. 0.55

C. -0.76

D. 0.76

678. Chemical used in salt bridge is________________?
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A. KNO3

B. KCI

C. KOH

D. KBr

679. Which one of the following is a buffer solution ?
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A. brine

B. solution of CuSO4

C. blood

D. glue

680. In galvanic cell Zn acts as an anode so its value of standard reduction potential in comparison to coupled electrode would be________________?
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A. none

B. greater

C. lesser

D. sum of reduction and oxidation potentials