chemistry MCQs – Page 36

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 Review each marked answer and report any item that may be outdated or unclear.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
701. Which order of reaction obeys the relation t1/2 = 1/Ka____________________?
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A. Third order

B. Second order

C. First order

D. Zero order

702. Which one of the following compounds usually smells like garlic ?
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A. P2O3

B. All have same smell

C. H3PO3

D. P2O5

703. Which one of the following carbonate is water insoluble ?
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A. K2CO3

B. CaCO3

C. Na2CO3

D. (NH4)2CO3

704. Boron is non metal while other elements of IIIA group are metals. This is because______________?
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A. it has small size

B. it forms molecular addition compounds

C. all of the above

D. it has high nuclear charge

705. The reaction of carboxylic acids with alcohols in presence of cone. H2SO4 is called _________________?
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A. esterification

B. neutralization

C. hydrolysis

D. saponification

706. Ozonolysis of benzene produces___________________?
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A. Glycol

B. Glyoxal

C. Vicinal diol

D. Both B & C

707. Second ionization potential of alkali metals are very high due to_______________?
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A. being metals

B. ns1 electronic configuration

C. being s-block elements

D. inert gas configurations
708. Greater the conc. Of reactant__________________?
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A. any of above

B. Lesser will be dx/dt

C. dx/dt will be moderate

D. Greater will be dx/dt
709. Picric acid is_________________?
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A. dicarboxylic acid

B. monocarboxylc acid

C. aromatic carboxylic acid

D. none of these
710. In the formation of Zwitter ions proton goes from____________________?
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A. Amino to carboxyl group

B. Carboxyl to amino group

C. Carboxyl group only

D. Amino group only

711. Aqueous solution of borax above 62C gives crystals of________________?
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A. Na2B4O7.2H2O

B. Na2B4O7.5H2O

C. Na2B4O7.4H2O

D. Na2B4O7.10H2O

712. Which one is natron ?
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A. Na2CO3

B. NaHCO3

C. Na2CO3.H2O

D. Na2CO3.10H2O

713. Which of the following is the strongest acid ?
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A. Propanoic acid

B. Formic acid

C. Water

D. Acetic acid

714. Halides in which halogen atoms act as a bridge between two atoms of the other element are called___________________?
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A. Covalent halides

B. Polymeric hydrides

C. Polymeric halides

D. Electronegative halides

715. Which one of the following alkali metals forms only normal oxide when it reacts with O2 ?
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A. Sodium

B. Potassium

C. Lithium

D. Rubidium

716. Sum of exponents of molar concentration is called___________________?
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A. Order of reaction

B. Rate of reaction

C. Average of reaction

D. Molecularity

717. Phosphorus is a Greek word and it means_________________?
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A. Tetrahedral

B. Fire

C. Light bearing

D. Impure

718. Dry distillation of calcium acetate results in the formation of_________________?
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A. methane

B. acetaldehyde

C. acetone

D. formaldehyde

719. Which one of the following pairs shown diagonal relationship in the periodic table ?
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A. Sodium and Lithium

B. Lithium and magnesium

C. Lithium and beryllium

D. Boron and Beryllium

720. The coloured glassy mass in borax bead test is due to the formation of___________________?
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A. metal silicate

B. metal borate

C. metal meta borate

D. metal boride