chemistry MCQs – Page 37

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 Review each marked answer and report any item that may be outdated or unclear.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
721. Acetophenone is a_____________________?
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A. Aldehyde

B. Ketone

C. Ether

D. Ester

722. Formaldehyde and lactose are combined to produce throat lozenges named as__________________?
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A. formalactose

B. formamint

C. lactomint

D. aldomint

723. All the elements in group VIA are ___________________ in nature?
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A. metals

B. all of above

C. polymeric

D. hygroscopic

724. Carboxylic acid on reduction with HI / phosphorous yields_________________?
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A. ketones

B. alcohols

C. aldehydes

D. alkane
725. Which of the following will not give addition reaction with NaHSO3________________?
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A. None of the above

B. CH3-CH2-CHO

C. CH3CHO

D. HCHO

726. Tetrahydroborate ion is the source of_______________?
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A. proton

B. H+

C. both A & amp; B

D. H-
727. The organic acid that can be made from ethanol is_________________?
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A. Formic acid

B. Acetic acid

C. Butanoic acid

D. Citric acid

728. Acetone reacts with HCN to form a cyanohydrin. It is an example of________________?
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A. electronphilic addition

B. nucleophilic addition

C. electrophilic substitution

D. nucleophilic substitution

729. Phosphorous acid upon thermal decomposition yields phosphoric acid and____________________?
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A. Phosphorus

B. Phosphorus pentoxide

C. Water

D. Phosphine
730. Which of the following is not a use of acetaldehyde ?
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A. formation of phenolic resins

B. formation of mirror

C. formation of throat lozenges

D. antiseptic inhalant

731. Cannizzaros reaction is not given by__________________?
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A. benzaldehyde

B. trimethyl acetaldehyde

C. acetaldehyde

D. formaldehyde

732. The common name of propane 1 3-dioic is_________________?
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A. Fumaric acid

B. Oxalic acid

C. Aromatic acid

D. Malonic acid
733. Boron in soil has been considered micronutrient for_________________?
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A. Alkalinity of soil

B. Proper growth of plants

C. All

D. Soil porocity

734. Oxygen and sulphur resemble in all except________________?
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A. Show same oxidation state

B. Polymeric

C. Electronic conviguration of valence shell electrons

D. Show allotropy

735. Addition of 2nd electron to a uni negative ion is always____________________?
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A. Endothermic

B. Exothermic

C. Unpredictable

D. Data is insufficient

736. Many properties of an element and its compounds can be predicted from the position of the element in the periodic table. What property could not be predicted in this way ?
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A. Its number of isotopes

B. The formula of its oxide

C. The charge on its ions

D. The nature of its oxides

737. Glycine is the name of an amino acid because___________________?
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A. Shining appearance

B. Bitter taste

C. Sweet taste

D. Green colour

738. Electrolysis of dilute solution of NaCl results at the anode_______________?
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A. sodium

B. chlorine

C. hydrogen

D. oxygen
739. Formalin consists of mixture of formaldehyde methyl alcohol and water Percentage of water in it is________________?
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A. 8%

B. 52%

C. 60%

D. 50%

740. Aniline is a derivative of benzene which contains__________________?
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A. Nitro group

B. Amide group

C. Amino group

D. Imino group