Which discovery caused a revision in the periodic law as stated by Mendeleev ?
A. Location of nucleus by Rutherford
B. Atomic number by Moseley
C. X-rays by Roentgen
D. Natural radioactivity by Henry Bacquerel.
Submitted by :- Jamil Ahmed
Which one of the following is not a periodic property ?
A. Melting point of elements
B. Boiling point of elements
C. Ionization energy of elements
D. Coordination number of ions
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The complete reduction carboxylic acid results in the formation of________________?
A. Alkyne
B. Alkene
C. Alkane
D. Alcohol
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Carboxylic acid reacts with ammonia to form ammonium salts which on heating produces_______________?
A. CO2 C. Ester
B. Alkane D. Acidamide
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The test which is used for the identification of amino-acids is_________________?
A. Ninhydrin test
B. Molisch test
C. Biuretic test
D. Benedict test
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The organic acid that does not has COOH group is___________________?
A. phthalic acid
B. carbolic acid
C. Maleic acid
D. Succinic acid
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In the formation of Zwitter ions proton goes from____________________?
A. Carboxyl to amino group
B. Amino to carboxyl group
C. Amino group only
D. Carboxyl group only
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The common thing in phthalic acid and oxalic acid is that both are_________________?
A. Aromatic
B. Dicarboxylic
C. Hydrocarbons
D. Strong acids
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When – COOH is attached directly to the benzene ring the acid is called__________________?
A. Aliphatic
B. Alicyclic
C. Carboxylic
D. Aromatic
Submitted by :- Jamil Ahmed
Keeping in view the size of atom which order is correct one ?
A. Mg > Sr
B. Ba > Mg
C. Lu > Ce
D. C1 > I
Submitted by :- Jamil Ahmed