Boron is non-Metal whereas A1 is metal. It is due to_______________________?
A. Small size
B. High nuclear charge
C. Both A and B
D. No authorized justification yet
Submitted by :- Jamil Ahmed
CHEMISTRY
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Ozonolysis of benzene produces___________________?
A. Glycol
B. Glyoxal
C. Vicinal diol
D. Both B & C
Submitted by :- Jamil Ahmed
The preparation of benzene from acetylene can also be said as_________________?
A. Oxidation
B. Polymerization
C. Dehydration
D. Condensation
Submitted by :- Jamil Ahmed
Benzene is heated in air with V2O5 at 450°C it undergoes________________?
A. Substitution reaction
B. Addition reaction
C. Elimination reaction
D. Oxidation reaction
Submitted by :- Jamil Ahmed
Nitronium ion is___________________?
A. NO3
B. NO
C. NO2-
D. NO2+
Submitted by :- Jamil Ahmed
Benzene does not undergo___________________?
A. Substitution reaction
B. Addition reaction
C. Polymerization reactions
D. Oxidation reactions
Submitted by :- Jamil Ahmed
Acetophenone is a_____________________?
A. Ether
B. Ketone
C. Aldehyde
D. Ester
Submitted by :- Jamil Ahmed
Which of the following will decompose to produce litharge_________________?
A. Pb2O
B. Pb3O4
C. PbO2
D. All of the above
Submitted by :- Jamil Ahmed
If temperature of gallium arsenide is increased then its conductivity will___________________?
A. decrease
B. increase
C. remains constant
D. first decreases then increases
Submitted by :- Jamil Ahmed
The coloured glassy mass in borax bead test is due to the formation of___________________?
A. metal borate
B. metal meta borate
C. metal boride
D. metal silicate
Submitted by :- Jamil Ahmed