Which of the following air pollutants is more dangerous for ozone layer ?
Which of the following air pollutants is more dangerous for ozone layer ?
A. CFC
B. CO2
C. CO
D. Oxides of nitrogen
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At start of reaction the concentration of reactants is_______________?
At start of reaction the concentration of reactants is_______________?A. high
B. low
C. according to Kc
D. constantWhich one of the following explain the shape of orbitals _________________?
Which one of the following explain the shape of orbitals _________________?A. Principal of quantum number
B. Azimuthal quantum number
C. Magnetic quantum number
D. S quantum numberA 10 volume solution of H2O2 means_______?
A 10 volume solution of H2O2 means_______?A. 10 grams of H2O2 solution liberate 10 mL of O2 at STO
B. 10 gram equivalents of H2O2 liberates 10 mL of O2 at STP
C. 10 litres of H2O2 liberates 19 mL of O2 at STP
D. 1mL of solution of H2O2 liberates 10 mL of O2 at STPBenzene does not undergo___________________?
Benzene does not undergo___________________?A. Substitution reaction
B. Addition reaction
C. Polymerization reactions
D. Oxidation reactionsOne of the outstanding features of boron is its ability to form__________________?
One of the outstanding features of boron is its ability to form__________________?A. Molecular addition compounds
B. Molecular crystals
C. Semiconductors
D. Ionic compoundsPure metal__________________?
Pure metal__________________?A. corrode slowly
B. corrode rapidly
C. does not corrode easily
D. none of these