Milikan used ______________ in his atomizer?
Milikan used ______________ in his atomizer?
A. Milk
B. Honey
C. Oil
D. Water
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The most reactive allotropic form of phosphorus is________________?
The most reactive allotropic form of phosphorus is________________?A. White
B. Redox potential
C. Black
D. VioletBenzene gives mainly_________?
Benzene gives mainly_________?A. Addition reaction
B. Substitution reactions
C. Halogenation
D. All of theseenzene is much more stable than expected.
The extra stability means that benzene will less readily undergo addition reactions. In benzene, the π-electrons are delocalised and makes the structure more stable. Thus, benzene does not give addition reactions because of resonance stabilisation.
The more loosely held electrons are open to attack by electrophiles. Hence, the characteristic reaction of benzene is electrophilic substitution.
Example: Nitration and Suphonation of Benzene. So it does not undergo Elimination reaction.Which one of the following is most acidic?
Which one of the following is most acidic?A. Phenol
B. P-nitrophenol
C. O-nitrophenol
D. M-nitrophenolThe spreading of fragrance or scent in air is due to_______________?
The spreading of fragrance or scent in air is due to_______________?A. Diffusion
B. Effusion
C. Attraction with air
D. Low dsensityThe molar mass of an organic acids is determined by____________?
The molar mass of an organic acids is determined by____________?A. Depression of freezing point
B. Volumetric method
C. Victor Meyer’s method
D. Osmosis methodCO2 is gas while SiO2 is solid at room temperature?
CO2 is gas while SiO2 is solid at room temperature?A. carbon is non-metal while silicon is semi-metal
B. CO2 is an independent molecule while SiO2 has network covalent structure
C. CO2 forms multiple bond while silicon does not form multiple bonds
D. Silicon has all sigma bonds