Which compound shows hydrogen bonding ?
Which compound shows hydrogen bonding ?
A. C2H6
B. C2H5Cl
C. CH3OCH3
D. C2H5OH
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Benzene 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 of the halogen has highest electronegativity ?
Which of the halogen has highest electronegativity ?A. Fluorine
B. Chlorine
C. Bromine
D. IodineBleaching powder is not used for bleaching________________?
Bleaching powder is not used for bleaching________________?A. Cotton
B. Costly fabrics
C. Linen
D. Paper pulbThe source of the Sun’s energy is the process of ____________?
The source of the Sun’s energy is the process of ____________?A. Photoelectric emission
B. Nuclear fission
C. Nuclear fusion
D. Thermionic emissionDistance at which attractive forces of hydrogen overcome repulsive forces is __________ ?
Distance at which attractive forces of hydrogen overcome repulsive forces is __________ ?A. 75.2pm
B. 75.3pm
C. 75.5pm
D. 75.4pmNaOH is named as caustic soda because________________?
NaOH is named as caustic soda because________________?A. It corrodes the organic tissues
B. It is used in soda water
C. It reacts with chlorine gas
D. It reacts with fats to form soap