Multiple Choice QuestionsThe function of Fe(OH)3 in the contact process is :
to remove arsenic impurity
to detect colloidal impurity
to detect colloidal impurity
to remove dust particles
Consider the following statements :
I. Increase in concentration of reactant increases the rate of a zero order reaction
II. Rate constant k is equal to collision frequency A , if Ea =0
III. Rate constant k is equal to collision
frequency A , if Ea = ∞
IV. ln k vs T is a straight line
V. ln k vs 1/T is a straight line
Correct statements are :
I and IV
II and V
III and IV
II and III
Which of the following isomeric heptanes can yield seven different monochlorinated products upon free radical chlorination?
3-methyl hexane
2, 2-dimethyl pentane
2-methyl hexane
2, 3-dimethyl pentane
The compound which is not formed during the dry distillation of a mixture of calcium formate and calcium acetate is :
methanal
propanal
propanone
ethanal
Arrange the following in the increasing order of their basic strengths :
CH3NH2 , (CH3)2NH , (CH3)3N , NH3
NH3 < (CH3)3N < (CH3)2NH < CH3NH2
NH3 < (CH3)3N < CH3NH2 < (CH3)2NH
(CH3)3N < NH3 < CH3NH2 < (CH3)2NH
CH3NH2 < (CH3)2NH < (CH3)3N < NH3
What is the correct order of acidity from weakest to strongest acid for these compounds :
I < IV < III < II
III < IV < III < II
IV < I < III < II
II < III < I < IV
D.
II < III < I < IV
Benzoic acid is more acidic than phenol , because it is more resonance stabilised and the negative charge on the carboxylate ion is delocalised over two oxygen atoms.
Phenol is more acidic than CF3CH2OH, because of its resonance stabilised phenoxide ion. Further more, CF3CH2OH is more acidic as compared to benzyl alcohol, because of the presence of more electron withdrawing groups. Thus, the correct order of acidity is :
The correct order of reactivity of the three halides ethyl chloride (I), iso-propyl chloride (II) and benzyl chloride (III) in SN1 reaction is :
I > II > III
III > II >I
II > I > III
I > III > II
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