8. What will be the order of reactivity of following towards HCN; formaldehyde Propionaldehyde Acetone Ethyl methyl ketone

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Arrange the following compounds in increasing order of their property as indicated :

Acetaldehyde, acetone, di-tert-butyl ketone, methyl torl-butyl ketone (reactivity towards HCN).

$C H_{3} C H_{2} C H (B r) C O O H, C H_{3} C H (B r) C H_{2} C O O H, (C H_{3})_{2} C H C O O H, C H_{3} C H_{2} C H_{2} C O O H {(a c i d s t r e n g t h)}$

Benzoic acid, 4 - nitrobenzoic acid, 3, 4 - dinitro benzoic acid, 4 - methoxy benzoic acid (acid strength).

Q. (a) Give chemical tests to distinguish between :
(i) Propanol and propanone
(ii) Benzaldehyde and acetophenone
(b) Arrange the following compounds in an increasing order of their property as indicated:
(i) Acetaldehyde, acetone, methyl tertbutyl ketone (reactivity towards

H C N

)
(ii) Benzoic acid, 3,4-dinitrobenzoicacid, 4-methoxybenzoic acid (acid strength)
(iii)

C H_{3} C H_{3} C H (B r) C O O H, C H_{3} C H (B r) C H_{2} C O O H, (C H_{3})_{2} C H C O O H

(acid strength)

Q. Arrange the following compounds in the increasing order of their reactivity towards HCN.
I. Acetaldehyde
II. Acetone
III. Methyl-tert-butyl ketone
IV. Di-tert-butyl ketone

Q. Out of the following compounds, the number of compounds which give a positive haloform test is
(a) Ethanol
(b) Methanol
(c) Acetaldehyde
(d) Acetone
(e) Formaldehyde
(f) Propanaldehyde
(g) 3-pentanone
(h) 2-pentanone

Q. Which of the following on oxidation gives ethyl methyl ketone :-

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