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Byju's Answer

Standard XII

Chemistry

Preparations and Uses of Caustic Soda

P Q R sweet ...

Question

$P a l k . K M n O_{4, Δ} - -------- \to$ Q $+ P - - \to$ R (sweet smelling substance) R gives back P and Q on saponification. Identify P and Q respectively:

C H_{4}, C H_{2} = C H_{2}

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C H_{3} - C H_{2} O H, C H_{2} = C H_{2}

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C H_{3} - C O O H, C H_{3} C O O C_{2} H_{5}

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C H_{3} - C H_{2} - O H, C H_{3} C O O H

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Solution

The correct option is C $C H_{3} - C H_{2} - O H, C H_{3} C O O H$
Reaction:
$C H_{3} - C H_{2} - O H a l k . K M n O_{4, Δ} - -------- \to C H_{3} C O O H + C H_{3} - C H_{2} - O H - ---------- \to C H_{3} C O O C_{2} H_{5}$

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Similar questions

Q. Examine the given structural formula and select the esters. You may also identify the chemical required for their preparation.
1.

C H_{3} - C H_{2} - C O O - C H_{3}

C H_{3} - C H_{2} - C O O H

C H_{3} - C H_{2} - C O - C H_{3}

C H_{3} - O H

C H_{3} - C H_{2} - C H_{2} O H

C H_{3} - C O O H

C H_{3} - C O O - C H_{2} - C H_{2} - C H_{3}

Q. Identify the type of the following reaction of carbon compounds.
a. CH₃ -CH₂ -CH₂-OH → CH₃ -CH₂ -COOH
b. CH₃ -CH₂ -CH₃ → 3CO₂ + 4H₂O
c. CH₃ -CH = CH -CH₃ + Br₂ → CH₃ -CHBr - CHBr -CH₃
d. CH₃ -CH₃ + Cl₂→ CH₃ -CH₂ -Cl + HCl
e. CH₃-CH₂ -CH₂ -CH₂ -OH → CH₃ -CH₂ -CH=CH₂ + H₂O
f. CH₃-CH₂ -COOH + NaOH → CH₃ -CH₂ -COO - Na⁺ + H₂O
g. CH₃ -COOH + CH₃ -OH → CH₃ -COO- CH₃ + H₂O

Q. Three equations are given below.

(i) C H_{3} - C H_{2} - C H_{2} - C H_{3} T h e r m a l C r a c k i n g - ---------- \to C H_{3} - C H_{3} + P

(i i) P + H_{2} H_{2} - \to Q

(i i i) Q + C l_{2} S u n l i g h t - ---- \to R

Identify

P, Q, R

Q. Name the functional groups present in the following compounds.
(i)

{C H}_{2} - C O - C H_{2} - {C H}_{2} - {C H}_{2} - {C H}_{3}

(ii)

{C H}_{3} - C H_{2} - {C H}_{2} - C O O H

(iii)

{C H}_{3} {- C H}_{2} - {C H}_{2} - {C H}_{2} - C H O

(iv)

{C H}_{3} - {C H}_{2} - O H

Name the functional groups present in the following compounds: [5 MARKS]

1. ${CH}_{3} - {CH}_{2} - {CH}_{2} - OH$
2. ${CH}_{3} - {CH}_{2} - {CH}_{2} - COOH$
3. ${CH}_{3} - {CH}_{2} - CHO$
4. ${CH}_{3} - CO - {CH}_{2} - {CH}_{3}$
5. ${CH}_{3} - {CH}_{2} - CO-OH$

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Palk.KMnO4,Δ−−−−−−−−−→ Q+P−−→R (sweet smelling substance) R gives back P and Q on saponification. Identify P and Q respectively:

The correct option is C CH3−CH2−OH,CH3COOHReaction:CH3−CH2−OHalk.KMnO4,Δ−−−−−−−−−→CH3COOH+CH3−CH2−OH−−−−−−−−−−−→CH3COOC2H5

$P a l k . K M n O_{4, Δ} - -------- \to$ Q $+ P - - \to$ R (sweet smelling substance) R gives back P and Q on saponification. Identify P and Q respectively:

The correct option is C $C H_{3} - C H_{2} - O H, C H_{3} C O O H$
Reaction:
$C H_{3} - C H_{2} - O H a l k . K M n O_{4, Δ} - -------- \to C H_{3} C O O H + C H_{3} - C H_{2} - O H - ---------- \to C H_{3} C O O C_{2} H_{5}$