Name reaction or reagent used to prepare an aldehyde (Rosenmund, Stephen, Etard, Gattermann-Koch)

1. A.
   ${CrO}_{3}/$ acetic acid, $H_{3}O^{+}$
2. B.
   ${CrO}_{3}$ /acetic anhydride, $H_{3}O^{+}$
3. C.
   ${KMnO}_{4}/HCl,H_{3}O^{+}$
4. D.
   $CO/HCl$, anhydrous ${AlCl}_{3}$

Tap an option to check your answer.

1. A.
   (A)-(IV), (B)-(III), (C)-(II), (D)-(I)
2. B.
   (A)-(I), (B)-(II), (C)-(III), (D)-(IV)
3. C.
   (A)-(II), (B)-(III), (C)-(IV), (D)-(I)
4. D.
   (A)-(III), (B)-(II), (C)-(I), (D)-(IV)

Tap an option to check your answer.

1. A.
   $A - {CrO}_{3}$ $B - {CrO}_{3}$
2. B.
   $A - {CrO}_{3}$ $B - {CrO}_{2}{Cl}_{2}$
3. C.
   $A - {CrO}_{2}{Cl}_{2}$ $B - {CrO}_{2}{Cl}_{2}$
4. D.
   $A - {CrO}_{2}{Cl}_{2}$ $B - {CrO}_{3}$

Tap an option to check your answer.

1. A.
   Rosenmund reduction
2. B.
   Wolff-Kishner reduction
3. C.
   Stephen reduction
4. D.
   Etard reduction

Tap an option to check your answer.

1. A.
   Stephen reaction
2. B.
   Etard reaction
3. C.
   Gatterman-koch reaction
4. D.
   Rosenmund reduction

Tap an option to check your answer.

1. A.
   A $=$ $C_{6}H_{5}CHO$, B $=$ $C_{6}H_{5}COOH$
2. B.
   A $=$ $C_{6}H_{5}CH(OCrOHCl_{2})_{2}$, B $=$ $C_{6}H_{5}CHO$
3. C.
   A $=$ $C_{6}H_{5}CHO$, B $=$ $C_{6}H_{5}COONa$
4. D.
   A $=$ $C_{6}H_{5}CH(OH)SO_{3}Na$, B $=$ $C_{6}H_{5}CHO$

Tap an option to check your answer.

1. A.
   (A)-(IV), (B)-(III), (C)-(I), (D)-(II)
2. B.
   (A)-(III), (B)-(IV), (C)-(II), (D)-(I)
3. C.
   (A)-(I), (B)-(III), (C)-(II), (D)-(IV)
4. D.
   (A)-(III), (B)-(IV), (C)-(I), (D)-(II)

Tap an option to check your answer.

1. A.
   A-II, B-III, C-IV, D-I
2. B.
   A-IV, B-III, C-I, D-II
3. C.
   A-IV, B-I, C-II, D-III
4. D.
   A-II, B-IV, C-I, D-III

Tap an option to check your answer.