With respect to the reagents given below, pick out the odd one _________.

(a)

P₂O₃

(b)

P₂O₅

(c)

H₂SO₄

(d)

K₂Cr₂O₇

Formic acid contains _______ groups

(a)

aldehyde

(b)

carboxylicacid

(c)

alcohol

(d)

both (a) and (c)

acid chloride + alcohol \(\longrightarrow\)?.

(a)

acids

(b)

amides

(c)

esters

(d)

amines

CH₃CHO and C₆H₅CH₂CHO can be distinguished by ______.

(a)

Tollens reagent

(b)

Fehlings solution

(c)

Benedict

(d)

Iodoform test

\(Phenol\overset { Zn }{ \underset { dust }{ \longrightarrow } } 'X'\overset { { CH }_{ 3 }Cl }{ \underset { anhy\ AlC{ I }_{ 3 } }{ \longrightarrow } } Y\overset { alk }{ \underset { { KMnO }_{ 4 } }{ \longrightarrow Z } } \) the product Z is __________.

(a)

benzaldehyde

(b)

benzoic acid

(c)

benzone

(d)

toluene