Yellow crystals of lodoform is given by
(A) secondary amyl alcohol
(B) benzophenone
(C) di isoprppyl ketone
(D)methyl benzyl ketone

A mixture of benzaldehyde and formaldehyde on heating with aqueous NaOH solution gives (A) Benzyl alcohol and sodium formate (B) Sodium benzoate and methyl alcohol (C) Sodium benzoate and sodium formate (D) Benzyl alcohol and methyl alcohol

In each of the following pairs of compounds, which will give iodoform test ? (a) Sec-butyl alcohol and tert-butyl alcohol (b) Ethyl alcohol and isopropyl alcohol (c) Formaldehyde and acetaldehyde (d) Methylpropyl ketone and diethyl ketone.

Some statements are give below : A. For Formaldehyde with ammonia gives an antiseptic used in urinary infection B. A ketone on treatment with Grignard's reagent, followed by hydrolysis, yield a secondary alcohol. C. Benzaldehyde gives aldol condensation. D. Aldehydes and ketones, both give crystalline derivatives with hydroxylamine .Among the above, the false statements are :

(A) Pentanone-3 does not give yellow pricipitate of iodoform with I_(2)//NaOH whereas Pentanone-2 gives a yellow precipitate of iodoform with I_(2)//NaOH . (R) Compound containing (CH_(3)-CO-) group i.e., methyl ketones or alcohols which on oxidation yield an aldehyde or ketone with CH_(3)CO- group undergo Haloform reaction.

Primary and secondary alcohols are dehydrogenated by copper at 573 K to aldehydes and ketones respectively. In contrast tertiary alcohols are dehydrated to alkenes by heating with copper at 573 K. Similarly, primary alcohols are easily oxidised to form first an aldehyde and then a carboxylic acid while secondary alcohols are oxidised to ketones which are further oxidised to form a mixture of acids. Tertiary alcohols are oxidised with difficulty and with strong oxidising agents in acidic medium. They form first ketones and then acids. In the case of alcohols containing carbon-carbon double bond, some oxidising agents oxidise both double bond and OH group while other reagents donot affect C-Chond. The reagent which oxidises 1^(@) alcohol to aldehyde without affecting C=C double bond is