Acetaldehyde gives orange coloured precipitate on treatment with
(A) 2,4- DNP
(B) \(NH_{2}\)OH
(C) \(NaHSO_{3}\)
(D) NaOH

The reagent that gives an orange coloured precipitate with acetaldehyde is

Which gives orange color with 2,4 DNP?

Acetaldehyde reacts with DNP to give orange/black precipitate.

A substance X containing three carbon atoms gives white crystalline precipitate with sodium sulphite but does not give red precipitate with Fehling solution. On treatment with NH_(2)-NH_(2)//KOH , X wil yield

A hydrated salt (x) gives golden yellow colour in flame test, given basic gas on treatement with NaOH , gives yellow ppt. on treatment with (NH_(4))_(2)MoO_(4) and HNO_(3) . It gives blue bead with Co^(2+) salt. The salt (x) is:

Which of the following is correct ? Aqueous solution of Na_2S_2O_3 on reaction with Cl_2 gives ? (a) Na_2S_4O_6 (b) NaHSO_4 (c) NaCl (d) NaOH (ii) Acidic solution of Na_(2)S_(2)S_(2)O_(3) on reaction with Cl_(2) gives (a) Na_(2)S_(4)O_(6) (b) NaHSO_(4) NaSO_(4) (d) NaOH (iii) Basic solution of Na_(2)S_(2)O_(3) on reaction with Cl_(2) gives (a) NaOH (b) Na_(2)S_(4)O_(6) (c) Na_(2)SO_(4)^(oplus) (d) NaHSO_(4)

Give the decreasing order of basic strength of the following : (a) NH_3 (b) NH_2OH ( c) NH_2-NH_2 .

FeCl_(3) is acidic towards litmus. On treatment with excess of NH_(4)SCN it gives red coloured compound (A) and on treatment with excess of K_(2)Cr_(2)O_(7) in the presence of conc. H_(2)SO_(4) , it evolves deep red vapours of (B) on passing the vapours of (B) into NaOH , then adding a solution of acetic acid and lead acetate it gives yellow ppt. of compound of chromium (C) What is the hybridisation of chromium in compound (C) ?