A Chloro derivative (A) on treatment with Zn/Cu couple gives a hydrocarbon with five C-atoms when 'A' is dissolved in ether and treated with Sodium, 2,2,5,5 tetramethyl hexane is obtained. What is the original compound 'A'?

An organic compound 'A' having molecular formula C_6H_6O gives a characteristic colour with aqeuous FeCI_3 solution. When 'A' is treated with CO_2 and NaOH at 400K under pressure 'B' is obtained. The compound B on acidification gives compound C which react with acetyl chloride to form D which is a popular pain killer. Deduce the structure of A, B, C and D.

An optically active amide (A)C_5H_(11)NO on acid hydrolysis gives an acid and NH_3 . When (A) is treated with bromide and alkali a compound is obtained which one treatment with nitrous acid gives an optically active alcohol and nitrogen. The alcohol gives positive iodoform test. What is the structure of A and show the reactions involved.

An organic compound X(C_2H_4O) , on oxi-dation, gives Y(C_2H_4O_2) . Compound (X) undergoes haloform reaction. On treatment with HCN, compound (X) produces Z which on hydrolysis, gives 2-Hydroxypropanoic acid. Write the equation for the reactions involved. What happens when X is treated with dilute NaOH?

An alkyl compound (C_5H_(11)X) is an optically active compound. The compound was treated with metallic magnesium in ether and the product on treatment with ethanol produces 2-methyl-butane. Write all the reactions and find out the structure of the alkyl halide

Why aniline gives 2,4,6 tribromo aniline when reacts with bromine in aqueous medium? If we want to obtain monobromo derivative what should we do?

An organic compound A on treatment with ethanol yields a carboxylic acid B and a neutral compound C.On hydrolysis, C produces B and another compound D. D on oxidation produces B, which on heating with Ca (OH)_2 gives E (C_3H_6O) E form 2,4 Dinitrophenyl hydrazone derivatives but does not show Fehling test.

A brass rod of length 50 cm and diameter 3.0 mm is joined to a steel rod of the same length and diameter. What is the change in length of the combined rod at 250 ^@C , if the original lengths are at 40.0 ^@C ? Is there a ‘thermal stress’ developed at the junction? The ends of the rod are free to expand (Co-efficient of linear expansion of brass = 2.0 xx 10^-5K^-1 steel = 1.2 xx 10^-5 K^-1) .

Three electrolytic cells A, B and C containing electrolytes ZnSO_4 , AgNO_3 and CuSO_4 respectively were connected in series. A steady current of 1.5A was passed through them. 1.45g Ag were deposited at the cathode of cell B.What mass of copper and zinc were deposited? (Atomic mass of Cu = 63.5u, Zn = 65.3u, Ag = 108u.)

A brass sheet has a circular hole of diameter 3 cm at 30°C .What will be the change in diameter of the hole when it is heated to 120°C ?Given alpha_brass= 2 *10^ -5°C^-1 .

What happens when C_2H_5Br+2Na+BrC_2H_5 overset(dry ether)rarr ?