Aromatic aldehydes undergo disproportionation in presence of sodium or potassium hydroxide to give corresponding alcohol and acid. The reaction is known as
Ethylene may be obtained by the treatment of concentrated H₂SO₄ and X at 160-1700C. X is
Which one of the following can be oxidised to the corresponding carbonyl compounds?
Which alkene gives the same product by the Markownikoff's and anti-Markownikoff's method
Wurtz reaction involves the interaction of alkyl halides in dry ether with
Among the following pairs, the one which illustrates the law of multiple proportions is
The reaction, CH₂ = CH-CH₃ + HBr → CH₃CHBr - CH₃ is
Enzymes are made up of
Cellulose is a polymer of
Which of the following statement is false?
When propanamide reacts with Br2 and NaOH then which of the following compounds is formed ?
A carboxylic acid is converted into its anhydride using
Formic acid when treated with H₂SO₄ gives
A liquid is in equilibrium with its vapour at its boiling point. The molecules in these two phases will have equal
The rate of forward reaction is two times that of the reverse reaction at a given temperature and identical concentration, K equilibrium is
A Carnot engine, whose efficiency is 20% receives heat at 450 K. If its efficiency is increased to 30%, then the intake temperature for the same exhaust temperature is
Heat of formation of acetylene is
A neutral fertilizer among the following compounds is
The enthalpy of a solution of KNO3 is + 35.64 kJ. This denotes
Which type of isomerism,is shown by 2,3-dichloro butane ?
Prussian blue is obtained by mixing together aqueous solution of Fe3+ salt with
Which of the following is produced by reaction of RCN in sodium and alcohol ?
Time required to deposit one milli mole of aluminium metal by the passage of 9.65 amperes through aqueous solution of aluminium ions is
The colour of p-aminoazobenzene is
The diamagnetic species is :
Law of electrolysis was given by
The equivalent conductivity of 0.1 M weak acid is 100 times less than that at infinite dilution. The degree of dissociation is
Which of the following method is used for the purification of titanium?
When ether is exposed in air for sometime an explosive substance produced is
The volume of 2.8 g of CO at 270C and 0.821 atm. pressure is (R=0.0821 lit. atm mol-1K-1)
Method used for obtaining highly pure silicon used as a semiconductor material, is
P4O10 has short and long P-O bonds. The number of short P-O bonds in this compound is
P4O10 has four P = O bonds which are shorter than P-O single bonds.
Each P atom has three P-O single bonds and one P = O bond, i.e.,
a total of four P-O linkages
The oxidation state of Cr in k₂Cr₂O₇ is
When lightning flash is produced through air, the gas formed is
Which of the following describes the hexagonal close packed arrangement of spheres ?
The migration of colloidal solute particles in a colloidal solution, when an electric current is applied to the solution is known as
Sodium thiosulphate is used in photography because of its
Carbonyl compounds react with NH2OH forming oximes which represent syn-anti geometrical isomerism. Which carbonyl compound forms oxime but does not show syn-anti geometrical isomerism?
Nessler's reagent is