Which of the following process is employed to convert alkyl halide into alcohol?
Which of the following compounds will undergo self aldol condensation in the presence of cold dilute alkali?
Schiff's reagent gives pink colour with
An organic compound 'A' has the molecular formula C₃H₆O. It undergoes iodoform test. When saturated with HCl it gives 'B' of molecular formula C₉H₁₄O. 'A' and 'B' respectively are
Propene when heated with chlorine at about 500oC forms
The typical reaction of olefinic bond is
Charring of sugar is due to
The helical structure of protein is stabilized by
Irrespective of the source, pure sample of water always yields 88.89% mass of oxygen and 11.11% mass of hydrogen. This is explained by the law of
How many monochlorobutanes will be obtained on chlorination of n-butane?
Which one of the following esters is obtained by the esterification of propan-2-ol with ethanoic acid?
A chemical reaction is catalyzed by a catalyst X. Hence X
A is a higher phenol and B is an aromatic carboxylic acid. Separation of a mixture of A and B can be carried out easily by having a solution
The final product 'C' in the above reaction is
A glass bulb is filled with NO₂ gas and immersed in an ice bath at 0oC which becomes colourless after some time . This colourless gas will be
An adiabatic expansion of an ideal gas always has
The Δ H value for the reaction H2 + Cl2 → 2HCl is − 44.12 K.cal. If E1 is the activation energy of the reactants and E2 is the activation energy of the products, then for the above reaction
Calculate the heat of formation Δ H of CO (in kcal) from the following data :
C(graphite) + O2 (g) → CO2 (g) ; Δ H = − 94 K . c a l
CO(g) + 1/2O2 (g) → CO2 (g) ; Δ H = − 68 K . c a l
Which is a pair of geometrical isomers ?
The pair in which both species have the same magnetic moment (spin only value) is :
The IUPAC name for the complex [Co(NO₂)(NH₃)₅Cl₂] is
Hydrolysis of acetonitrile in acid medium gives
96500 C electricity is passed through CuSO₄. The amount of copper precipitated is
When benzenediazonium chloride in hydrochloric acid reacts with cuprous chloride, then chlorobenzene is formed. The reaction is called
The element, which forms oxides in all oxidation states + 1 to + 5, is
The e.m.f. of a galvanic cell with electrode potentials of Al equal to -1.66 V and that of Mg equal to - 0.54 V is
E.M.F. can be positive only if oxidation takes place at Mg-electrode. But here the reduction reaction takes place.
Which of the following metal is leached by cyanide process?
Acetic anhydride reacts with diethyl ether in the presence of anhydrous AlCl₃ to give
At which one of the following temperature-pressure conditions, the deviation of a gas from ideal behaviour is expected to be minimum ?
Which among CH₄, SiH₄, GeH₄ and SnH₄ is most volatile?
The oxidation state of nitrogen is highest in
Which of the following species is isoelectronic with CO ?
The process in which oxidation number increases is known as
The ratio of cationic radius to anionic radius in an ionic crystal is greater than 0.732. Its co-ordination number is
Maximum enolisation takes place of:
Adsorption is multiplayer in the case of
Which of the following metals exhibits more than one oxidation states?
Out of the given alternatives Fe is only transition element.
Therefore it shows more than one oxidation state (+ 2 and + 3)
This is due to the fact that there is negligible energy difference
between outemost and penultimate shell
An important ore of copper is