In the following reaction X and Y are respectively,
The reaction of 4-bromobenzyl chloride with NaCN in ethnol leads to
Which of the following is not isoelectronic?
In its reaction with silver nitrate acetylene shows
An aqueous solution of colourless metal sulphate M, gives white ppt. with NH₄OH. This was soluble in excess of NH₄OH. On passing H₂S through this solution a white ppt. is formed. The metal M in the salt is
If the radius of first Bohr orbit be a₀, then the radius of the third orbit of hydrogen would be
The spectrum of He is expected to be similar to that of
Which of the following does not have sp2-hybridised carbon?
The bond order of individual C - C bond in benzene is
According to the Fajan's rule, covalent bond is favoured by
The favourable conditions for a spontaneous reaction are
Consider the reaction N2(g) + 3H2(g) → 2NH3(g). The equality relationship between (d[NH3]/dt) and -(d[H2]/dt) is
The minimum energy required by molecules to react is called
When 10gram of methane is completely burnt in oxygen, the heat evolved is 560kJ. What is the heat of combustion (in kJ/mole) of methane?
If a dye absorbs green colour in the visible region, then it will appear
Which of the following compounds will exhibits geometrical isomerism ?
Which of the following ions are paramagnetic in character?
Ni2+ is paramagnetic in nature as it has unpaired electrons.
At STP,1.12 litre of H₂ is obtained on flowing a current for 965 seconds in a solution.The value of current is
Refractory metals are used in construction of furnaces because
Among the following complexes, which has a magnetic moment of 5.9 BM?
Which of the following mixture of gases does not obey Dalton's law of partial pressure ?
Potassium is kept in
Which one of the following indicates the value of the gas constant R ?
The number of sigma and pi ( π ) bonds present in 'inorganic benzene' respectively are
Which of the following melts in boiling water?
Oxalic acid reacts with conc. H2SO4 to give a mixture of two gases. When this mixture is passed through caustic potash. One of the gases is absorbed. What is the product formed by the absorbed gas with caustic potash
Two oxides of nitrogen, NO and NO2 react together at 253K an form a compound of nitrogen X. X reacts with water to yield another compound of nitrogen Y. The shape of the anion of Y molecule is
When a lead storage battery is discharged
Which one of the following oxides of chlorine is obtained by passing dry chlorine over silver chlorate at 90oC?
Which of the following processes is used in the extractive metallurgy of magnesium?
Which one of the following reaction does not form a gaseous product?
The conjugate base of H₂PO₄⁻ is
A compound having the formula NH2CH2COOH may behave
The hydrolysis of a salt of strong acid and weak base is called
Hydrogenation of the adjoining compound, in the presence of poisonous palladium, catalyst gives
Two moles of acetic acid are heated with P2O5. The product formed is
Atoms with the same mass number but having different nuclear charges are called
The arrangement used to carry out the fission reaction in a controlled manner is called
In the presence of AlCl3, benzene and n - propyl bromide react in Friedel-Craft's reaction to form
Which of the following react with NaOH to produce an acid and an alcohol?
Among acetic acid,phenol and n-hexanol,which will react NaHCO3 to give sodium salt and carbondioxide ?
CH3 COOH + NaHCO3 → CH3COONa + H2O + CO2↑
Acetal is produced by reacting an alcohol in the presence of dry HCl with
Most stable alkene is :
In the following, electrophile is:
HO ― NO2
Which of the following forms with an excess of CN⁻(cyanide ions) a complex having co-ordination number two
Phenol is more readily soluble in
The compound is used in the manufacture of terylene is
The most satisfactory method to separate sugars is to use
Which of the following involves a redox reaction ?
The strongest reducing agent is
In a rock salt structure each Cl⁻ ion is surrounded by
The vapour pressure of a solvent decreased by 10 mm of Hg when a non volatile solute was added to the solvent. The mole fraction of solute in solution is 0.2, what would be the mole fraction of solvent if decrease in vapour pressure is 20 mm of Hg?
9.8 g of H2SO4 is present in 2 litres of a solution. The molarity of the solution is
Which of the following compounds exhibit cis and trans forms?
Which of the following law directly explains the law of conservative of mass?
Which of the following is most effective in causing the coagulation of ferric hydroxide sol?
Which composition amongst the following represents the alloy "german silver" ?
Which metal is present in brass, bronze and German silver?