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The hybridization of atomic orbital of nitrogen in , and respectively are
The reaction is 2NO + 2NOCl.If the concentration of both the reactants is doubled, the rate becomes eight times. What will be the total order?
For , equilibrium pressure of mixture is
The degree of hydrolysis of is
The ratio of closed packed atoms to tetrahedral holes in cubic close packing is
1 : 1
1 : 2
1 : 3
2 : 1
Arrange the following compounds in order of increasing dipole moment(i) Toluene(ii) m dichlorobenzene(iii) o dichlorobenzene(iv) p dichlorobenzene
(I) < (IV) < (II) < (III)
(IV) < (I) < (II) < (III)
(IV) < (I) < (III) < (II)
(IV) < (II) < (I) < (III)
Examine the following two structures for the anilinium ion and choose the correct statement
(II) is not an acceptable canonical structure because carbonium ions are less stable than ammonium ions.
(II) is not an acceptable canonical structure because it is non aromatic.
(II) is not an acceptable canonical structure because nitrogen has 10 valence electrons.
(II) is an acceptable canonical structure.
Anti Markownikoff’s addition of HBr is not observed in
2 – butene
2 – pentene
The reaction of propene with HOCl proceeds via the addition of
5.6 g of a metal forms 12.7 g of metal chloride. Hence, equivalent weight of metal is
The number of orbital in a subshell is equal to
2l + 1
A flask containing 12 g of a gas of relative molecular mass 120 at a pressure of 100 atm, was evacuated by means of a pump until the pressure was 0.01 atm at the same T. Which of the following is the best estimate of the number of molecules left in the flask
The solubility of is x mol . Its would be
How many tetrahedral holes are occupied in diamond?
Number of structural isomers represented by molecular formula is
Which of the following is not cleaved by HI even at 525 K?
Uncertainty in position and momentum are equal. Uncertainty in velocity is
If the speed of the electron in the first Bohr’s orbit of hydrogen atom be ‘x’ then the speed of electron in the third Bohr’s orbit is
Structure of is
The reaction A(g) + 2B(g) C(g) + D(g) is an elementary process. In an experiment, the initial partial pressure of A and B are = 0.60 and = 0.80 atm. = 0.2 atm the
rate of reaction relative to the initial rate is
For the reaction, for forward reaction is +20 kcal and has activation energy 40 kcal. The activation energy
and for backward reaction are respectively:
20, – 20
- 20, 40
A weak base (BOH) with is titrated with a strong acid HCl. At 3/4th is titrated with a strong acid HCl. At
5 + log
5 – log 3
14 – 5 + log 3
For the reaction,bond energies are given as
What will be the value of for the above reaction?
The difference between heats of reaction at constant pressure and constant volume for the at in kJ is
When phenol is reacted with CHCl3 and NaOH followed by acidification, salicylaldehyde is obtained. Which of the following species is involved in the above mentioned reaction as
In the complete combustion of the number of moles of oxygen required is
Compound ‘A’ (molecular formula ) is treated with acidified potassium dichromate to form a product ‘B’ (molecular formula ). ‘B’ forms shining silver mirror on warming with ammonical silver nitrate. ‘B’ when treated with an aqueous solution of . HCl and sodium acetate gives a product ‘C’. Identify the structure of ‘C’:
For preparing M/10 solution of in one litre we need
Which of the following species is not linear?
At low pressure vander Waal’s equation for 3 moles of a real gas will have its simplified form
Zn oxidises Fe.
Zn will reduce
Mg oxidises Fe.
A white salt is insoluble in cold water but soluble in boiling water. Its solution when treated with potassium chromate solution gives yellow precipitate. The salt may be
Most stable carbonium ion is
2 Phenyl ethanol may be prepared by the reaction of phenyl magnesium bromide with
The ether when treated with HI produces
Which of the following is the weakest acid?
The hydrolysis of ethyl acetate is a reaction of
What is the value of decay constant of a compound having half life time, = 2.95 day?
The value of for is 0.15 V. The potential of the half life cell with reaction, is
- 0.3 V
- 0.15 V
An organic compound of molecular formula did not give a silver mirror with Tollen’s reagent, but gave an oxime with hydroxylamine. It may be
The density of certain gas A is 1.5 times that of B and molecular mass of A is M. The molecular mass of B would be
A gaseous mixture contains oxygen and nitrogen in the ratio of 1 : 4 by mass. The ratio of their respective number of molecules is
2 : 4
1 : 8
5 : 16
7 : 32
free radical substitution.
For a reaction, 2HI, at 721 K, the values of equilibrium constant is 50. If 0.5 moles each of are added to system, the value of equilibrium constant at constant temperature will be
The half life period for a zero order reaction is
At the ratio of root mean square velocity of ozone to oxygen is
- 163.23 kJ
IUPAC name of the compound
3,3 – dimethyl – 5 – ethyl heptane
3 – ethyl – 5,5 – dimethyl heptane
4 – ethyl – 3,3 – dimethyl heptane
none of these
Which of the following compounds in liquid state does not have hydrogen bonding?
6.0 g urea is dissolved in 90 g of water. The relative lowering of vapour pressure is
When electricity passed through a solution of , 13.5 g of Al are deposited. The number of faradays must be?
Which of the following is elimination reaction?
All of these
The pH value of NaOH solution is
The complex when dissolve in water give
The volume strength of solution is
The standard reduction potentials for the half reactions are ; ; The emf of the cell having cell reaction is
The most volatile is
The compound that does not contain peroxide is
The rate constants of forward and backward reactions are and respectively. The equilibrium constants is
The pH of 0.1 M is
The oxidation number of sulphur in is
Dry bleach is done by
The number of bonds in molecules is
Given ; ; ; The heat of combustion of will be
The numerical values of for the equilibrium, are related as
Identify ‘C’ in the series
The solubility product of is 2.7 x . The solubility of will be
1.07 x g/litre
5.5 x g/litre
The slope of the plot of versus t for a zero order reaction is
Which of the following is diamagnetic?
The half – life period of a radioactive material is 15 minutes. What percent of radioactivity of that material will remain after 45 minutes?
A certain buffer contains equal concentration of and HX. He for is . The pH of the buffer solution is
The freezing point of 1% solution of lead nitrate in water will be
In methane the bond angle is
Which of the following has highest pH?
A diatomic molecule has a dipole moment of 1.2 D. If the bond distance is 1 . What percentage of electronic charge exists on each atom?
12% of e
19% of e
25% of e
29% of e
2.76 gm of silver carbonate on being heated strongly yields a residue weighing
What will be the percentage of ‘free volume’ available in 1 mole of at 760 mm and 373 K ? Density of (l) at 373 K is 0.958 g/lit.
When the temperature is increased, surface tension of water
shows irregular behaviour.
The root mean square velocity of 1 mole of a monoatomic gas having molar mass M is The relation between average kinetic energy (E) of the gas and is
Which of the following statement (s) is (are) correct?1. The co-ordination number of each type of ion in CsCl crystal is 8.
2. A metal that crystallizes in bcc structure has a co-ordination number of 12.3. A unit cell of an ionic crystal shares some of its ion with other unit cells.4. The length of unit cell in NaCl is 552 pm 181pm
1, 3, 4
Which is incorrect statement?
The only d-orbital which does not have four lobes is d .
Azide ion contains 21 protons and 22 electrons.
The shape of the orbital with l = 1 and m = 0 is dumb-bell like.
A salt ionises as: . It was found that a given solution of the salt had the same freezing point as solution of glucose of twice the molality. The apparent degree
of ionization of the salt is
A solution of urea (M.W. = 56 gm/mole) boils at 100. at the atmospheric pressure. If for water are 1.86 and 0.512 K.kg/mol respectively, the above solution will freeze at
The heat of neutralization of HCl by NaOH is -55.9 kJ/mole while that of HCN by NaOH is -12.1 kJ/mole, the energy of dissociation of HCN is:
Calculate 298 for the reaction Given that the standard enthalpies of formation of are -278.5 kJ, -228.9 kJ & -285.8 kJ. respectively call at 298K)
Phosphorus pentachloride dissociates as follows in a closed reaction vessel, If total pressure at equilibrium of the reaction mixture is P & degree of dissociation of is x, the partial pressure of will be
Which one of the following statements is not true?
The conjugate base of
pH + pOH = 14 for all aqueous solution
The pH of 1 x M HCl is 8
96,500 coulombs of electricity when passed through a solution deposits 1 gm
equivalent of copper at cathode
Which of the following plot represents the graph of pH against volume of alkali added in the titration of NaOH & HCl?
For the cell (0.001 M) | (0.1 M) | Cu, at 298 K is 0.83 V. This can be increased by(1) Increasing (2) Increasing (3) Decreasing (4) Decreasing
1, 2, 3
What will be the equilibrium constant for the reaction The standard reduction potentials in acidic conditions are 0.77 & 0.54 V respectively for couples.
For a certain reaction ; nA Products, where A is symbol for reactant & ‘n’ is the of moles of A, a plot of vs t gives a straight line as shown
For a reaction : aA + bB products; is equal to
Which of the following is used to separate in presence of ?
Excess of KCN
Two isomeric alkenes A & B have molecular formula . On adding , A gives
optically inactive compound while B gives chiral compound. The two isomers are :
A is 3-Chloropent-1-ene & B is 1-chloropent-2-ene
A is 2-chloro-3-methyl but-2-ene while B is 1-chloro-3-methyl but-1-ene
A is 3-chloropent-2-ene & B is 2-chloropent-2-ene
A is 4-chloropent-2-ene & B is 4-chloropent-1-ene
Reaction of trans -2-phenyl-1-bromocyclopentane on reaction with alcoholic KOH produces
4-Phenyl cyclo pentene
2-phenyl cyclo pentene
1-phenyl cyclo pentene
3-phenyl cyclo pentene
The structure of the major product formed in the following reaction is
The end product in the reaction :
To distinguish between salicylic acid & phenol one can use:
5% NaOH solution
The most reactive compound towards formation of cyanohydrin on treatment with is
Aldehydes and ketones will not form crystalline derivatives with :
Dihydrogen sodium phosphate
What are the organic products formed in the following reaction?
The correct order of acid strength is :
Identify (X) in the sequence,
- CH2 – –
In the diazotization of aniline with sodium nitrite and hydrochloric acid, the excess of hydrochloric acid is used primarilyto :
Supress the concentration of free aniline
Supress the hydrolysis to phenol
Ensure a stoichiometric amount of nitrous acid and HCl
Neutralise the base liberated
Acetamide is amphoteric in character
In the electron pair on N-atom is delocalized by resonance
In there is no resonance, while in acetamide the lone pair of electrons on N-atom is delocalized and therefore less available for protonation
None of the above.
A primary amine heated with in presence of excess of gives isothiocyanate. The reaction is called :
Hofmann’ bromamide reaction
Hofmann’ mustard oil reaction
When aniline reacts with oil of bitter almonds condensation takes place and beenzal derivatives are formed. These are known as :
Iodide of Millon’s base
Which of the following is a disaccharide?
Glucose gives the silver mirror test with ammoniacal solution of silver nitrate because it contains :
Cellophane is made from :
Which among the following gives nitrogen on heating?
Ammonia is generally manufactured for fertilizers by the reactions :
By passing an electric discharge in a mixture of
By reducing the byproduct nitric acid
By passing a mixture of under high pressure and moderate temperature over a
Which acid has P – P linkage?
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