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Practice Online Test Series for JEE Main 2018 & NEET 2018
Molecule has:
The following stereoisomers are:
Which statement is false?
Number of optically active stereoisomers possible for the following compound is?
The total number of isomers for the compound having molecular formuia `C_2FClBrl` is:
Which one of the following complex ions has geometrical isomers
Which of the following has maximum number of lone pair associated with Xe
Consider the reaction
`4NO_2(g)+O_2(g)->2N_2O_5(g) ,triangle_rH=-111` KJ
if `N_2O_5`(s) is formed instead of `N_2O_5`(g) in the aboe reaction the `triangle_rH` value will be
(Given `triangleH` of sublimaton for `N_2O_5` is 54 kJ mo`l^–`)
The correct order of acid strength of the following compounds is
I. Phenol II. p-cresolIII. m-nitrophenol IV. p-nitrophenol
When r, p and M represent rate of diffution, pressure and molecular mass, respectively, then the ratio of the rates of diffusion `(r_A/r_B)` of two gases A and B, is given as
The non-aromatic compound among the following is
Copper crystallises in fcc lattice with a unit cell edge of 361 pm. The radius of copper atom is
The correct order of electron gain enthalpy with negative sing F, Cl, Br and I, having atomic number 9, 17, 35 and 53 respectively, is
The value of enthalpy change `(triangleH)` for the reaction `C_2H_5OH(l)+3O_2(g)->2CO_2(g)+3H_2(l)` , at 27ºC is –1366.5 kJ mo`l^(–1)`. The value of internal energy change for the above reaction at this temperature will
In view of the signs of `triangle_r` Gº for the following reactions :
`PbO_2+Pb->2PbO ,D_rG^o<0,`
`SnO_2+Sn->2SnO, D_rG^o>0`
Which oxidation states are more characteristics for lead and tin
Among the ligands `NH_3, en, CN^– `and `CO`, the correct order of their increasing field strength, is
The frequency of light emitted for the transition n = 4 to n = 2 of `He^+` is equal to the transition in H atom corresponding to which of the following
The mass of potassium dichromate crsytals required to oxidise 750 c`m^3` of 0.6 M Mohr's salt solution is (Given, molar mass : Potassium dichromate = 294, Mohr's salt = 392)
The `K_(sp)` for `Cr(OH)_3` is `1.6×10^(–30)`. The molar solubility of this compound in water is
The molecular velocity of any gas is
