Which of the following compounds shall not produce propene by reaction with HBr followed by elimination or direct only elimination reaction ?
Which one of the following structures represent nylon 6,6 polymer ?
In which of the following molecules, all atoms are coplanar ?
Which of the following can be used as the halide component for Freidel –Crafts reaction?
Jahn-Teller effect is not observed in high spin complexes of
Which one of the following statements related to lanthanons is incorrect ?
Ce<sup>+4</sup> is strong oxidising agent and easily convert into Ce<sup>+3</sup> Eu<sup>+2</sup> exist and behave as reducing agent lanthanons are much more reactive than aluminum. Ln(OH)<sub>3</sub> are basic in nature and as ionic radius decrease, basic nature decreases from Ce to Lu.
The correct increasing order of trans-effect of the following species is
Trans effect : The intensity of trans effect depend on increase in rate of substitution of the trans ligand. F <sup>–</sup> < NH<sub>3</sub> < Cl<sup>–</sup> < Br<sup>–</sup> < Ph<sup>–</sup> < CH<sub>3</sub> <sup>–</sup> < CN<sup>–</sup>
Among the following, which one is a wrong statement?
The correct geometry and hybridization for XeF4 are
Which of the following pairs of d-orbitals will have electron density along the axis ?
Hot concentrated sulphuric acid is a moderately strong oxidizing agent. Which of the following reactions does not show oxidizing behaviour ?
In context with beryllium, which one of the following statements is incorrect ?
Which of the following pairs of ions is isoelectronic and isostructural ?
Which of the following fluoro-compounds is most likely to behave as a Lewis base ?
The suspension of slaked lime in water is known as
Suspension of slaked lime is called milk of lime
Zinc can be coated on iron to produce galvanized iron but the reverse is not possible. It is because
AIF3 is soluble in HF only in presence of KF. It is due to the formation of
Boric acid is an acid because its molecule
(1) Combines with proton from water molecule
(2) Contains replaceable H+ ion
(3) Gives up a proton
(4) Accepts Om water releasing proton
The number of electrons delivered at the cathode during electrolysis by a current of 1 ampere in 60 seconds is (charge on electron = 1.60 × 10–19 C)
Suppose the elements X and Y combine to form two compounds XY2 and X3Y2. When 0.1 mole of XY2 and XY2 weights 10 g and 0.05 mole of X3Y2 weights 9 g, the atomic weights of X and Y are
The solubility of AgCl(s) with solubility product 1.6 × 10 –10 is in 0.1 M NaCl solution would be
Which one of the following is incorrect for ideal solution ?
For ideal solution inter molecular forces are identical so,
So 1st option is incorrect.
In calcium fluoride, having the fluorite structure, the coordination numbers for calcium ion (Ca2+) and fluoride ion (F– ) are
The percentage of pyridine (C5H5N) that forms pyridinium ion (C5H5N +H) in a 0.10 M aqueous pyridine solution (Kb for C5H5N = 1.7 × 10–9) is
The van't Hoff factor (i) for a dilute aqueous solution of the strong electrolyte barium hydroxide is
For a sample of perfect gas when its pressure is changed isothermally from pi to pf , the entropy change is given by
How many electrons can fit in the orbital for which n = 3 and £ = 1 ?
n = 3 £ = 1 3p orbital can have only 2 elelctron.