The major product formed in the following reaction is :

Which of the following will most readily give the dehydrohalogenation product ?

The trans-alkenes are formed by the reduction of alkynes with

In Wilkinson's catalyst, the hybridization of central metal ion and its shape are respectively :

Which of the following complexes will shows geometrical isomerism ?

The correct order of spin-only magnetic moments among the following is : (Atomic number : Mn = 25, Co = 27, Ni = 28, Zn = 30)

The correct combination is :

Consider the following reaction and statements: [Co(NH3)4Br2]+ + Br- $$\to$$ [Co(NH3)3Br3] + NH3 (I) Two isomers are produced if the reactant complex ion is a cis-isomer (II) Two isomers are produced if the reactant complex ion is a trans-isomer (III) Only one isomer is produced if the reactant complex ion is a trans-isomer (IV) Only one isomer is produced if the reactant complex ion is a cis – isomer The correct statements are

The oxidation states of Cr in [Cr(H2O)6]Cl3, [Cr(C6H6)2] and K2[Cr(CN)2(O)2(O2)(NH3)] respectively are :

The total number of possible isomers for square-planar [Pt(Cl)(NO2)(NO3)(SCN)]2- is :

An aqueous solution contains 0.10 M H2S and 0.20 M HCl. If the equilibrium constants for the formation of HS– from H2S is 1.0 $$\times$$ 10–7 and that of S2- from HS– ions is 1.2 $$\times$$ 10–13 then the concentration of S2- ions in aqueous solution is :

Following four solutions are prepared by mixing different volumes of NaOH and HCl of different concentrations, pH of which one of them will be equal to 1 ?

Which of the following is a Lewis acid?

The minimum volume of water required to dissolve 0.1 g lead (II) chloride to get a saturated solution (Ksp of PbCl2 = 3.2 $$\times$$ 10-8 atomic mass of Pb = 207 u ) is :

An alkali is titrated against an acid with methyl orange as indicator, which of the following is a correct combination?

Which of the following salts is the most basic in aqueous solution?

Which of the following are Lewis acids?

An aqueous solution contains an unknown concentration of Ba2+. When 50 mL of a 1 M solution of Na2SO4 is added, BaSO4 just begins to precipitate. The final volume is 500 mL. The solubility product of BaSO4 is 1 $$\times$$ 10–10. What is the original concentration of Ba2+?

Ejection of the photoelectron from metal in the photoelectric experiment can be stopped by applying 0.5 V when the radiation of 250 nm is used. The work function of the metal is :

The de-Broglie's wavelength of electron present in first Bohr orbit of 'H' atom is :