An alkali is titrated against an acid with methyl orange as indicator, which of the following is a correct combination?
Base | Acid | End Point |
Strong | Strong | Pink to colourless |
Base | Acid | End Point |
Weak | Strong | Colourless to pink |
Base | Acid | End Point |
Strong | Strong | Pinkish Red to Yellow |
Base | Acid | End Point |
Weak | Strong | Yellow to Pinkish Red |
Which of the following are Lewis acids?
BCl3 and AlCl3
PH3 and BCl3
AlCl3 and SiCl4
PH3 and SiCl4
Dissolving NaCN in de-ionised water will result in a solution having
pH < 7
pH = 7
pOH = 7
pH > 7
PbCl2 is insoluble in cold water. Addition of HCl increases its solubility due to
formation of soluble complex anions like [PbCl3]-
oxidation of Pb(II) to PB(IV)
formation of [Pb(H2O)6]2+
formation of polymeric lead complexes
Of the following compounds, which one is the strongest Bronsted acid in a aqueous solution?
HClO3
HClO2
HOCl
HOBr
The yield of acetanilide in the reaction (100% conversion) of 2 moles of aniline with 1 mole of acetic anhydride is
270 gm
135 gm
67.5 gm
177 gm
Equilibrium constants for the following reactions at 1200 K are given
2H2O (g) 2H2 (g) + O2 (g) [K1 = 6.8 × 10-8]
2CO2 (g) 2CO (g) + O2 (g) [K2 = 1.6 × 10-6]
The equilibrium constant for the reaction?
H2(g) + CO2(g) CO (g) + H2O (g)
at 1200 K will be
0.05
20
0.2
5.0
Which of the following solutions will turn violet when a drop of lime juice is added to it?
A solution of NaI
A solution mixture of KI and NaIO3
A solution mixture of NaI and KI
A solution mixture of KIO3 and NaIO3
The molar solubility (in mol L-1) of a sparingly soluble salt MX4 is 'S'. The corresponding solubility product is Ksp in terms of 'Ksp' is given by the relation
S=(256 Ksp)1/5
S=(128 Ksp)1/4