CBSE
Multiple Choice QuestionsArgol, a brown crust, formed during the fermentation of grape juice contains
CO2
fused oil
potassium hydrogen tartarate
lye
The pH value of 0.001 M aqueous solution of NaCl is
7
4
11
unpredictable
Which buffer solution comprising of the following has its pH value greater than 7?
CH3COOH + CH3COONa
HCOOH + HCOOK
CH3COONH4
NH4OH + NH4Cl
10-6 M NaOH is diluted 100 times. The pH of the diluted base is
between 7 and 8
between 5 and 6
between 6 and 7
between 10 and 11
Which of the following is a Lewis acid ?
OH-
H+
F-
NH3
Which of the following is correct?
The pH of one litre solution containing 0.49 g of H2SO4 is 2.0
The conjugate base of H2S is S2-
BF3 is a Lewis base
Phenolphthalein is colourless in basic medium
Which of the following is correct ?
Catalyst undergoes permanent chemical change
Particle size of solute in true solution is 10-3 m
Starch solution is a hydrosol
Hydrolysis of liquid ester in the presence of mineral acid is an example of heterogeneous catalysis reactions
What is the equation for the equilibrium constant (Kc) for the following reaction?
A 0.1 aqueous solution of a weak acid is 2% ionised. If the ionic product of water is 1 x 10-4, the [OH-] is
5 x 10-12 M
2 x 10-3 M
1 x 10-14 M
None of these
Disperse phase and dispersion medium in butter are respectively
solid and liquid
liquid and solid
liquid and liquid
solid and solid
