A substance is said to be hygroscopic when it
absorbs atmospheric moisture and then goes into solution
absorbs atmospheric moisture but does not go into solution
changes colour
is not affected by atmospheric moisture
losses its water of crystallization
Correct answer is B
No explanation has been provided for this answer.
The electrode potential in volts of 2H+(aq) / H2(q) system is
-2.87
-2.71
0.8
1.68
Correct answer is E
No explanation has been provided for this answer.
Chromatography is used to separate components of mixtures which differ in their rates of
diffusion
migration
reaction
sedimentation
sublimation
Correct answer is B
No explanation has been provided for this answer.
hydrogen ions are in greater concentration than sodium ions.
hydrogen is higher than sodium in the electrochemical series.
hydrogen is lower than sodium in the electrochemical series.
of the nature of the electrodes.
the concentration of sodium ions is greater than that of the hydrogen ion in the electrolyte.
Correct answer is C
No explanation has been provided for this answer.
Which of these is NOT a physical property f water?
Can be used to dissolve organic substances
Has a boiling point of 100 ° C
Has a density of 19cm3 at 40 °C
Has a freezing point of 0 ° C
is neutral to litmus
Correct answer is A
No explanation has been provided for this answer.