Which method is NOT used to determine rate of a reaction?
change in amount of precipitate formed
change in equilibrium constant
change in intensity of colour
change in pH values.
change in total gas pressure
Correct answer is B
No explanation has been provided for this answer.
To test for the presence of chloride ions in ion, correct sequence of reagents to use is
Ba(NO3)2(aq) then HNO3(aq).
HCl(aq) then Ba(NO3)2(aq).
HCl(aq) then Ag3(aq).
HNO3(aq) then fresh FeSO4(aq).
HNO3(aq) then AgNO3(aq).
Correct answer is E
No explanation has been provided for this answer.
NaCl(s) does NOT conduct electricity, but N(aq) does. This is because
NaCl(s) is non-ionic but NaCl(aq) is ion
NaCl(aq) contains mobile electrons, where absent in NaCl(s).
NaCl(aq) contains mobile ions which Nacl,) does not contain.
NaCl(s) ionizes partiality while NaCl(aq) iodizes completely.
NaCl(s) decomposes when heated but NCl(aq) is stable to heat.
Correct answer is C
No explanation has been provided for this answer.
The green colour solution of an Fe2 salt changes to a brown solution of an Fe3+ salt by
conversion
elimination
oxidation
reduction
substitution
Correct answer is C
No explanation has been provided for this answer.