- Messages
- 9
- Reaction score
- 3
- Points
- 13
It was redoxWasnt it supposed 2 be redox??
Thts wht m frnd wrote... i ended up wth oxidation!
We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
Click here to Donate Now (View Announcement)
It was redoxWasnt it supposed 2 be redox??
Thts wht m frnd wrote... i ended up wth oxidation!
Wasnt it supposed 2 be redox??
Thts wht m frnd wrote... i ended up wth oxidation!
MashaAllah...goood memory...My Q2 was like this:
FA5 (i) Effervescence noted, brown gas released which is identified as NO2 due to color
(ii) Effervescence, Solution turns brown, black-brown ppt formed which dissolves and brown gas NO2 given off, identified due to color
(iii) Purple color of KMNo4 decolorised, effervescence, brown gas given off, identified as NO2 due to color.
FA6 (i) Missed because of time.
(ii) Dissolves to form colorless solution in H2O. Heating with NaOH(aq) causes colorless gas to be evolved, turns red litmus blue. Identified as NH3
FA7 (i) Melts into colorless liquid. Upon standing, first becomes colorless suspension then white solid obtained when water evaporates.
(ii) Dissolves to form colorless solution in H2o. Upon heating with NaOH(aq), colorless gas evolved, turns blue litmus red.
Element: Nitrogen
OS: +3, +1
Type: Oxidation
b)
Reagents: NaOH(aq), NH3(aq)
FB8 (i) Add 1cm depth NaOH (aq) to 1cm depth FB8, then add excess NaOH(aq) Greenish ppt formed insoluble in excess (forgot exact color)
(ii) Add 1cm depth NH3 (aq) to 1 cm depth FB8, then add excess NH3(aq) Blue solution formed
FB9 (i) Add 1cm depth NaOH(aq) to 1cm depth FB9, then add excess NaOH(aq) Pale green ppt formed, insol. in excess
(ii) Add 1cm depth NH3(aq) to 1 cm depth FB9, then add excess NH3(aq) Pale green ppt formed, insol. in excess
(The table above was really cramped for FB9, so I wrote legibly but very small.)
FB9
Explanation: Observations made match notes on chart.
Missed the last two parts of the question. How many marks out of 14-16 (the no. of marks it was worth) should I expect in this question?
My Q2 was like this:
FA5 (i) Effervescence noted, brown gas released which is identified as NO2 due to color
(ii) Effervescence, Solution turns brown, black-brown ppt formed which dissolves and brown gas NO2 given off, identified due to color
(iii) Purple color of KMNo4 decolorised, effervescence, brown gas given off, identified as NO2 due to color.
FA6 (i) Missed because of time.
(ii) Dissolves to form colorless solution in H2O. Heating with NaOH(aq) causes colorless gas to be evolved, turns red litmus blue. Identified as NH3
FA7 (i) Melts into colorless liquid. Upon standing, first becomes colorless suspension then white solid obtained when water evaporates.
(ii) Dissolves to form colorless solution in H2o. Upon heating with NaOH(aq), colorless gas evolved, turns blue litmus red.
Element: Nitrogen
OS: +3, +1
Type: Oxidation
b)
Reagents: NaOH(aq), NH3(aq)
FB8 (i) Add 1cm depth NaOH (aq) to 1cm depth FB8, then add excess NaOH(aq) Greenish ppt formed insoluble in excess (forgot exact color)
(ii) Add 1cm depth NH3 (aq) to 1 cm depth FB8, then add excess NH3(aq) Blue solution formed
FB9 (i) Add 1cm depth NaOH(aq) to 1cm depth FB9, then add excess NaOH(aq) Pale green ppt formed, insol. in excess
(ii) Add 1cm depth NH3(aq) to 1 cm depth FB9, then add excess NH3(aq) Pale green ppt formed, insol. in excess
(The table above was really cramped for FB9, so I wrote legibly but very small.)
FB9
Explanation: Observations made match notes on chart.
Missed the last two parts of the question. How many marks out of 14-16 (the no. of marks it was worth) should I expect in this question?
increadable memory !!! what do u eat lol ??My Q2 was like this:
FA5 (i) Effervescence noted, brown gas released which is identified as NO2 due to color
(ii) Effervescence, Solution turns brown, black-brown ppt formed which dissolves and brown gas NO2 given off, identified due to color
(iii) Purple color of KMNo4 decolorised, effervescence, brown gas given off, identified as NO2 due to color.
FA6 (i) Missed because of time.
(ii) Dissolves to form colorless solution in H2O. Heating with NaOH(aq) causes colorless gas to be evolved, turns red litmus blue. Identified as NH3
FA7 (i) Melts into colorless liquid. Upon standing, first becomes colorless suspension then white solid obtained when water evaporates.
(ii) Dissolves to form colorless solution in H2o. Upon heating with NaOH(aq), colorless gas evolved, turns blue litmus red.
Element: Nitrogen
OS: +3, +1
Type: Oxidation
b)
Reagents: NaOH(aq), NH3(aq)
FB8 (i) Add 1cm depth NaOH (aq) to 1cm depth FB8, then add excess NaOH(aq) Greenish ppt formed insoluble in excess (forgot exact color)
(ii) Add 1cm depth NH3 (aq) to 1 cm depth FB8, then add excess NH3(aq) Blue solution formed
FB9 (i) Add 1cm depth NaOH(aq) to 1cm depth FB9, then add excess NaOH(aq) Pale green ppt formed, insol. in excess
(ii) Add 1cm depth NH3(aq) to 1 cm depth FB9, then add excess NH3(aq) Pale green ppt formed, insol. in excess
(The table above was really cramped for FB9, so I wrote legibly but very small.)
FB9
Explanation: Observations made match notes on chart.
Missed the last two parts of the question. How many marks out of 14-16 (the no. of marks it was worth) should I expect in this question?
For almost 10 years, the site XtremePapers has been trying very hard to serve its users.
However, we are now struggling to cover its operational costs due to unforeseen circumstances. If we helped you in any way, kindly contribute and be the part of this effort. No act of kindness, no matter how small, is ever wasted.
Click here to Donate Now