Heating ammonia gas with tetraoxosulphate (VI) acid
Heating ammonium trioxonitrate (V) with tetraoxosulphate (VI) acid
Heating sodium trioxonitrate (V) with tetraoxosulphate (VI) acid
Heating potassium trioxonitrate (V) with calcium hydroxide
Heating a mixture of ammonia gas and oxygen.
Correct answer is C
No explanation has been provided for this answer.
+ 28.65 kJ
- 28.65KJ
+ 57.3KJ
- 114.6 KJ
- 229.2 KJ
Correct answer is D
NaOH + HCl = NaCl + H2O \(\Delta\)H = -57.3kJ
Heat of reaction of 2NaOH + H2O4
NaSO4 + H2O is
= 57.3 x 2 = -114.6 kJ
For the reaction 2Fe3+ 2I- \(\to\) 2Fe2+ + I2, which of the following statements is TRUE?
Fe is oxidized to Fe3+
Fe3+ is oxidized to Fe2+
I- is oxidized to I2
I- is reduced to I2
I- is displacing an electron from Fe3+
Correct answer is C
No explanation has been provided for this answer.
In which of the following reactions does hydrogen peroxide act as a reducing agent?
H2S + H2O2 \(\to\) S + 2H2O
PbSO3 + H2O2 \(\to\) PbSO4 + H2O
2I+ 2H+ + H2O2 \(\to\) I2 + 2H2O
PbO2 + 2HNO3 + H2O2 \(\to\) Pb(NO3)2 + 2H2O + O2
SO2 + H2O2 \(\to\) H2SO4
Correct answer is D
No explanation has been provided for this answer.
Which of the following mixtures would result in a solution of pH greater than 7?
25.00 cm3 of 0.05 M H2SO4 and 25.00cm3 of 0.50 M Na2CO3
25.00 cm3 of 0.05 M H2SO4 and 25.00 cm3 of 0.10 M NaHCO3
25.00 cm3 of 0.11 MH2SO4 and 25.00cm3 0. 10 M NaOH
25.00cm3 of 0.11 MH2 SO4 and 50.00 cm3 of 0.05 M NaOH
25.00cm3 of 0.25 M H2SO4 and 50.00cm3 of 0.20 M NaOH
Correct answer is A
No explanation has been provided for this answer.