Q. No.In the reaction CrO5 + H2SO4 → Cr2(SO4)3 + H2O + O2 one mole of CrO5 will liberate how many moles of O2
1. 5/2
2. 5/4
3. 9/2
4. none of these
To unlock all the explanations of 20 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 20 chapters you need to be enrolled in MasterClass Course.
0.4g of a polybasic acid HnA (all the hydrogens are acidic) requires 0.5g of NaOH for complete neutralization. The number of replaceable hydrogen atoms in the acid and the molecular weight of 'A' would be : (Molecular weight of the acid is 96 gms.)
1. 1, 95
2. 2, 94
3. 3, 93
4. 4, 92
Number of moles of MnO-4 required to oxidise one mole of ferrous oxalate completely in acidic medium will be
1. 0.6 mole
2. 0.4 mole
3. 7.5 moles
4. 0.2 mole
To unlock all the explanations of 20 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 20 chapters you need to be enrolled in MasterClass Course.
One mole of N2H4 loses 10 mole of electrons to form a new compound Y. Assuming that all nitrogen appear in the new compound, what is the oxidation state of N2 in Y ? (There is no change in the oxidation state of hydrogen)
1. + 3
2. – 3
3. – 1
4. + 5
To unlock all the explanations of 20 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 20 chapters you need to be enrolled in MasterClass Course.
Consider the change in the oxidation state of Bromine corresponding to different emf values as shown in the diagram below:
\(\small{BrO_4^-\ \overset{1.82V}{\longrightarrow}\ BrO_3^-\ \overset{1.5V}{\longrightarrow} HBrO\ \overset{1.595V}{\longrightarrow}\ Br_2 \overset{1.0652V}{\longrightarrow}\ Br^-}\)
Then the species undergoing disproportionation is:-
1.
2.
3.
4. HBrO
To unlock all the explanations of 20 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 20 chapters you need to be enrolled in MasterClass Course.
Iron does not get oxidised in:
| 1. | Rusting of iron sheets |
| 2. | Decolourisation of blue CuSO4 solution by iron |
| 3. | Formation of Fe(CO)5 from Fe |
| 4. | Liberation of H2 from steam by iron at a high temperature |
To unlock all the explanations of 20 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 20 chapters you need to be enrolled in MasterClass Course.
1. Y > X > Z
2. Z > X > Y
3. X > Y > Z
4. Y > Z > X
The respective oxidation states of P in H4P2O5, H4P2O6, and H4P2O7 are:
| 1. | +3, +5, and +4 | 2. | +5, +3, and +4 |
| 3. | +5, +4, and +3 | 4. | +3, +4, and +5 |
To unlock all the explanations of 20 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 20 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 20 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 20 chapters you need to be enrolled in MasterClass Course.
The number of moles of KMnO4 that will be needed to react with one mole of sulphite ion in acidic solution is :
1.
2.
3.
4.
To unlock all the explanations of 20 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 20 chapters you need to be enrolled in MasterClass Course.
© 2024 GoodEd Technologies Pvt. Ltd.