Q. No.[Molecular weight of Glycine = 75]
1. 26000
2. 30000
3. 25000
4. 28000
5 moles of AB2 weight kg and 10 moles A2B2 weight kg. The molar mass of A (MA) and molar mass of B (MB) in kg mol are:
| 1. | MA = 10×10-3 and MB = 5×10-3 |
| 2. | MA = 25×10-3 and MB = 50×10-3 |
| 3. | MA = 5×10-3 and MB = 10×10-3 |
| 4. | MA= 50×10-3 and MB = 25×10-3 |
The molecular formula of a commercial resin used for exchanging ions in water softening is . The maximum uptake of ions by the resin when expressed in mole per gram resin is:
\( \mathrm{C}_8 \mathrm{H}_7 \mathrm{SO}_3 \mathrm{Na}+\mathrm{Ca}^{2+} \rightarrow (\mathrm{C}_8 \mathrm{H}_7 \mathrm{SO}_{3}){_2} \mathrm{Ca}+ \mathrm{Na}^{+}\)
1.
2.
3.
4.
What is the ratio of the number of molecules of oxygen to nitrogen in a specific gaseous mixture if their mass ratio is 1:4?
| 1. | 7:32 | 2. | 1:8 |
| 3. | 3:16 | 4. | 1:4 |
How many moles of magnesium phosphate, Mg₃(PO₄)₂, contain 0.25 moles of oxygen atoms?
| 1. | 0.02 | 2. | 3.125 × 10–2 |
| 3. | 1.25 × 10–2 | 4. | 2.5 × 10–2 |
Given 645 g of a compound \(C_6H_5N_3O_6\) . The number of N atoms present in this compound is:
Report x if your answer is \(x \times 10^{21} \)
\((C=12, H=1, N=14, O=16)\left(N_{A}=6.02 \times 10^{23}\right) \)
1. 5418
2. 5671
3. 5212
4. 5781
c
| 1. | 2 : 1 | 2. | 6 : 4 |
| 3. | 1 : 2 | 4. | 4 : 6 |
The number of atoms in 560 g of Fe (atomic mass 56 g mol–1) is:
| 1. | Twice that of 70 g N |
| 2. | Half that of 20 g H |
| 3. | Both 1 and 2 |
| 4. | None of the above |
1. 8
2. 10
3. 12
4. 14
The value of m is:
1. 50
2. 67
3. 90
4. 78
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