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Q. No.Moles of \(\text{CH}_4\) required for the formation of 22 gm of \(\text{CO}_2\) is \(\text{m}\times10^{-2}.\)
The value of m is:
1. 50
2. 67
3. 90
4. 78
Subtopic: Moles, Atoms & Electrons |
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Methane reacts with oxygen according to the following chemical equation:
CH₄ + 2O₂ → CO₂ + 2H₂O
Calculate the mass of methane required to produce 22 g of carbon dioxide:
1. Eight (8)
2. One (1)
3. Nine (9)
4. Seven (7)
Subtopic: Equation Based Problem |
90%
Level 1: 80%+
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If C is added to a solution of A and B, then find the mole fraction of C:
| 1. | \(\dfrac{n_C}{n_A+n_B+n_C}\) | 2. | \(\dfrac{n_C}{n_A \cdot n_B+n_C}\) |
| 3. | \(\dfrac{n_C}{n_A \cdot n_C+n_B}\) | 4. | \(\dfrac{n_C}{n_A+n_B}\) |
Subtopic: Concentration Based Problem |
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Find the number of moles of PbSO₄ precipitate formed when 72 moles of PbCl₂ reacts completely with
50 moles of (NH₄)₂SO₄.
1. 69
2. 50
3. 90
4. 89
50 moles of (NH₄)₂SO₄.
1. 69
2. 50
3. 90
4. 89
Subtopic: Concentration Based Problem |
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A 500 mL solution of \(\mathrm{CuSO}_4\) having density and molarity, \(1.25 \mathrm{~g} \mathrm{~mL}^{-1}\) and \(2 \times 10^{-1} \mathrm{M}\) respectively at \(32^{\circ} \mathrm{C} \text {. }\)
Find the value of \(x\) if the molality is expressed as \(x \times 10^{-2}\) molal? [Nearest Integer]
1. 16
2. 19
3. 25
4. 50
Find the value of \(x\) if the molality is expressed as \(x \times 10^{-2}\) molal? [Nearest Integer]
1. 16
2. 19
3. 25
4. 50
Subtopic: Concentration Based Problem |
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Level 2: 60%+
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The number of atoms in a silver plate having an area of 0.05 cm² and a thickness of 0.05 cm is given as X x 1019.
Find the value of X (nearest integer).
(Density of silver = 7.9 g cm⁻³)
1. 88
2. 90
3. 11
4. 14
Subtopic: Concentration Based Problem |
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If a 250 mL solution of \(\text{CH}_3\text{COONa}\) having molarity 0.35 M is prepared, then calculate the mass of \(\text{CH}_3\text{COONa}\) required in grams?
1. Nine (9)
2. Seven (7)
3. Eight (8)
4. Ten (10)
1. Nine (9)
2. Seven (7)
3. Eight (8)
4. Ten (10)
Subtopic: Concentration Based Problem |
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50 ml of 0.5 M oxalic acid is completely Neutralised by 25 ml of NaOH solution. Calculate the amount of NaOH (in gm) present in 25 ml of given NaOH solution.
1. 5
2. 2
3. 6
4. 9
1. 5
2. 2
3. 6
4. 9
Subtopic: Concentration Based Problem |
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Find out molality of \(0.8~\text{M H}_2\text{SO}_4\) solution having density of solution equal to 1.02 g/ml (Nearest integer)
1. 0
2. 1
3. 6
4. 8
1. 0
2. 1
3. 6
4. 8
Subtopic: Concentration Based Problem |
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The quantity that changes with temperature:
1. Mole fraction
2. Mass percentage
3. Molarity
4. Molality
1. Mole fraction
2. Mass percentage
3. Molarity
4. Molality
Subtopic: Concentration Based Problem |
92%
Level 1: 80%+
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