Q. No.Calculate the molarity of a 40% (w/w) NaOH solution:
(Given: Density of the solution = \(1.2 ~gml^{-1}\))
1. 10 M
2. 12 M
3. 5 M
4. 6 M
| 1. | 240 | 2. | 225 |
| 3. | 204 | 4. | 198 |
1. 26000
2. 30000
3. 25000
4. 28000
1. 100 has four significant figures
2. \(1.00\times 10^2\) has four significant figures
3. 2.005 has four significant figures
4. 0.0025 has four significant figures
| 1. | \(\dfrac{7}{2}\) | 2. | \(\dfrac{9}{2}\) |
| 3. | \(\dfrac{15}{2}\) | 4. | \(6\) |
A monoatomic gas has a vapour density of 8. If 5 grams of this gas is taken in a sample, then determine the total number of atoms present in the sample:
[Given : \(Vapour~ density = \dfrac{molar ~mass}{2}\)]
2. \(0.25 ~N_A\)
3. \(0.3125~N_A\)
4. \(N_A\)
Given the chemical combustion of carbon:
C + O2 → CO2(g)If you mix 12 grams of Carbon with 48 grams of Oxygen gas, If the volume of CO2 gas produced at STP is t litres, calculate the final value of 2t:
(Given: Molar volume at STP = 22.4 L/mol)
2. 42
3. 45
4. 54
How much carbon disulphide is needed to yield 64 grams of SO2 in the following reaction?
CS2 + 3O2 → CO2 + 2SO2
1. 38 g
2. 57 g
3. 76 g
4. 114 g
Which of the following concentration factor is affected by a change in temperature?
1. Molarity
2. Molality
3. Mole fraction
4. Weight fraction
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