A mixture of 2.3 g formic acid and 4.5 g oxalic acid is treated with conc. . The evolved gaseous mixture is passed through KOH pellets.
Weight (in g) of the remaining product at STP will be:
1. 1.4
2. 3.0
3. 2.8
4. 4.4
Which of the following is dependent on temperature?
1. | Molarity | 2. | Mole fraction |
3. | Weight percentage | 4. | Molality |
Suppose the elements X and Y combine to form two compounds XY2 and X3Y2. If 0.1 mole of XY2 weighs 10 g and 0.05 mole of X3Y2 weighs 9 g, the atomic weight of X and Y respectively, will be:
1. | 40, 30 | 2. | 60, 40 |
3. | 20, 30 | 4. | 30, 20 |