Nitric acid can be produced in three steps process
(I)
(II)
(III)
percent yield Ist, IInd and IIIrd are respectively 50%, 60% and 80% respectively then what volume of at 1 atm and 0C required to produces 1575 g of
1. 156.25
2. 350 L
3. 3500 L
4. None of these
Density of dry air containing only and is 1.15 g/L at 740 mm and 300 K. What is % composition of by weight in the air?
1. 78%
2. 75.5%
3. 70.02%
4. 72.75%
In preparation of iron from haematite by the reaction with carbon
How much 80% pure iron could be produced from 120 kg of 90% pure ?
1. 94.5 kg
2. 60.48 kg
3. 116.66 kg
4. 120 kg
A gaseous mixture of and gas contains 66 mass % of . The vapour density of the mixture is:
1. 6.1
2. 5.4
3. 2.7
4. 10.8
What volume of 75% alcohol by weight (d=0.80g/) must be used to prepare 150 of 30% alcohol by weight (d=0.90 g/)?
1. 67.5 mL
2. 56.25 mL
3. 44.44 mL
4. None of these
Average atomic mass of magnesium is 24.31 a.m.u. This magnesium is compound of 79 mole% of and remaining 21 mole % of and . Calculate mole% of .
1. 10
2. 11
3. 15
4. 16
A mixture of contain 30.40% mass per cent of nitrogen. What is the mass ratio of the two components in the mixture?
1. 2 : 1
2. 1 : 2
3. 3 : 4
4. 4 : 1
A mixture of and gas "Y" (mol. wt. 80) in the mole ratio a : b has a mean molecular weight 40. What would be mean molecular weight, if the gases are mixed in the ratio b : a under identical conditions? (gases are non-reacting):
1. 40
2. 48
3. 62
4. 72
If 2.74 g of the metal oxide contains 1.53 g of metal, then the empirical formula of vanadium oxide is:
(Atomic Mass of V = 52)
1.
2.
3.
4.
A gaseous mixture of propane and butane of volume 3 litre on complete combustion produces 11.0 litre under standard conditions of temperature and pressure. The ratio of volume of butane to propane is:
1. 1 : 2
2. 2 : 1
3. 3 : 2
4. 3 : 1