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#1 | Mole Concept
(Chemistry) > Some Basic Concepts Of Chemistry
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Related Practice Questions :
Mole fraction of the solute in a 1.00 molal aqueous solution is
(a) 0.0177
(b) 0.0344
(c) 1.7700
(d) 0.1770
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6.02x1020 molecules of urea are present in 100mL of its solution. The concentration of solution is
(a) 0.02M
(b) 0.01M
(c) 0.001M
(d) 0.1M
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The number of moles of oxygen in 1L of air containing 21% oxygen by volume, under standard conditions, is
(a) 0.0093 mole
(b) 2.10 moles
(c) 0.186 mole
(d) 0.21 mole
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Percentage of Se in peroxidase anhydrase enzyme is 0.5% by weight (at. weight = 78.4), then minimum molecular weight of peroxidase anhydrase enzyme is
(a) 1.568 x 103
(b) 15.68
(c) 2.168 x 104
(d) 1.568 x 104
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