The weight of one molecule of a compound C₆₀H₁₂₂ is

1. $5.005\times {10}^{23<mspace\; width="1em"></mspace>}\mathrm{g}$

2. $6.023\times {10}^{23}<mspace\; width="1em"></mspace>\mathrm{g}$

3. $4.1\times {10}^{-21}<mspace\; width="1em"></mspace>\mathrm{g}$

4. $1.4\times {10}^{-21}\mathrm{g}$

 

Breakfast cereal is advertised to contain 110 mg of sodium per 100 grams of cereal. The percent of sodium in the cereal is:

1. 0.110%

2. 0.0110 %

3. 11.0%

4. 0.22 %

The percentage weight of Zn in white vitriol [ZnSO₄.7H₂O] is approximately equal to (Zn=65, S=32, O=16 and H=1)

1. 21.56%

2. 32.58%

3. 22.65%

4. 26.55%

A gaseous mixture contains O₂ and N₂ in the ratio 1:4 by weight. Then the ratio of their number of molecules in the mixture is

1. 3:32

2. 7:32

3. 1:4

4. 3:16

1cc N₂O at STP contains: 

A 5 molar solution of H₂SO₄ is diluted from 1 litre to a volume of 10 litres, the normality of the solution will be -

1. 0.5 N

2. 1.0 N

3. 2.5 N

4. 5 N

When 0.50 moles of BaCl₂ are mixed with 0.20 moles of Na₃PO₄, what is the maximum number of moles of Ba₃(PO₄)₂ that can be formed?

lf equal moles of water and urea are taken in a vessel,The mass percentage of urea in the solution will be -

1. 22.086

2. 11.536

3. 46.146

4. 76.92

Sodium bicarbonate on heating decomposes to form sodium carbonate, CO₂ and water. If 0.2 moles of sodium bicarbonate is completely decomposed, how many moles of sodium carbonate is formed?

1. 0.1

2. 0.2

3. 0.05

4. 0.025

A purified pepsin was subjected to amino acid analysis. The amino acid present in the smallest amount was lysine, C₆H₁₄N₂O₂ and the amount of lysine was found to be 0.431g per 100 g of protein. The minimum molecular mass of protein is:

1. 34 u

2. 3400 u

3. 34,000 u

4. 3,400,000 u