The normality of 10 L volume H₂O₂ is

• 0.176

• 0.88

• 1.78

• 3.52

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?

• 0.1

• 0.2

• 0.05

• 0.025

250 mL of a Na₂CO₃ solution contains 2.65 g of Na₂CO₃ 10 mL of this solution is added to x mL of water to obtain 0.001 M Na₂CO₃ solution.The value of x is (molecular weight of Na₂CO₃ = 106)

• 1000 mL

• 990 mL

• 9990 mL

• 90 mL

Which of the following represents the smallest quantity?

• 1230g

• 1.230 × 10^-4 g

• 1.230 × 10^-6 kg

• 1.230 × 10⁴ µg

235.

How is 0.0120 written as a scientific notation?

• 120 × 10^-4

• 1.2 × 10^-2

• 12 × 10^-3

• 12.0 × 10^-3

An organic compound crystallises in an ortho rhombic system with two molecules per unit cell. The unit cell dimensions are 12.05, 15.05 and 2.69 Å. If the density of the crystal is 1.419 g cm^-3, then molar mass of compound will be 

• 207 g mol^-1

• 209 g mol^-1

• 308 g mol^-1

• 317 g mol^-1

The molarity of a solution in which 5.3 g Na₂CO₃ is dissolved in 500 mL will be

• 1.0 M

• 0.1 M

• 0.20 M

• 0.2 M

If 5 L of H₂O₂ produces 50 L of O₂ at NTP, H₂O₂ is

• 50 volume

• 10 volume

• 5 volume

• None of the above

If a LPG cylinder contains mixture of butane and isobutane, then the amount of oxygen that would be required for combustion of 1 kg of it will be

• 2.50 × 10³ gm

• 4.50 × 10³ gm

• 180  × 10³ gm

• 3.58 × 10³ gm

8.50g of NH₃ is present in 250ml volume. Its active mass is

• 1.5 ML^-1

• 2.0 ML^-1

• 1.0 ML^-1

• 0.5 ML^-1