3 g of oxide of a metal is converted to chloride completely and it yielded 5 g of chloride. The equivalent weight of metal is

• 12

• 20

• 33.25

• 2.325

4.9 g of H₂SO₄ is present in 100 mL solution. The molarity and normality of the solution will be

• Molarity = 1M, Normality= 0.5N

• Molarity = 1M, Normality= 0.25N

• Molarity = 0.5M, Normality= 1N

• Molarity = 2M, Normality= 3N

0.0833 mole of a carbohydrate of empirical formula CH₂O contains 1.00 g of hydrogen. The molecular formula of the carbohydrate is.

• C₅H₁₀O₅

• C₃H₄O₃

• C₁₂H₂₂O₁₁

• C₆H₁₂O₆

When 50cm³ of 0.2N H₂SO₄ is mixed with 50 cm³ of 1N KOH, the heat liberated is

• 11.46 kJ

• 57.3 kJ

• 573 kJ

• 573 J

415.

Heat liberated with 100 mL of 1 N NaOH is neutralised by 300 mL of 1 N HCl

• 11.56 kJ

• 5.73 kJ

• 22.92 kJ

• 17.19 kJ

A solution contains 1.2046 x 10²⁴ hydrochloric acid molecules in one dm³ of the solution. The strength of the solution is

• 6N

• 2N

• 4N

• 8N

4g of copper was dissolved in concentrated nitric acid. The copper nitrate solution on strong heating gave 5 g of its oxide. The equivalent weight of copper is

• 23

• 32

• 12

• 20

The volume of water to be added to $\frac{\mathrm{N}}{2}$ to prepare 500 mL of $\frac{\mathrm{N}}{10}$ solution is

• 450 mL

• 100 mL

• 45 mL

• 400 mL

The equivalent weight of a certain trivalent element is 20. Molecular weight of its oxide is

• 152

• 56

• 168

• 68

What is the volume of "20 volume H₂O₂" required to get 5000 cm³ of oxygen at STP?

• 250 cm³

• 50 cm³

• 100 cm³

• 125 cm³