Commercial 11.2 volume H₂O₂ solution has a molarity of :

• 1.0

• 0.5

• 11.2

• 1.12

100 g CaCO₃ is treated with 1 L of 1N HCl. What would be the weight of CO₂ liberated after the completion of the reaction ?

• 55 g

• 11 g

• 22 g

• 33 g

Law of multiple proportions is illustrated by one of the following pairs :

• N₂O and NO

• H₂S and SO₂

• NH₃ and Na₂O

• BeO and BeCl₂

Avogadro's hypothesis states that :

• the ideal gas consists of a large number of small particles called molecules

• under the same conditions of temperature and pressure equal volumes of gases contain the same number of molecules

• volume of a definite quantity of gas at constant pressure is directly proportional to absolute temperature

• a given mass of gas at constant pressure is directly proportional to absolute temperature

95.

If 117 gm NaCl is dissolved in 1000 g of water the concentration of the solution is said to be :

• 2 molar

• 2 molal

• 1 normal

• 1 molal

A solution of 4.5 g of a pure non-electrolyte in 100 g of water was found to freeze at 0.465°C. The molecular weight of the solute is closest to (k_f =1.86)

• 180.0

• 135.0

• 172.0

• 90.0

Irrespective of the source, pure sample of water always yields 88.89% mass of oxygen and 11.11 % mass of hydrogen. This is explained by the law of; 

• conservation of mass

• constant composition

• multiple proportion

• Gay-Lussa

32g of O₂, 2g of H₂ and 28g of N₂ at STP, occupy separately a volume of:

• 1L

• 2L

• 22.4L

• 2.24L

Identify the incorrect statement :

• The molarity of a solution is independent of temperature

• The tendency for catenation is much higher for carbon than for silicon

• Nitriles and iso nitriles constitute metamers

• t-butyl 1-carbocation has planar carbons and is very reactive

The pH of 0.005 M H₂SO₄ is :

• 2.5

• 1.5

• 1.0

• 2.0