- Elements X and Y combine to form two compounds XY and X2Y. Find the atomic weight of X and Y, if the weight of 0.1 moles of XY is 10g and 0.05 moles of X2Y is 9g?
a) 30, 20
b) 80, 20
c) 60, 40
d) 20, 30 - Find the volume of O2 required to burn 1 L of propane completely, measured at 0℃ temperature and 1 atm pressure?
a) 10 L
b) 6 L
c) 5 L
d) 7 L
3- A gas X has Cp and Cv ratio as 1.4, at NTP 11.2 L of gas X will contain_______ number of atoms?
a)a- 6.02 × 1023
b) 1.2 × 1023
c) 3.01 × 1023
d) 2.01 × 1023
4- A vapor whose partial pressure is less than its equilibrium vapor pressure is called a __ vapor.?
a) Saturated
b) Superheated
c) Supersaturated
d) None of these
5- Dissolving a solute in a solvent does not change its?
a) Specific heat
b) Vapor pressure
c) Viscosity
d) None of these
6- Methane is mixed with stoichiometric proportion of oxygen and completely combusted. The number of additional specifications required to determine the product flow rate and composition is?
a) 1
b) 2
c) 3
7- Concentration of a solution expressed in terms of __ is independent of temperature.?
a) Molarity
b) Molality
c) Normality
d) None of these
8- A vapor that exists above its critical temperature is termed as a __ vapor.?
a) Saturated
b) Unsaturated
c) Gaseous
d) Sub-cooled
9- Which of the following is followed by an ideal solution??
a) Amagat’s law
b) Raoult’s law
c) Trouton’s rule
d) Boyle’s law
10- Which of the following gases is the most soluble in water??
a) CO2
b) CH4
c) NH3
d) H2S
11- 6 gms of magnesium (atomic weight = 24), reacts with excess of an acid, the amount of H2 produced will be __ gm.?
a) 0.5
b) 1
c) 3
d) 5
12- A container has an equal mass of H2, O2 and CH4 at 27℃, the ratio of their volume is?
a) 16:8:1
b) 16:1:2
c) 8:1:2
d) 8:16:1
13- The mass of carbon-12 atom considered in the definition of a mole is?
a) 0.012 kg
b) 0.12g
c) 120 mg
d) 12 mg
14- 0.32 gm of a metal on treatment with an acid gave 112mL of hydrogen at STP. Calculate the equivalent weight of the metal.?
a) 24
b) 32
c) 12
d) 58
15- Which of the following is not a homogenous mixture??
a) Air
b) Smoke
c) Aqueous solution of sugar
d) Brass
