Quiz on Mole Concept

• a

• b

• c

• d

• a

• b

• c

• d

10 g of hydrogen and 64 g of oxygen were filled in a steel vessel and exploded. Amount of water produced in this reaction will be,

• (a) 3 mol

• (b) 4 mol

• (c) 1 mol

• (d) 2 mol

When 22.4 liters of H2(g) is mixed with 11.2 liters of Cl2(g), each at STP, the moles of HCl(g) formed is equal to

• (a) 1 mol of HCl(g)

• (b) 2 mol of HCl(g)

• (c) 0.5 mol of HCl(g)

• (d) 1.5 mol of HCl(g)

Molarity of liquid HCl, if density of solution is 1.17 g/cc is

• (a) 36.5

• (b) 18.25

• (c) 32.05

• (d) 42.10

The number of oxygen atoms in 4.4 g of CO2 is

The density of 2 M aqueous solution of NaOH is 1.28 g/cm3 . The molality of the solution is [Given that molecular mass of NaOH = 40 g mol–1]

• (a) 1.20 m

• (b) 1.56 m

• (c) 1.67 m

• (d) 1.32 m

• (a) 10.8

• (b) 10.2

• (c) 11.2

• (d) 10.0

The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber’s process is

• (a) 40

• (b) 10

• (c) 20

• (d) 30