5 moles of AB₂ weigh 125 × 10⁻³ kg and 10 moles of A₂B₂ weigh 300 × 10⁻³ kg. The molar mass of A(M_A) and molar mass of B(M_B) in kg mol⁻¹ are :

a)

M_A = 25 × 10⁻³ and M_B = 50 × 10⁻³

b)

M_A = 50 × 10⁻³ and M_B = 25 × 10⁻³

c)

M_A = 5 × 10⁻³ and M_B = 10 × 10⁻³

d)

M^A = 10 × 10⁻³ and M_B = 5 × 10⁻³

Question

Question ID - 56410 :-
5 moles of AB₂ weigh 125 × 10⁻³ kg and 10 moles of A₂B₂ weigh 300 × 10⁻³ kg. The molar mass of A(M_A) and molar mass of B(M_B) in kg mol⁻¹ are :

a)

M_A = 25 × 10⁻³ and M_B = 50 × 10⁻³

b)

M_A = 50 × 10⁻³ and M_B = 25 × 10⁻³

c)

M_A = 5 × 10⁻³ and M_B = 10 × 10⁻³

d)

M^A = 10 × 10⁻³ and M_B = 5 × 10⁻³

1 Answer

5876 Votes

score 3537 · Accepted Answer

Answer Key : (c) -

5 mol AB₂ weighs 125 g

AB₂ = 25 g/mol

10 mol A₂B₂ weighs 300 g

A₂B₂ = 30 g/mol

Molar mass of A = 5

Molar mass of B = 10

By heating phenol with chloroform in alkali, it is converted into
a)	Salicylic acid	b)	Salicyladehyde	c)	Anisole	d)	Phenyl benzoate

a)	M_A = 25 × 10⁻³ and M_B = 50 × 10⁻³	b)	M_A = 50 × 10⁻³ and M_B = 25 × 10⁻³
c)	M_A = 5 × 10⁻³ and M_B = 10 × 10⁻³	d)	M^A = 10 × 10⁻³ and M_B = 5 × 10⁻³