The value of amu is which of the following?

• 1.57 $\times$ 10^-24 kg

• 1.66 $\times$ 10^-24 kg

• 1.99 $\times$ 10^-23 kg

• 1.66 $\times$ 10^-27 kg

For a reaction, A + 2B $\to$ C, the amount of C formed by starting the reaction with 5 moles of A and 8 moles of B is :

• 5 mol

• 8 mol

• 16 mol

• 4 mol

Mass of one atom is 6.66 x 10^-23 g. Its percentage in an hydride is 95.24. Thus , hydride is :

• MH

• MH₂

• MH₃

• MH₄

Calculate the radius of a water molecule assuming to be spherical (density= 1 g mL^-1) :

• 1.925 10^-8 cm

• 1.925x 10^-9 cm

• 1.925 10^-10 cm

• 1.925 10^-11 cm

When 6 g of a monobasic acid is dissolved in 100 mL solution , it is l N. What is equivalent mass of the acid ?

• 20 g equiv^-1

• 40 g equiv^-1

• 60 g equiv^-1

• 80 g equiv^-1

When 2.495 g of CuSO₄ · x H₂O (molar mass 249.5) is heated, 0.05 mole of H₂O is lost. Therefore , x is :

• one

• three

• five

• seven

The number of H⁺ ion in half normal solution of Na₂CO₃ and CH₃COOH :

• > 10^-7 m

• 10^-7 m

• < 10^-7

• 10^-5 m

The amount of BaSO₄ precipitated on mixing BaCl₂ (0.5 M) with H₂SO₄ (1 M) will correspond to

• 0.5 M

• 1.0 M

• 1.5 M

• 2.0 M

How many significant figures are present in 0.0000135?

• 7

• 8

• 4

• 3

100 cc of 0.6 N H₂SO₄ and 200 cc of 0.3 N HCl were mixed together .The normality of the solution will be :

• 0.2 N

• 0.4 N

• 0.8 N

• 0.6 N