11.

The pH value of decinormal solution of NH₄OH which is 20% ionised is

• 12.95

• 12.30

• 14.70

• 13.30

Which of the following option w.r.t. increasing bond order is correct ?

• NO < C₂ <O₂^- <He₂⁺

• C₂ < NO < He₂⁺ < O₂^-

• He₂⁺ < O₂^- < NO  < C₂

• He₂⁺ < O₂^- < C₂ < NO.

In which of the following reaction K_p> K_c ?

• ${\mathrm{PCl}}_3 + {\mathrm{Cl}}_3 \to {\mathrm{PCl}}_5$

• ${\mathrm{H}}_2+{\mathrm{I}}_2 \to 2\mathrm{HI}$

• $2{\mathrm{SO}}_3 \to {\mathrm{O}}_2 + 2{\mathrm{SO}}_2$

• ${\mathrm{N}}_2+ 3{\mathrm{H}}_2 \to 2{\mathrm{NH}}_3$

Which of the following is a characteristic of a reversible reaction?

• It never proceeds to completion

• It can be influenced by a catalyst

• It proceeds only in forward direction

• Number of moles of reactants and products are equal.

How many litres of ammonia gas at S.T.P. would 1 be needed to prepare 100 ml of 2.5 M ammonium hydroxide solution?

• 5.6 L

• 0.056 L

• 11.2 L

• 0.56 L

The equilibrium constant of a reaction is 300. If the volume of a reaction flask is trippled, the equilibrium constant will be

• 300

• 100

• 600

• 150

Which of the following is the correct sequence of atomic weights of the given elements?

• Ni> Co> Fe

• Fe> Co> Ni

• Co> Fe> Ni

• Co> Ni> Fe

A solution with pH = 2 is more acidic than one with a pH =6, by a factor of

• 4000

• 5000

• 8000

• 10,000

The BCl₃, is a planar molecule where as NCl₃, is pyramidal. because

• B-Cl bond is more polar than N-Cl bond

• N-Cl bond is more covalent than B-Cl bond

• nitrogen atom is smaller than boron atoms

• BCl₃  has no lone pair but NCl₃ has a lone pair of electrons.

If 0.189 g of a chlorine containing organic compound gave 0.287 g of silver chloride, then the percentage of chlorine in the organic compound is

• 35.47

• 35.57

• 37.57

• 45.37