Entry Test MCQ :: Chemical Equilibrium

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11.

Which set of solutes will form a buffer when dissolved in water to make 1 litter of solution?

A.	0.0002M HCI	B.	0.2 mole of NaCI with 0.2 mole of HNO3
C.	0.4 mole of CH3COOH with 0.4 mole of NaOH	D.	0.4 mole of NH3 with 0.2 mole of HCI

12.

Which one of the following aqueous solutions will be basic?

A.	NaCI	B.	Na2SO4
C.	Na2CO3	D.	FeCl3

13.

The value of Kw in an acidic aquueous solution at 298 K is

A.	>10-14	B.	<10-14
C.	101?	D.	10-1?

14.

Reaction which proceeds in both directions is called

A.	reversible	B.	irreversible
C.	spontaneous	D.	non-spontaneous

15.

Chemical equilibrium state is

A.	dynamic state	B.	static state
C.	free state	D.	unidirectional state

16.

Conversion of reactant into product in unit time is called

A.	rate of forward reaction	B.	rate of backward reaction
C.	rate constant	D.	rate co-efficient

17.

At start of reaction the concentration of reactants is

A.	high	B.	low
C.	according to Kc	D.	constant

18.

Unit of Kc is

A.	moles2dm+6	B.	moles-2dm+6
C.	moles+2dm-6	D.	Kc may or may not have units

19.

In case of gases Kc is replaced by

A.	Ka	B.	Kb
C.	Kp	D.	K

20.

Rate expression for ammonia synthesis is

A.	Kc=x2/(a-x)(b-x)	B.	Kc=x2/v(a-x)
C.	Kc=4x2/(a-2x)2(b-x)	D.	Kc=4x2v2/(a-x)(b-3x)3