Entry Test MCQ :: Chemical Equilibrium

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21.

When the value of Kc is very small then

A.	reaction is at start	B.	product conc. Is maximum
C.	reactant conc. Is minimum	D.	reaction is completed

22.

Catalyst used to speed up the reaction of ammonia synthesis is

A.	V2O5	B.	V2O5 and Pt
C.	Fe	D.	Pieces of Fe crystals are embedded in fused mixture of MgO Al2O3 and SiO2

23.

Temperature for preparation of SO3 is

A.	400-500?C	B.	400?C
C.	600?C	D.	200?C

24.

By the addition of base in waterpH will be

A.	more than 7	B.	less than 7
C.	equal to 7	D.	no effect

25.

Idea of pH and pOH was put forward by

A.	Gibbs	B.	Einstein
C.	Sorenson	D.	Chadwick

26.

Negative log of mular concentration of H+ ions is called

A.	pH	B.	pOH
C.	pKa	D.	pKw

27.

Ka<10-3 means

A.	Very strong base	B.	Very weak acid
C.	Very strong acid	D.	Very strong salt

28.

Any substance which accepts H+ is base favours the concept

A.	Lowrys	B.	Lewis
C.	Arrhenius	D.	None of these

29.

Conjugated base of a weak acid is

A.	weak	B.	strong
C.	moderately weak	D.	unstable

30.

When sparingly soluble salt is in equilibrium with molar concentration of its oppositely charged ion when the product is called

A.	common ion effect	B.	solubility product
C.	dissociation constant	D.	dissociation constant for an acid