Question # 1

Kw for water at 0 oc is 0.1 x 10^-34 and at 100 ^oC 7.5 x 10^-14, How many times dissociation of water increase from 0 ^oCto 100 ^oC

Choose an answer

7.5 times

50 times

75 times

100 times

A buffer solution can be prepared by mixing

Choose an answer

Weak acid and its salt with weak base

Weak base and its salt with strong acid

Strong acid and its salts with weak base

Strong base and its salt with weak acid

Which statement is correct about solubility product constant.

Choose an answer

It is applicable at highly soluble substances.

Value of Kap is independent of temperature

It is used for homogeneous aquarium system

It can be used to predict that precipitation will take place or not by combining two ions

An excess of aqueous silver nitrate is added to aqueous barium chloride and precipitate is removed by filtration. What are the main ions in the filtrate

Choose an answer

The unit of Kc for the reaction N2 +O2 = 2NO will be

Choose an answer

mol dm-3

mol-1 dm+3

mol-2 dm+6

No units

_________ was derived by C.M Guldberg and P Waage in 1864

Choose an answer

Law of conservation of Mass

Law of mass action

Law of conservation of energy

Distribution law

A solution has pH zero. Its H+ ions concertation will

Choose an answer

zero

More than unity

Less than unity

Unity only

pH of rain water.

Choose an answer

7

Slightly basic

slightly acidic

Highly basic

For which system does the equilibrium constant K_chas units of (concentration)^-1

Choose an answer

Some impurities of MgCl2 are present in NaCl which separation technique can be used to separate the impurities.

Choose an answer

Filtration

Crystallization

Common ion effect

Chromatography

When small amount of acid or base is added to buffer, its pH.

Choose an answer

Remain same

Always increases

Always decreases

slightly increases or decreases

pKa of CH3COOH is 4.74. The pKb value of CH3COO- ions will be

Choose an answer

7

14

9.26

zero

The pH of human blood is

Choose an answer

7.0

7.4

4.0

6.5

The pK_avalue of CH₃COOH is 4.74 when we mix CH₃COOH and CH₃COONa in the ratio of 10:1, tehn the pH of the buffer is

Choose an answer

4.74

5.74

3.74

7.00

One dm3 of a buffer solution containing 0.01 M NH4Cl and 0.1 M NH4OH having pKa of 3 has pH.

Choose an answer

4

6

9

10

If the volumes of reactants and products are same in a gaseous phase reaction, then the equilibrium state is not affected by

Choose an answer

Change of temperature

Change of pressure

Change of concentration

Catalyst

Catalyst used in preparation of NH3 from N2 and H2 is.

Choose an answer

Ni

Fe

Pt

V2O5

More Classes

Other Links

Chemistry Fsc Part 1 Chapter 8 Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer