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MDCAT Chemistry Chapter 20 Macromolecules Online Test MCQs With Answers

Question # 1

The solubility product is only applicable for those substance whose molar concentrations is

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0.01

Equal to 1

Less than 0.01

Greater than 10

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Question # 2

Correct relationship b/w Kc and Kp can be written as

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Kp=, Kc(R)∆n

Kc=Kp (RT)∆n

Kp.= Kc.(RT)∆n

Kp=Kc (R/N)∆n

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Question # 3

For N2: +3H2<--------> 2NH3, if Kc is 1 than value of Kp at 273K would be

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1/22.414

1/(22.414)2

22.414

11.207

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Question # 4

A basic buffer solution can be prepared by mixing

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Strong acid and its salt with weak base

Weak base and its salt with strong acid

Strong base and its salt with weak acid

Weak acid and its salt with strong base

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Question # 5

The solubility product of AgCl is
2.0 x 10(-10) mol2 dm(-6). The maximum concentration Ag+ ions in the solution is:

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1.41 × 10(-5) mol. dm(-3)

1.41 × 10(-10) mol. dm(-3)

2.0 × 10(-10) mol. dm(-3)

4.0 × 10(-20) mol. dm(-3)

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Question # 6

The Kw. of water at 25 C° is given by

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10(-7)

10(-10)

10(-12)

10(-14)

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Question # 7

Which one is very weak acid

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HCI

H2CO3

H2O

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Question # 8

When HCI gas is passed through saturated solution of rock salt, the solubility of NaCl

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Increases

May increase or decrease

Decreases

None of these

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Question # 9

The solubility of Fe(OH)3 is 'x' mole per dm3. Its Ksp would be

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9X3

3X4

27X4

9X4

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Question # 10

Which one is best buffer those have

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pH = pKa

pH > pKa

pOH < pKb

pKa =0

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Question # 11

For the reaction H2(g) +I2 (g) <---------> 2Hl(g). The equilibrium constant changes with

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Total pressure

Catalyst

Concentration of H2 and I2

Temperature

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Question # 12

Buffer solutions are used in except

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Clinical analysis

Nutrition

Soil science

Qualitative analysis

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