Question # 1

The value of R is SI units is

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0.0821 dm³. atm. J^-1mole^-1

62.4 dm³torr K^-1mole^-1

8.31 dm³atm. K^-1mole^-1

8.31 JK^-1mole^-1

The molecular mass of a polymer is obtained by multiplying mass of the monomer unit with the degree of polymerization, The degree of polymerization of PVC is 1000.What is molecular mass?

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65000

63000

62000

60000

Equal volume of all gases at same temperature and pressure contain number of molecules:

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multiples

equal

different

in fractions

Suspended matter is settled in purification of water by:

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aeration

coagulation

chlorination

treatment

Setting process of cement is based on:

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Hydrolysis

Dehydration

Hydration

Oxidation

Eleven elements made part of earth mass:

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97.5%

98.5%

99.5%

100%

Haemoglobin molecule is how many times heavier than helium atom

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68000 times

17000 times

,34000 times

, 1700 times

Monosacharide belong to the group

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Fats

Carbohydrates

Lipids

Proteins

Which of the following is not glyceride

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Soap

Phospholipids

Oil

Fat

With increase in temperature, ionic product of H2O

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Decreases

Remains same

Increases

May increase or decrease

Amount of product formed increases with time, this statement is true for reactions-------with kinetics

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1s order

3rd order

zero order

Any order

Which of the following is a not typical transition element

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Cr

Mn

Zn

Fe

The pH range of the acid rain is:

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7 - 6.5

6.5 - 6

6 - 5.6

Less than 5

Ozone in most of the tropical regions acts as a pollutant and causes

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Damages to eyes

Aggravates asthma

Chest discomfort

All of these

All are ortho & Para directing except

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X

OH

NR₃

NH₂

Corrundam is ore of:

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Li

Be

B

Al

A solution of two component is called

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Binary solution

Dilute solution

Original solution

Standard solution

An electrochemical cell is based upon

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Acid-base reaction

Redox reaction

Nuclear reaction

None of the above

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-778.9 KJ

788.0 KJ

-1.9 KJ

+1.9 KJ

Molarity of pure water is :

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33.3

55.5

44.4

66.6

The number of unpaired electrons in the p-subshell of oxygen atom

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1

2

3

4

Poly hydroxyl compounds of aldehyde and ketones are:

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Carbohydrates

Proteins

Fats

Lipids

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