Question # 1

Which one of the following enzymes brings about the hydrolysis of fats

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Urease

Maltase

Zymase

Lypase

Which of these the most widely used nitrogen fertilizer in Pakistan?

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urea

ammonium nitrate

ammonium sulphate

ammonium chloride

In s solution 7.8 g of benzene ( C6H6 ) and 46g of toluene (C6H5CH3) is present. The mole fraction of toluene is

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1/3

1/5

2/3

5/6

Why is CO called as pollutant? reason is:

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It combines with oxygen

It inactivates glycoblysis

It combines with hemoglobin

Inactivates nerves

Ricket is caused due to the deficiency of vitamin

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A

D

B

E

Amides are

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Strongly basic

Weakly basic

Acidic

Strongly

Choose the chief air pollutant among the following which depletes ozone layer:

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carbon monoxide

carbon dioxide

chloroflurocarbons and nitrogen oxides

sulphur dioxide

Which of the following protein is used to make buttons

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Gelatin

Callogen

Albumin

Casein

Which of the following statements is incorrect about vitamins

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often function as coenzymes

molecules contain at least one ring structure

are often synthesized by the body

are polyfunctional compounds

What is the numerical value of 'R; (the gas constant) in S.I units?

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83143 J/mole/K

Avogadro's law

83.143 J/mole/K

8.3143 J/mole/K

On the basis of intermolecular forces diamond is a

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ionic solid

covalent solid

metallic solid

molecular solid

An electric current is passed through silver voltameter connected to a water voltmeter. The cathode of the silver voltameter is 0.108 g more at the end of the electrolysis. The volume of oxygen evolved at STP is

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56 cm³

550 cm³

5.6 cm³

11.2 cm³

General formula of carbocyclic acids is:

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RCOH

RCOR

RCOOR

R-OH

The solution of which acid is used for seosoning of food ?

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Formic acid

Acetic acid

Benzoic acid

Butanoic acid

Either, an organic compound has close resemblance in structure and thus a derivative of:

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Water

Oxides of lithium

Oxides of magnisium

Oxides of aluminium

Some of the elements of a period show similar behavior with the elements of next group in next period this is called

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Vertical relationship

Oblique relationship

Diagonal relationship

None

10g Of NaOH Has Been Dissolved Perdm³of solution. The morality of solution is :

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0.025 M

1.5 M

0.1 M

.25 M

Splitting of spectral lines when atoms are subjected to strong electric field is called:

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Zeeman effect.

Stark effect

Photoelectric effect.

Compton effect.

Urea has concentration when prepared before prlilling:

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46%

82%

99.7%

100%

Balmer's series is in ______ region

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Visible

U V

I. R.

None

10% aqueous solution of NaCI has molarity

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1.7 M

2.7 M

0.17 M

3.7 M

How many zones through which the charge passes in a rotary kiln

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4

3

2

5

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