Question # 1

Benedict solution gives a positive test with but catalyze the same reaction:

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fructose

glucose

starch

sucrose

Macromolecules are classified:

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inorganic

organic

biopolymer

synthetic

Which one is a non-polar compound?

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SnCl2

PH3

Gecl4

H2O

Insoluble ferric oxide is produced in the pH range:

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1 to 8

6 to 9

3 to 13

8 to 13

The lattice energy of NaCl is

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787 j/ mole

790 kj/mol

780 kJ/ mol

-787 kI / mole

For an ideal gas,number of moles per litre in terms of its pressure P,gas constant R and temperature T is

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PT/R

PRT

P/RT

RT/P

At present the number or cement factories in Pakistan are:

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20

22

25

30

Activity of the enzyme is reduced by

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temperature

concentration

pH

inhibitors

A crystal system in which all three angles and all three edges are different is called

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triclinic

rhombohedral

cubic

hexagonal

What is true about an alcohol and phenol

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Both are more acidic than water

Both react with NaOH

Both produce CO2 with Na2CO3

Both, produce H2 with Na

Unit of the rate constant depends upon the

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Molecularity of reaction

Order of reaction

Concentration terms

Number of reactants

Internal energy of a system is equal to

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Kinetic energy of particles

Potential energy due to binding forces between particles

Sum of kinetic energy plus potential energy of the particles

Heat contents

Common names of carboxylic acids are given by then:

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Source

Person discovered

place

habit

Which of the following oxides is amopheric in character?

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CaO

CO₂

SiO₂

SnO₂

Which of the following is not a fatty acid

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Propanoic acid

Acetic acid

Phthalic acid

Butanoic acid

Which is not true with respect to cathode rays?

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A stream of electrons

Charged particles

Move with speed as that of light

Can be deflected by magnetic fields

In which type of following solutions we don't know the total volume of the solutions :

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Percentage weight/weight

Percentage weight/volume

Percentage volume/volume

Percentage volume/weight

Negatively charged particle nature of cathode rays was first demonstrated in 1895 by:

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Millikan.

J. Perrin.

Hittrof

J.J. Thomson.

Which substances haveΔH =ΔE

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Solids

Liquids

Gases

Liquids and solids

In a Galvanic cell, the electrons flow from

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A node to cathode through the solution

Cathode to anode through the external circuit

Anode to cathode through the external circuit

Which of the following is an aromatic compound

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Propanol

Cyclohexane

Acetone

Benezene

Positive particle in discharged tube is produced by ionization of gas molecules, which is caused by

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Gas molecules collide with anode

Gas molecules are at high temperature

Gas molecules produce X-rays

Cathode rays remove electrons from gas molecules

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