Question # 1

Plastics are a pollution problem because many plastics

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are made from petroleum

are very inflammable

burn to produce toxic fumes

decompose to produce toxic products

Which of the following does not represent a type of crystal system

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Triclinic

Monoclinic

Rhombohedral

Isotropical

In which of these processes are small organic molecules changed into macromolecules?

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the fractional distillation of crude oil

the cracking of petroleum fractions

the hydrolysis of proteins

the polymerization

In MgCl2, the oxidation state ofCI is

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Zero

-2

+2

-1

The rate diffusion of H₂is 4 times than the of an unknown gas at same temperature and pressure, the molecular mass of unknown gas is

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32

16

4

64

Cellulose is the polymer of

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α-D-glucose

β-D-glucose

Fructose

None

Wt. of 112 ml of oxygen at NTP on liquifaction would be

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0.32 g

0.64 g

0.16 g

0.96 g

Which one is very weak acid

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HF

HCI

H2CO3

H2O

Starch is a polymer is of:

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sucrose

fructose

α-D-Glucose

lactose

Total number of valence electrons in CH4

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8

9

10

12

Which of the following represents peptide linkage

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-C=N-

-CO-NH-

-CH₂-NH-

-CH-NH-

Which one of the following is a water soluble vitamin

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D

K

A

Ascorbic acid (Vic C)

Which of the element is not alkali metal

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Lithium

Rubidium

Francium

Magnesium

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The ionization energy of A is high and electron affinity of B is low

The ionization energy of A is low and electron affinity of B is high

Both the ionization energy of A and electron off affinity of B are high

Both the ionization energy of A and electron affinity of B are low

An oil or fat with no double bond have iodine number:

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Zero

100%

50%

Minimum

The entropy of the universe

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Constant

Is equal to zero

Decreasing

Increasing

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8 g

16 g

32 g

24 g

The chemical formula of magnesite is

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MgCl₂

Mg(HCO₃)₂

MgCO₃

None of these

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Equal volumes of N₂and H₂are reacting

Equal masses of N₂and H₂are reacting

The reaction has stopped

The same amount of ammonia is formed as is decomposed into N₂and H₂

The acid used in lead storage cells is

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Phosphoric acid

Nitric acid

Sulphuric acid

Hydrochloric acid

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Addition Elimination

Addition Reduction

Elimination Reduction

Substitution Elimination

What mass of NaOH is required to prepare 2.5 dm³of 1.5 M NaOH solution

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130 g

140 g

150 g

160 g

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