Question # 1

The expected specific waste fo petroleum industry is.

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Asphalt and tars

Paper

Cloth

Fibre

Which number of halogen family does not show positive oxidation state.

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Fluorine

Chlorine

Bromine

Iodine

How many planes of symmetry are present in benzene.

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1 plane

3 planes

5 planes

7 planes

Enzymes are

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Complex non living compunds

Laving organisms

Complex protein molecules

Bacterial colonies

The IUPAC name of ethylene oxide is.

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Epoxy methane

Oxcethene

Methoxymethane

All of the above

Which of the following equations is the most general equation of state.

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Vander Waal's equation

Dielectric equation

Clasuaiua equation

Kamberling Onnes equation

In their ionic compounds halogens exhinit the oxidation states of.

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-1

-2

-3

-4

Which of the following is not an ore of nickel.

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Pentalandite

Siderite

Garnierite

Nicollite

Length of semiconductor nanorods are in the range of.

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1.50 nm

1-50 micro meter

100-500 nm

50-100 nm

Which of the following method is based on the solubility difference between the analyte and the unwanted components.

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Distillation

Complex formation

Electrodepostion

Precipitation

Vitamin D1 is chemically known as

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Ergocalciferol

Tocopherol

Aserphthol

Phylloquinone

In the Lewis formula of which of the following species, the number of single double and dative bonds are equal

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N2O5

HNO3

SO2

SOCl2

When SI is dipped with As, it becomes

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Superconductor

p-type conductor

N-type conductor

None of these

A man has to think of alternate sources of energy due to

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Shortage of vehicles

Shortage of fossil fuels

Construction of house

Running of power plant

Galvanized steel are steel products coated with

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Carbon

Sulphur

Zinc

Iron

Thermocouples have been constructed from

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Chromel ve elumel

Copper vs platinum

Both

None

Disease caused by eating fish found in water contaminated with industrial waste having mercury is.

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Minamata disease

Bright's disease

Hashimoto's disease

Osteoaclerosis

The elements with highest electron affinity belongs to.

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Period 2 , group 17

Period 3, group 17

Period 2, group 18

Period, 2 , group 1

The correct order of acid strength is.

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HIO4 > HBrO4 > HCIO4

HCIO4> HBrO4 > HIO4

HBrO4 > HIO4 > HCIO4

HBrO4 > HCIO4 > HIO4

According to Usanovich concept a base is defined as any species.

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Capable of giving up anions

Combining with cations

Neutralizing an acid to give a salt

All of above

Which of the following methods gives the number average molecular weight of a polymer.

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Light scattering method

Osmotic method

Sedimentation equilibrium method

Viscosity method

Which of the following responsible for depletion of ozone layer in upper strata of the atmosphere.

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Polyhalogens

Ferrocene

Freons

Fullerencs

Since the acid gives both acidic and normal salts so the acid is.

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di acid

di basic

double salt

Any of above

Electron gas theory fails to explain

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Specific heat of metals

Electrical and thermal conductivity

Paramagnetic behavior of metals

All of the above

When orthoboric acid is heated strongly it gives.

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B2O3

H2B3O7

HBO2

B

How many unpaired electron are there in a strong field iron (II) octahederal compled.

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0

1

2

4

Aluminum is usually extracted from

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Bauxite

Corundum

Feldepar

Alumite

Copper occurs in nature as.

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Native

Combined

Both native and combined

None of the above

It is known that AgCl is insoluble in HNO3 but dissolves readily in NH4OH solution .Which of the following statement is not correct.

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Ag ion reacts to form complex with NH4OH solution

The concentration of Ag ion decreases

Ionic product is less than the solubility product

Ionic product is greater than solubility product

Which of the following is an example of super octet molecules.

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C1F3

IF7

PCl5

All the three

It has been observed that if one goes on adding KNO3 solution to a precipitate of AgCl the solubility of these precipitates goes on increasing with increasing concentration of K+ and NO3= ions which are not common to AgCl This is due to which effect.

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Divers ion effect

Uncommon ion effect

Activity effect

All above

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