Question # 1

Anything that influence the valence electrons will affect the chemistry of the element Which of the following factors does not affect the valency shell.

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Valence principle quantum number in

Nuclear charge (Z)

Nuclear mass

Number of core electrons

The number 7.65 is rounded to.

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7.6

7.7

7.5

7.8

Which of the following compounds combines with hemoglobin.

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CO2

CO

NO

N2

Long diseases are about four times more in urban areas as compared to rural areas. This is due to the presence of which of the following. in atmosphere.

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CO2

NO2

O2

N2

Which of the group 13 element does not form M (III) idodie.

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Al

Ga

Ti

In

Among all halogens no oxyacid of the following is known

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F

Cl

Br

I

Acid rain effects

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Human being

Crops

Aquatic life

All above

Which of the following process involves the use fo organic compound as an electron acceptor.

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Aerobic respiration

Anaerobic respiration

Fermentation

Glycolsis

Calander stock is a process in paper making in which.

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Thickness of the paper is reduced

Surface of paper is made smooth

Moisture is removed

Both A and B

The addition of HCl in the presence of poroxule does not follow anti Markovnikov's rule because.

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HCl bond is too strong to be broken homolytically

Cl atom is not reative enough to add on to a double bond

Cl combines with H to give back HCl

HCl is a reducing agent.

The bond along Sp2 hybridization is.

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180^o

120^o

109.5^o

160^o

The use of acids to remove oxides and acids on hot worked steels is known as

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Tempering

Picking

Machining

Sizing

Photochemical among is related to pollution of

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Air

Water

Soil

All of the above

Tetra halides do not undergo hydrolysis

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C

Si

Sn

Pb

Which compound among the following does not contain an ionic bond.

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NaOH

HCl

KaS

LiH

Argillaceous material does not include.

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Vlay

Marine shells

Slate

Blast furnace slag

H-Bond has a preferred bonding direction like

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Ionic bond

Covalent bond

Co ordinate bond

None of these

Potassium reacts with excess of oxygen to form

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K2O

K2O2

KO2

K2O3

If diesel has cetane number of 50 then the diesel index will be.

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36

46

56

66

Molten iron withdrawn from the blast furnace is called.

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Wrought iron

Pig iron

Bessemer iron

Stainless steel

Which of the following does not belong in the group of herocyclic dyes.

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Acridine

Cyanine

Methylene blue

Amido black

The unit of sodium chloride structure is.

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Linear

Cubic

Tetrahedral

Square planner

When a large block of silicon wafer is reduced to smaller component and hence non material is formed this approach is called.

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Bottom up

Top down

Left to right

Right to left

Which of the following detector is used in GC analysis

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Thermal conductivity detector

Flame ionization detector

Mass spectrometer

All above

Enfleurage process is used to extract the essential oils from

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Back of plant

Seeds of plant

Leaves of plant

Flowers of plant

Purpose of sizing is.

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To increase the strength

To improve formation

To increase resistance toward water

To remove wastes

Strongest inter molecular hydrogen bond is formed in

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H2O

NH3

HF

H2S

Fats and oil are_____________

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Acids

Alcohols

Salts

Base

The steroid which plays an important role in carbohydrate metabolism is.

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Oestrone

Progestrrone.

Androsterone

Cortisone

Pick out incorrect statement about K2Cr2O7

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It oxidizes acidified solution H2SO4 to S

It oxidizes KI to I2

It oxidizes HCl to Cl2

It gives oxygen, when treated with cold conc. H2SO4

Nitrobenzen can be prepared from benzene by using a mixture of conc. HNO3 and conc. H2SO4 In the nitrating mixture. HNO3 acts as a.

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Base

Acid

Oxidizing agent

Catalyst

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