Question # 1

Among the following statements in the nitration of aromatic compounds, the false one is.

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The rate of nitration of benzene is almost the same as that of hexadeutero benzene

The rate of nitration of toluene is greater than that of benzene

The rate of nitrationof benzen is greater than that of hexadeutero benzene.

Nitration in an electrophite substitution reaction.

Gold dissolves in aqua regia forming

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AuCl

Au(NO3)3

AuCl3

HAuCl4

Which sequence of steps is correct in paper making machine

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Pressing Dyring, Flow spreader Calender stock

Flow spreader, Pressing, Prying Calender sock

Drying ,Pressing , Flow spreader, Calender stock

None of above

Example of linear geometry

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XeF2

F2 and HgCl2

CdI2 AND Ag Cl3

All of the above

Bromine is used as

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Fungicides

Herbicides

Germicides

Insecticides

Bitumen is used in

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Electric generators

Road surfacing

Coal tar

All of above

According to CFT the metal ligand bond is considered to be ionic to presentage.

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100%

90%

50%

70%

Which of the following is not a redox indicator.

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Ferroin

Diphaylamine

Phenolphthalein

Methyl blue

Nitric acid has the property

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Nitrating

Reducing

Redoxing

None of above

The different layers in graphite are held together by

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Ionic bonding

Metallic bonding

Covalent bonding

Van der Waals forces

What is the effect of manganese in cast iron.

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^{To affect the machinability ductility and shrinkage depending on form}

To reduce hardness by combining with sulfur below 0.5% and increase hardness above 0.55

To dioxide molten cast iron

Have no effect

Which of the following is not an acid radical

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Cl-

Br-

K+

I-

Which of the following test is not shown by proteins.

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Xanthoproten test

Ninhydrin test

Hopkin cole test

Muliken Barker test

The bromine produced on commercial scale may contain impurities of.

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Water

Chloride

iodine

All above

One arm of each t-RNA terminates in the base sequence.

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UGU

GGC

ACT

CCA

Inert pair effect is that

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When an element shows incertness in chemical combination

When higher oxidation state is more stable than lower oxidation state

When an elecrron pair is present on the atom of an element

When two s -electrons or outermost shell remain paired and do not participate in bonding.

The formula of sulphur sesquioxide

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SO4

S2O7

S2O3

SO3

The halide which is inert to water is

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PCl5

SiCl4

BCl3

SF3

SO2 acts as

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Lewis base

Lewis acid

Botha A and B

None of above

Pick out the incorrect statement regarding ozone.

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O3 is an unstbale dark blue diamagnetic gas

The central oxygen in O3 is sp3 hybridized

It cause the tailing of mercury

It does not react with KOH

Which of the following substance is not weak electrolyte.

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CH3COOH

NH4OH

Oxalic Acid

NaCl

Which of the following has the highest melting point.

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NaCl

KCl

MgO

BaO

The common ligands can be arranged in order of their increasing splitting power to cause d-orbitals splitting. This series is called as.

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Electro-chemical

Spectro -chemical

Physico-chemical

Spectro -electrical

Which of the following group reagent is used for III group of basic radical.

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Dilute HCl

H2S + HCl

NH4OH + NH4Cl

NH4OH + H2S

The light absorbed in UV and visible region causes.

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Vibrational energy changes

Rotational energy changes

Electronic excitation

All of these

The alternate feasible fuel for existence of mankind to

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Uranium

Wood

Bontonite

Cloth residues

The product obtained on heating n-heptane with Cr2O3 ____Al2O3 at 600 ^oC is.

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Cycloheptane

Methyl cyclohexane

Benzene

Teluene

Which of the following statement is not correct with respect to harmful effects of ground water pollution.

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It causes lungs cancer

It causes jaundice

It damages crops

It helps to prevent epidermises

Washing soap can be prepared by saponification with alkali of _____ of the following oil.

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Rose oil

Paraffin oil

Groundnut oil

Coconut oil

In their ionic compounds halogens exhinit the oxidation states of.

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-1

-2

-3

-4

The action of all the relations of all the organism to their environment is called

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Biology

Botany

Ecology

Archiology

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