Question # 1

Calcium cyanamide on treatment with steam under pressure gives NH3 and

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Calcium carbonate

Calcium hydroxide

Calcium oxide

Calcium bicarbonate

Coagulation of protein on treatment with heavy motal salts or heating is called.

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Decolorisation

Denaturation

^{Sedimentation process}

Reversible precipitation

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

Which of the following concentration term is used in respect of standard solutions.

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Normality

Formality

Molarity

All of above

Rutherford proposed the nuclear model of the atom to account for the result of experiments in which the alpha particles are scattered from metal foils.Which of the following statements in not related to Rutherford observation.

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An atom consists of central core or nucleus around which the protons exist.

The nucleus has most of the mass of the atom

the nucleus consists of protons and neutrons.

Each distinct atom has a specific number of protons.

The inert gasses AR, Ka, and Xe form solid compounds with certain organic molecules under pressure..

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Halides

Hydrates

Clathrates

All of above

Casionic polymerization is initiated by

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BF3

NaNH2

Bul

Both b and c

What ASTM test for shear strength is designated for plastics.

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D 732

D 790

D 695

D 638

The vibration degrees of freedom for a linear and non liner poly atomic molecule of seven atoms each an respectively

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30 and 29

30 and 32

28 and 29

None of above

Which of the following statement is not correct with respect to electrometric effect.

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It is permanent effect

It is brought into play instantaneously at the demand of attacking reagent

It proceeds a polar addition reaction

The original electronic condition is restored after the removal of tacking regent.

Which of the following halogen exist in solid state.

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F2

I2

Cl2

Br2

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.

Peeling of ozone umbrella is due to.

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CFCa

PAN

CO2

Coal burning

IUPAC name of HCONH2 is.

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Methanamide

Methanoylamine

Ammoethanal

Formanide

Which of the following disposal method is used for agriculture wastes.

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Dump

Landfill

Incineration

Open burning

All above

Metal crystallize is system having co ordination number

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8

12

14

any one of above

Electronegativity is given by

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Average of first and second ionization energies.

Average of first and second electron affinites

Average of ionization energy and electron affinity

None of the above

The pKa of acetic acid is 4.74 which implies that.

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pH of 1N solution is 4.74

At pH 4.74 the dissociation of acetic acid is maximum

At pH 4.74 half of the acetic acid molecules are dissociated in the solution.

At pH 4.74 the dissociation of acetic acid is minimum.

Which trihalide is not hydrolysed by water

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NF3

NCl3

PCl3

AsCl3

Which of the following method is used for the coventrating of ores.

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Gravity separation

Magnetic concentration

Fourth floatation

Electrostatic concentration

All

Complexing reactions are useful for which of the following method of analysis

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Gravimetry

Spectrophotometry

Interfering ions masking

All of the above

The most widely used method of extracting metal ions is the formation of a chelate molecule with an organic chelating agent The chelating agents are.

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Strong acids

Strong bases

Weak bases

Weak acids

Peppermint oil contains.

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Menthol

Thymol

a-pinene

Comphene

Helium contents in the atmosphere by volume.

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0.0005%

0.0015%

0.0001%

0.00001%

Helium is used for

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The preservation of food

Filling electrical transformer

Pressuring agent in rockets

All of above

Valence bond theory is also called as

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Electron pair theory

Band theory

Electron gas theory

Electron pool theory

The quantum yield of a Photo chemical reaction in

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Always less than unity

Always equal to unity

Always greater than unity

Can have any value > 0 depending on the reaction

Is an instate able colourles gas with a sticky sweet odor and is extremely toxic.

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B2 H6

B4 H10

B3 H9

B6 H10

Hydrolith is the common name of

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NaH

CaH2

NaF

CaF2

Which of the following steps is not involved in chemical analysis.

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Separation of sample in pure form

Separation of the sample in the mixture form

Preparation of sample for the analyisis

Validity of experimental results

In C4-axis of rotation, an object in rotated through an angle of.

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120^o

180^o

100 ^o

90^o

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