Question # 1

Monomer of neoprene rubber to

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1-chloro 1,3- butadiene

2- chlro, 1,3-butadiene

2-Bromo -1,3- butadiene

2-Methyl 1,3-butadiene

The Lewis formula of SOCl2, the total number of bond pairs and lone pairs of electron around sulphur are.

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2 ,1

2,2

3,1

3,0

Of the molecules, SF4 Xe F4 and CF4 which have square planar geometry.

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SF4 , Xe f4 and CF4

SF4 only

CF4 only

XeF4 only

Which of the following compounds is must acdic.

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H2O

H2S

H2Se

H2Te

Which of the following reaction cannot be used for the synthesis of a amino acids.

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Gabriel phthalimide

Streckers synthesis

Sorensen synthesis

Schmidt synthesis

Which of the following technique is the application of voltammetry at a fixed potential to detect changes int he currents as a function of the concentrating of the analyte

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Amperometry

Coulometry

Polarography

Potentiomertry

Which of the following statement is not related with the advantages of TLC.

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A variety of adsorbents can be used

The thickness of adsorbent can be varied

Fluorescence can be introduced

Different detectors can be used

Copper is mainly extracted from witch of the following ore

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Sulphide ores

Carbonate ores

Oxides ores

Non sulphide ores

Coordination compound show

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Structural isomerism

Stereo isomerism

Both A and B

None of above

Which of the following orbitals does not make sense.

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6f

4f

7s

2d

Example of intra molecular hydrogen bonding.

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O-nitrophenol

O-hydroxy benzaldehyde

O- hydroxy benzoic acid

All of the above

Lithum silicide reacts with concentrated hydrochlric acid to give lithium chlride along with.

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H2 and SI

Si H 4 gas

Disilane gas

Si3H8

The volume of a given mass of gas at constant temperature varies inversely with the pressure. This is a statement of.

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Charlea's law

Avogadro's law

Boyle's law

Dalton 's law

Among sodium phosphate, sodium sulphate and sodium chloride the solubility in water increases as.

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Chloride > Phosphate > Sulphate

Sulphate > Pohosphate> Chloride

Chloride > Sulphate > Phosphate

Phosphate > Chloride > Sulphate

The normality of 2.3 M H2SO4 solution is.

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0.46 N

0.23 N

2.3 N

4.6 N

What type of inter molecular force present in nylon-66^o

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Vander wall

Hydrogen bond

Dipole -dipole interactions

Sulphide linkage

Black and white photographic film contain small grains of.

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Silver bromide

Silver cholride

Silver iodide

Any of above

Hydrolith is the common name of

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NaH

CaH2

NaF

CaF2

An impure sample of camphor contaminated with sand, can be purified by

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Distillation

Sublimation

Steam distillation

None of the above

Which metal can produce dihydrogen gas by reaction with dil H2SO4

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Ag

Fe

Cu

Pt

Metallic bond is treated essentially as in character

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Ionic

Covalent

Polar

Non polar

The compound insoluble in acetic acid is.

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Calcium oxide

Calcium carbonate

Calcium oxalate

Calcium hydroxide

The term accuracy refers to how near the observed value is to.

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Mean value

Low value

True value

Standard value

Both C and D

Which of the following techniques involve gas as the mobile phase.

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HPLC

GLC

TLC

Paper chromatography

The width of a typical DNA molecule is _______nm

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1

2

5

10

Which of the following does not form stable diatomic molecule.

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Nitrogen

Phosphorus

Hydrogen

Oxygen

Has the highest value of electronegativity

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F

Cl

Br

I

The overall energy change during the Cannot cycle to.

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Equal to zero

Equal to Q

Equal to W

Maximum

Which of the following has the highest lattice energy

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LiCl

NaCl

KCl

CaCl

Amorphous boron on burning in air form

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B(OH)3

Only B2O3

Only BN

Mixture of B2O3 and BN

Consider the coordination compound K2[Cu(CN)4] A coordinate covalent bond exists between

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K+ and CN-

Cu2+ and CN-

K_ and [Cu(CN)4]2+

C and N in Cn

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