Question # 1

The plate height is the length of the column divide by

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Length of the column

Width of the column

Number of theoretical plates

Number of components of the mixture.

A colorless gas with pleasant odour and sweet taste.

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N2O

N2O3

NO

N2O4

Which of the following phenomena is not explained by the classical mechanics.

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Black body radiation

Photoelectric effect

Atomic and molecular spectra

Heat capacities of solids

All of the above

A trend which is common to elements of both the group IA and group VII A ongoing from top to bottom.

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Boiling point increases

Electron affinity increases

Oxidizing power increases

Ionization energy decrease

Which of the following statements is not true about potash alum.

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Its empirical formula is KAI (SO4)2 12H2O

Its aqueous solution is basic in nature

It is used in dyeing industry

On heating it melts in its water of crystallization

A major constituent of materials one whose amount in the materials is

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1% or more

0.1%

0.01%

0.001 %

Which of the following properties of a system does not change in a state of equilibrium.

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Density

Pressure

Colour

All above properties

Which of the following salt is green in colour

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Mn salt

Cr salt

Co salt

Ba salt

Which among the following is insoluble in water.

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LiOH

KOH

NaOH

RbOH

Beside the common silica based SPE particles, polymer supports are also available They have advantages over silica based SPE particles, Which of the following reason is possible.

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These are stable over a wide pH range.

These do not possesses residual silica groups

These are designed to be wettable and have high capacity than silica base particles.

All above

The solution of NaOH pH -10.46 contain [OH-]

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2.0 X. 10^-4

4.6 X 10^-4

4.6 X 10^-2

4.6 X 10^-3

The concept is also known as electron pair donor acceptor system.

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Bronsted Lowery

Lewis

Lux -Flood

Usanovich

Sodium metal cannot be stored under

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Hexane

Benzene

Kerosene

Ethanol

Atomicity of which of the following pair of elements is not same as hydrogen.

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Phosphorus, Nitrogen

Nitrogen, Argon

Nitrogen, iodine

Iodine, sulphur

Which of the following contains isoprene unite.

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Natural rubber

Nylong -6,6

Polyethylene

Decron

Electronegativity of oxygen is.

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2,5

3,5

2,4

2.1

Which of the following state is not correct regarding Langmunir adsorption theory.

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Adsorbent has specific equivalent sites

One site can adsorbs only one molecule

Adsorbed molecules cannot interact with each other

Adsorption is a static process

The degree of dissociation of weak acid increases with.

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Decreasing pressure

Increasing pressure

Increasing concentration

Decreasing concentration

When of the following steps is involved in structure determination of an organic compound.

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Purification of compund.

Qualitative and quantitative analysis of elements present

Determination of molar mass

All above steps

When some quantity of electricity is passed though two electrolytic cells. The ratio of the mass of the products obtained at the cathode is the same as the ratio of their

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Densities

Atomic masses

Equivalent masses

Atomic numbers

Which of the following radical is not a member of III group

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Al³⁺

Fe²⁺

Ca²⁺

Fe³⁺

Which of the following compounds has highest dipole moment.

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Dichloromethane

Chloroform

Chloromathane

All above

Which isotope of hydrogen is radioactive in nature.

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Protium and deuterium

Tritium only

Tritium and deuterium

Only deuterium

Consider the coordination compound Na2[Pt(CN)4] the Lewis and is

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[Pr(CN)4]2

Na+

Pt

Pt2+

The electrolytic method super passes all other methods due to.

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Furity

Cheapness

Easy available

All above

A colloidal system in which a liquid is dispersed in a solid is called a/an

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Emulsion

Sol

Gel

Precipitate

Which of the following electrode is normally used as reference electrode for a potentiometer.

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Platinum electrode

Calomel electrrode

Silver electrode

Copper electrode

Sanger's reagent is

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Carbobenzyloxy chlride

Dimethyl amino sulphonyl chloride

I-Fluoro -2,4-dinitrobnzene

2,4- Dinitrophenyl hydrazine

In a period, the element with biggest electron affinity belong to.

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Group 1

Group 2

Group 17

Group 18

Which of the following does not apply to metallic bond.

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Overlapping valence orbitals

Mobile valency electron

Delocalized electrons

Highly directed bonds

Among alkali metals, the least metallic element is.

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Li

Na

Rb

Cs

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