Question # 1

Peppermint oil contains.

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Menthol

Thymol

a-pinene

Comphene

The exchange equilibrium in gas chromatography depends on.

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Solubility or absorbability of he sample

The polarity of he stationary phase and analyte

The degree of H bonding

All above factors

Which type of the solids are generally good conductors of electricty.

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Covalent

Ionic

Metallic

Molecular

The vapour pressure of a liquid

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Always increase's with temperature

Always decreases with temperature

Is independent of temperature

Increase up to the boiling point

Which of the following substance is not present in acid rain.

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Sulphuric acid

Nitric acid

Acetic acid

Sulphurous acid

Which of the following is not a pyrimidine base.

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Uracil

Thymine

Cytosine

Guanine

Which of the following statement is not correct with respect to hardness of water.

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It is due to soluble salts of Na

it is due to soluble salts of Ca

It is due to soluble salts of Mg

It is due to soluble salts of Fe

Which of the following is not strong electrolytes.

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HCl

H2SO4

HNO3

CH3COOH

Which one of the following ions is colourless.

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Cu+

Co2+

Ni2+

Fe3+

Which of the following elements has the highest third ionization energy.

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Sodium

Magnesium

Aluminum

Silicon

Which of the following interaction is the strong.

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Dipole -dipole

Ion induced dipole

Ion -dipole

Dipole induced diple

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

What is the lowest temperature diffusion hardening process and does not require a quench

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Carburizing

Tempering

Nitriding

Melting

Considering the elements B, Al, Mg and K , the correct order of their metallic character is.

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B > Al > Mg > K

Al > Mg > B > K

Mg > Al > K > B

K > Mg > Al > B

Concentration polarization arises because of the

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Different concentrations of solutions in the two half cells

Changes in the concentration of electrolyte around the electrode from bulk concentration

Reversible nature of the cell

Variation in temperature during measurements

In the extraction of iron, the furnace change consists of iron ore, coke and limestone. The function of limestone is to act as.

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An oxidizing agent

A reducing agent

Flux

Slag

The word 'ceramic' meant for.

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Soft material

Hard material

Burnt material

Dry material

Apoenzyme is

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Hydrolytic enzyme

Oxidative enzyme

Coenzyme

Protein part of enzyme after removal of coenzyme

The sample characteristics affecting the weight loss curve include.

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Amount of sample

Sample particle site

Heat of decomposition reactions

All

Which type of elements form ionic hydrides.

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Transitionelements

Metalloids

Elements with high electronegativity

Elements with high electropositivity.

Fluorine form Fluorides reacting with

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Metals

Non metals

Metalloide

Any of above

The relative error is usually expressed as

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Parts per ten

Parts per one

Parts per hundred

Botha C and D

Valence bond theory is also called as

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Electron pair theory

Band theory

Electron gas theory

Electron pool theory

In Dannis's method the end of the copper caps into which graphite electrode are fixed with cement.

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Portiant

Bakelite

Asbestos

All of above

The element Uuu has atomic numebr

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102

111

101

110

The sugar present in RNA is

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D- ribose

D-Arabinose

D-Glucose

Deoxyribose

Which of the following has the maximum tendency to form complexes.

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K

Na

Rb

Li

Which of following is used as make up chemical in Kraft process.

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Na2CO3

KCl

Na2SO4

NaOH

Which of the following statements is not related with joule Thomson effect.

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Joule Thomson is 0 isenthalpic in nature

H2 and He show heating effect

All gases show change in temperature

The change in temperature depends on initial temperature and nature of the gas.

Joule Thomson coefficient is defined as meo= (op/oT)H

The bond order gives the following valuable information.

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Stability of the molecules of ions

Bond dissociation energy and bond length

Magnetic properties

All of the above

Inductive effect can be used to explain

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Dipole moment of chemical bonds

Strength of acids

Strength of bases

All above

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