Question # 1

In the process of preparation of detergents the organic acids produced are neutralized with.

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Sodium hydroxide

Sodium sulphate

Sodium chloride

Potassium hydroxide

Titanium dioxide shows the lattice strcuture.

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Flluorite

Rutile

Wurtzite

Zeolite

Which of the following statements is not true with respect to atomic spectroscopy.

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Atoms are simplest form of matter

Atoms cannot rotate or vibrate as molecules do

Only electronic transitions within atoms take place

Band spectra are observed

Which of the following has the maximum ionic character.

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HF

HCl

HI

HBr

The most promising technique for solar production of electricity is.

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Dry cell

Battery

Solar cell

None of above

Which of the following statements not correct with the concept of Bronsted concept of acids and bases.

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An acid can donate a proton

A base can accept a proton

This concept has many bases that have OH- ions

This concept is more general

Chemical and physical properties of metal nano particles of atoms were observed to change periodically depending upon

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Number of atoms in a particle

Shape of particle

type of organization

All of the above

Which of the following is not a characteristics of terponoids.

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They are pleasant smelling liquids

They are steam volatile

They are nitrogenous bases

They are insoluble in water

Halogens are coloured because.

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They are strong oxidant

Their molecules are held together by weak van der Waals forces

Their atoms absorb radiations form visible range causing the excitation of valence electrons to higher energy of levels

Their molecules absorb light radiation forming the oxcited state.

Ammonium nitrate is sold as a mixture with

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Soda Ash

Lime stone

Zinc

None of above

Which one of following is non polar

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CH2Cl2

CCl4

CHCl3

CH3Cl

The percentage of nitrogen in urea is.

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36%

46%

55%

65%

Which of the following process is not sorbent separation technolgy.

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Penex

Parex

Molex

Olex

Which of the following statements is not correct with respect to errors in flame photometry.

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Errors rising form the phenomena developed in the Hollow cathode lamp

Background effect

Errors arising from test element itself

Spectral interference

The sum of pH and pOH is aqueous solution is equal to.

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14

7

zero

pKw

Bromine is soluble in

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Alcohol

Water

Chloroform

All above

Which of the following substance is not weak electrolyte.

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CH3COOH

NH4OH

Oxalic Acid

NaCl

What is the oxidation number of the central meal atom in the coordination compound.[Pt(NH#)#Cl]Cl

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-1

0

+2

+3

When a drop of detergent solution is added onto a clean towel. It spreads instead of existing as a droplet Which of the following statements explains this phenomenon.

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Detergent acts as an emulsifying agent

Detergent reduce surface tension of water

Detergent reduces surface tension of water

All of above

Which of the following is a non degradable pollutant.

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Long chain phenoiics

DDT

Mercuric salts

All above

Which of the following hydroxides has the maximum solubility in water.

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Mg (OH)2

Ca (OH)2

Sr (OH)2

Ba (OH)2

Which of the following is not a pyrimidine base.

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Uracil

Thymine

Cytosine

Guanine

Carbon in wrought iron is present as

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Silicon carbide

Iron carbide or comentite

Graphite

Partly as iron carbide and partly as graphite

Which of the following technique is used to separate substance of high molecular weight of different charges.

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Dialysis

Electrophoresis

Solvent

None of the abvoe

Which of the following is not known.

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KrF6

XeF6

XeO3

KrF2

What is clinker.

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Roasted calcareous material

Roasted argillaceous material

Roasted calcareous and argillaceous material

Roasted gypsum

Which of the following statement is incorrect.

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An alloy is a mixture of two or more metals

An alloy is a mixture of two or more metal and non metal elements that have metallic properties

An alloy has a fixed composition

An amalgam is an alloy containing Hg

Which of the following functional groups is not involved in ion exchange chromatography.

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Weak acids

Strong acids

Strong bases

Carbohydrates

Alumina is not used as

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Refractory material

A medium in chromatography

An abrasive

A White pigment

Example of inter molecular H-bonding is

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NH3 and H2O

HF

CH3COOH

All of abvoe

The correct order of thermal stabilities of hydriedes of group 15 is.

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NH3 > PH3 > AsH3 > BiH3> SbH3

NH3 > PH3 >AsH3 > SbH3> BiH3

NH3 < PH3 < SbH3 > AsH3 > BiH3

BiH3 > Sb H3 > AsH3 > PH3 > NH3

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