Question # 1

The value of Kw increase with temperature because the ionization of water.

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Positive

Negative

Endothermic

Exothermic

Which of the following salt is water insoluble.

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K2SO4

Na2SO4

BaSO4

None of abvoe

The ration of thermal conductivity of silver to that of a carbon nanotube is.

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100 : 1

1 :100

10:1

1:10

Which of the following alloys contains Cu and Zn

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Bronze

Brass

Gun metal

Type metal

Which among the following is insoluble in water.

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LiOH

KOH

NaOH

RbOH

The wire of flash bulb is made up of.

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Cu

Ag

Mg

Ba

According to SHAB, Lewis acid are divided into.

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Two classes

Three classes

Four classes

None of above

Which of the following is not an adsorption indicator.

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Eosin

Bromocrsol green

Fluorescein

Phenolphthalein

Which of the following health effect is caused by cadmium.

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Hypertension

Cardiovascular problem

Kidney damage

All above

Which of the following hydroxide is getatinous in nature.

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Fe(OH)3

Al(OH)3

Ca(OH)3

Cr (OH)3

The process of removing disolved impurities from a colloidal system, by means of diffusion through a suitable membrane under the influence of an electric field , is called.

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Electrosmosis

Electrodialysis

Electrophoresis

Peptization

Diamond and carbon are the _________ forms of carbon

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Isotropic

amorphous

Allotropic

Isomeric

Which of the following generally increases on going from top to bottom in a group.

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Metallic charcter

Electronegativity

Oxidising behaviour

Raducing behaviour

When two atoms of hydrogen combine to form a molecule of hydrogen gas the energy of the molecule.

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higher than that of the separate atoms

Equal to that of the separate atoms

Lower than that of the separate atoms

Sometimes lower and sometime higher.

Greeks and Romans had used nanoparticles in the manufacture of.

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Cosmetics for eyes

Medicines

Metals

Hair -dye

Co enzyme cna be separated from enzyme by

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Precipitation

Dalysis

Hydrolysis

Distillation

Which of the following gas does not exist free on earth.

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N2

H2

O2

CH4

Pick out incorrect statement about K2Cr2O7

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It oxidizes acidified solution H2SO4 to S

It oxidizes KI to I2

It oxidizes HCl to Cl2

It gives oxygen, when treated with cold conc. H2SO4

Which of the following is component of the ecosystem.

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Inorganic substances

ORGANIC Substances

Animal and plants only

All above

Which of the following elements has the highest value of IE.

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Na

K

Mg

Ca

For which of the following compounds is the rate of hydrolysis by aqueous alkali most likely to be independent of the hydroxide ion concentration.

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1-Chlorobutane

2- Bromobutane

1- Iodobutane

2- Bromo -2- methyl butane

The diameter of hydrogen atom is.______________nm

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10

1

0.1

0.01

The first noble gas compound was

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XeO3

XeF4

XeF6

Xe +[PtF6]

Which of the following is not biological characteristics of water.

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COD

Animals

Plants

Viruses

Alkyl cyanide and alkyl isocyanides are

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Tautomers

Metamers

Functional isomers

None of the above

Red brass contain about how many percent of zinc.

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20 %

15 %

30 %

25 %

The magnetic quantum number (m) specifies the individual orbital in a Sub shell for a given l, m can be.

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l,l- l........-1

l........2, l -3.......-2l

l-l-2,..........-l

l-2,l-4, ............-4l

Setting of plaster of Paris volves.

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Oxidation with atmospheric oxygen

Combination with atmosphere CO2

Dehydration

Hydration to yield another hydrate

Which of the following techniques does not belong to column chromatographyy

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TLC

HPLC

Electrophoresis

Ion exchange

The oxidation number Xe in XeOF2 is

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0

+2

+4

+3

Un-like s -block elements d-block elements form which compounds as well

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ionic compounds

Co valent compound

Co ordinate compounds

None of above

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