Question # 1

The law of trinds was proposed by

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Dobereiner

Newlands

Lother Mayer

Chancourtois

Hemimorphite is an example of.

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Orthosilicate

Pyrosilicate

Cyclic silicate

Meta silicate

Most electronegative element is.

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C

Si

Pb

Sn

A molecule returns from the excited singlet state to the ground singlet state with emission of light This process is known as

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Fluorescene

Scattering

Phosphorescence

Chemiluminescence

Which of the following substance is not weak electrolyte.

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CH3COOH

NH4OH

Oxalic Acid

NaCl

Which of the following technique in current voltage technique

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Amperometry

Voltammetry

Poteatiomertry

Polarography

Glycerol on dehyeration gives

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Allyl alcohol

Aerolein

CHOH = C= CHOH

-CHO -CHOH -CH2OH

Which of the following statement is not correct with respect to group theory.

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Two elements of a group combine to form a third element of a group

An element combines with itself to form another element of the group.

Each element of the group obey associative law of combination

Each group element has no reciprocal

Which configuration has lowest potential energy.

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Eclipsed

Staggered

Skew

All have same energy

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 is not an alum.

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KAI (SO4)3 12 H2O

NaAI (SO4)2 12 H2O

NH4Fe (SO4)2 12H2O

FeAl (SO4)2 . 12 H2O

Which of the following elements is most electropositive.

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C

N

O

Be

Which of the following in not a characteristics of crystalline solids.

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Sharp melting point

Isotropic

Long range orderly arrangemnt

None of above

Which of the following metals is the most abundant in the earth's crust.

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Mg

Ca

K

Na

In the electronic structure of acetic acid,the total number of shared and unshaped pair of electrons are respectively.

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16 ,8

8 ,4

12 ,8

8 ,12

Which of the following gas form weakly acidic sulphurous acid

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SO2

SO3

NO2

NO

Thermogravimetic analysis has application is which of the following fields

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Gravimetric analysis

Discovery of new methods ofseparation

Determination of purity and thermal stability

All above

The correct order of reactivity among I , Ii, and III IS.

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i > ii >iii

i > iii > ii

II > III > I

III > II > I

Which of the following statement is not correct with respect to hydrolytic cycle.

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Water covers about 83% of the earth's surface

Water covers about 73% of the ear5th's surface.

It is the major constituent of the lithosphere

it is essential requirement of all the organisms

Which of the following statements is incorrect.

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The elements of group 18 are known as aerogens.

Group 2 elements are all metals

Metallic character increase on going down a group

All the elements belonging to a particular period have same valence shell configuration.

The branch of chemistry which deals with the rate of reaction as well as mechanism is known as

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Wave mechanism

Classical thermodynamcis

Chemical kinetics

Phtochemistry

The three isotopes of hydrogen differ from one another in

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Atomic number

Number of protons

Nuclear charge

Nuclear mass

The physical methods of nano roads syntheses involves.

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Top down approach

Bottom up approach

Left right approach

Right left approach

Which of the following regions of the spectrum would be used to determine the structure of the crystalline solids.

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Microwave

X-rays

Visible

Infrared

Ammonium nitrate is sold as a mixture with

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Soda Ash

Lime stone

Zinc

None of above

Which of the following is not true as compared with alkaline earth metals.

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Alkali metals are more reactive

Alkali metals have lower density

Alkali metals are more electro positiveness

Alkali metals have stronger metallic bonds

The greater stability of bonzyl carbonium ion as compared to t-butyl carbonium ion is due to.

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Inductive effect

Resonance effect

Electrometric effect

All above

The alkali metal that react with nitrogen directly to form nitrides.

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Na

K

Rb

Li

The structure of SO2 is

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Linear

Angular

V-shaped

Planner

Enzymatic action is heat at a fixed

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Temparature

pH

Both of these

None of these

Which of the following substance has been advocated as fuel of future.

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O2

N2

H2

H2O

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