Question # 1

Which of the following technique is most sanative one.

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Photomerty

AAS

Flame photometry

Flourimetry

Stable metal ions strictures are.

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Noble gas structure

Is electron group structure

Transition metal in structure

All of the above

What typical penetrator is used in Brinell hardness test

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10 mm ball

1.6 mm diameter ball

20^o needle

None of these

A 10% solution of sucrose contains 10 g of sucrose in how much volume of the solution.

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10 mL

100 mL

1000 mL

1 mL

In graph of atomic volume versus atomic weight the elements corresponding to peaks in the curve belong to.

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Group 1

Group 18

Group 4

Group 14

The common oxidation state of elements of group V A is.

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-3

+3

+5

Any above

The blue colour of CuSO4 disappears on adding Zn granules to it . it is because of .

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Oxidation of Cu atom

Oxidation of Zn²⁺

Oxidation Cu²⁺

Oxidation of Zn²⁺

The variation of enthalpy of reaction with temperature is given by.

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Hesse's law

Clasisus Clapayron equation

Kirchoffs equation

Arrhenious equation.

The size of quantum dot is ________________m

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5

5 x 10^-9

5 x10^-10

5 x10^-11

Which of the following acid radical give organic layer test.

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Cl-

CO3

I

S^2-

The oxidation state shown by phosphorus is.

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- 3

+ 3

+ 3 and +5

-3 ,+ 3 and +5

The rising world temperature will have serious effect on.

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Agriculture

Animal production

Human being

All above

Which of the following statement is not related with direct use of solar energy.

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It is used for space heating of buildings

It can be used to produce electrical power using photovoltaic cells

It can be used to produce hydrogen gas

It can be used start motor vehicle

An induction of dipole or polarity in non polar bond, and consequent electron shifting along a chain of atoms is known as.

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Inductive effect

Resonance effect

Hyper conjugation

None of the above

At the some temperature 0.1 M solution of urea is isotonic with.

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0.1 M glucose solution

0.1 M NaCl solution

0.1 M urea solution

0.1 M BaCl2 solution

Most effective pesticide is

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Carbonates

Organophosphates

Organ chlorines

All of these

Which of the following is the strongest oxidant.

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F2

Cl2

br2

I2

Which of the following represent the fuming sulphuric acid

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H2S2O4

H2S2O3

H2S2O6

H2S2O7

Which of the following statement is related with CO.

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It is a colorless and tasteless gas

It has less affinity to words hemoglobin

It has a boiling point of -192 ^oC

It is a dangerous asphyxiant

In diborane (B2H6)

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The structure is similar to that of C2H6

All the atoms are in one plane

The born atoms are linked through hydrogen bridges

There is a direct boron boron bond

The electrolysis of molten metal hydride will produce dihydrogen gas.

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At cathode

At anode

At both the electrodes

At none of the electrodes

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

Which of the following is not a polysaccharide

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Cellobiose

Cellulose

Insulin

Amylase

If reaction A has an activation energy of 250 kj and reaction activation energy of 100 kj, which of the following statements must be correct.

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If reaction A is exothermic and reaction B is endothermic then reaction A is favored kinetically

At the same temperature the rate of reaction B is greater than the rate of reaction A

The energy of reaction A must be greater than the energy of reaction B.

The energy of reaction B must be greater than the energy of reaction A

The geometry of Xe F2 is

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Triangular planar

Square planar

Linear

Trigonal bipyramidal

Which of the following contains both covalent and ionic bond.

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CCl4

NH4Cl

CaCl2

H2O

Which of the following methods is chemical in nature.

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Acid bas titration

Redox titration

Complexometric titration

All above methods

CFSE for d⁷ ion is.

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0.8

-0.8

-1.8

1.8

Among the solvents given below, with dielectric constant (E) given in parentheses which has highest solubility of KCI?

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Benzene (E=O)

Carbon disulphide (E = O)

Methanol (E =32)

Acetone (E = 2)

When HCl is titrated against NaOH , the pH at the equivalence point is.

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zero

> 7

< 7

14

In radial direction the thermal conductivity of a nano tube is ______ watt/(m.k)

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3500

385

0

350

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