Question # 1

What refers to the tin mill steel, without a coating.

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White plate

Black plate

Tin steel free

Dichromate tin

The bond between two identical non metal atoms has a pair of electrons.

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Unequally shared between the two

Transferred fully from one atom to another

With identical spins

Equally shared between them

For a chemical reaction A ___________ produce, the rat of the reaction doubles when the concentration of A is increased by 4 times the order of the reaction is.

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0

1

1/2

4

Shows a regular increase on moving down the group form carbon to lead

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Atomic volume

Atomic radius

Density

All above

Which of the following property has a higher value for trans isomer as compared to cis isomer.

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Density

Dipole moment

Melting point

Boiling point

The angle of rotation in a polarimeter depends on.

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Nature of the compound

Nature of the solvent

Wavelength of the light used

All above factors.

The most common beta brase with a composition of 60 % copper and 40% zinc is called.

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Yellow brase

Red brase

Muntz metal

None of above

The process in which ore is heated generally in the absence of air, to expel water from a hydrated oxide at temperature below their melting points is called.

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calcination

Roasting

Froth floatation

Bessemerization

Trimethylamine is a weaker base than dimethylamine is explained by

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Steric effct

Resonance effect

Inductive effect

All above

What element constitutes the major component of most bronzes.

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Tin

Zinc

Carbon

Aluminum

Which of the following statements is not correct with respect to applications of Hammett equations.

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It develops a quantitative relationship between structure and reactivity

This equation on can be used to calculate the value of pK_a

This equation does not help to calculate the rate of some reactions

This equation has mechanistic implications

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 of the following anionic species is not separated by gravimetric analysis.

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Cl-

SO4

CH3COO-

PO4

Molecule of oxygen is

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Diamagnetic

Paramagnetic

Both A and B

None of above

Which of the following statement is not correct regarding the constant R . and in ideal gas equation PV= nRT

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Its value in independent of temperature

Its value is independent of pressure

In SI Units its value is 8.314 K^-1 mol^-1

It is called the universal gas constant per molecule.

SO3 exists in form

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a -so3

b-SO3

gama SO3

All above

The oxidation Number of I in HIO4 is.

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+6

+ 7

+ 3

+ 14

iodine is used as

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Tincture of iodine

Iodex and antiseptic

Treatment of goiter

All above

Nitrogen (N2)) is relatively unreactive because.

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Its electronegativity is high

Its dissociation energy is large

Its atomic radius is small

It is the first element of group 15

The pH of the tears is

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7.0

7.4

7.8

8.2

The element Uuu has atomic numebr

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102

111

101

110

Both the elements shows allotropy

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B & Ai

B & Si

Al & Si

Any of above

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

Stainless steel consists of which elements.

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Fe only

Cr only

Fe and Ni

Fe ,Ni and Cr

The property associated in thermometric tittration is

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Change in weight

Rate of change in weight

Heat evolved or absorbed

Change in temperature

The boiling point of water is unexpectedly high because.

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H2O molecule in linear

Sp3 hydrogen bonding is involved in the formation of water

There is hydrogen bonding and consequent association of H2O molecules.

Oxygen is the first member of the VI group

Cryolite is used in the electrolytic extraction of aluminium to.

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Obtain more aluminium

Reduce alumina

Protective electrodes

Dissolve bauxite and increase the electrical conductivity

Acute toxicity is expressed by the term

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LD50

IC50

I 1/2

Mean life

Ammonia when used directly as a fertilizer is to be injected about_____ under the surface to keep it from seeping out.

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2 inches

4 inches

6 inches

10 inches

Which of the following equations is the most general equation of state.

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Vander Waal's equation

Dielectric equation

Clasuaiua equation

Kamberling Onnes equation

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