Question # 1

Which trihalide is not hydrolysed by water

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NF3

NCl3

PCl3

AsCl3

The agricultural field that produces maximum methane gas into atmosphere is

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Wheat field

Paddy field

Cotton field

Groundnut field

The alkaline hydrolysis of fat is know as

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Condensation

Esterification

Saponification

Emulsification

The change of chemical potential of any component with temperature an constant P and composition, is euqal to.

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Partial molar enthalpy of that component

Partial molar volume

Partial molar free energy

Negative of the partial molar entropy

Environmental pollution refers to.

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Peeling of top soil

Dissipation of energy

Release of toxic materials in environment

None of the above

When two H atoms approach each other then forces operates.

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Attractive forces

Repulaive forces

Attractive and repulsive

None of above

Which of the following elements with excess oxygen to form proxides.

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Ca

Mg

Li

Ba

The halide which is inert to water is

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PCl5

SiCl4

BCl3

SF3

'A line, a point or a plane about which a symmetry operation is performed, is known as.

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Symmetry operation

Symmetry element

Reflection

Inversion

Which of the following have +3 oxidation states.

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B & AI

In & TI

B & In

AI & TI

The angle between corresponding planes forming the external surfaces of the crystal remains constant for a given substances This is known as.

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Steno's law

Henry's law

Bragg law

Pascal law

Among the elements of second period the element with highest melting point belongs to group.

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1

14

17

18

Which of the following oxide formed in appreciable quantity in the atmosphere.

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NO

NO2

N2O

All above

The tyndall effect was used by Zsigmondy to device.

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The ultramicroscope

The ultracentrifuge

The osmometer

Electrodialysis

The reduction in ozone layer would lead to

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Temperature chages

Rainfall failure

Increase uv radiation on earth

All above

Which of the following has the highest lattice energy

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LiCl

NaCl

KCl

CaCl

The cooling of molten urea by air in the tower is called.

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Prilling

Evaporation

Condensation

Distillation

For each value of l. the number of m velocity are.

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n²

2l

(2l+1)

(n+1)

Which of the following radical is not a member of III group

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Al³⁺

Fe²⁺

Ca²⁺

Fe³⁺

Heisenberg's uncertainty principle precludes the exact simultaneous measurement of.

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Velocity and energy

Velocity and time

Charge density and probability

Position and momentum

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

Which one of the following statements if false with respect to CFT.

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In an octahederal crystal field. the d electron on a metal ion occupy the ex of orbitals before they occupy the t98 not of orbitals.

Diamagnetic metal ions cannot have an odd number of electrons

Low spin complexes can be paramagnetic

Low spin complexes contain strong field ligands.

Permanent hardness of water is due to.

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Sulphate of Ca

Chloride of Ca

Sulphate of Mg

All above

An emulsifier is an agents which

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Stabilizes an emulsion

Homgeneises and emulsion

Causes coagulation of an emulsion

Helps in the formation of an emulsion

The increasing order of energies of various sub shells is

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1s < 2s<3s<2p<3p<4s<3d

1s <2s<2p<3s<3p<4s<3d

1s>2s>2p>3s>3p>4s>3d

1s>2s>2p>3p>3d>4s

Electron gas theory fails to explain

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Specific heat of metals

Electrical and thermal conductivity

Paramagnetic behavior of metals

All of the above

For covalent bond to form between two atoms A and B

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Transference of electrons must take place from A to B

A pair of electrons of A is shared by both A and B

A and B contribute equal no. of electrons for mutual sharing by A and B

One of the atom A or B must already have octet of electrons.

When a solute is dissolved in two immiscible solvents it will distributes itself between two phases and the ratio of the concentration of the solute in two phases will be constant, This is known as.

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Starke law

Distribution law

Equilibrium law

Snell's law

Berllium has diagonal relationship with

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Li

Al

B

Na

The oxidation Number of I in HIO4 is.

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+6

+ 7

+ 3

+ 14

Used in producing intense light in cinematography

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Xenon

Krypton

Radon

Helium

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