Question # 1

In emulsions , the dispersed phase and the dispersion medium are.

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Both solids

Both liquids

Both gases

Phase is liquid and medium is solid.

The pKa of an acid having ionization constant 1 x 10^-5 is

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-5

5

9

-9

Which of the following is not a naturally occurring dye.

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Indogo

Indigotin

Alizarin

Malachite green

The percentage of nitrogen in urea is.

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36%

46%

55%

65%

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

Hypo is used in photography to.

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Reduce AgBr to metallic silver

Remove silver a silver salt

Remove undecomposed silver bromide as soluble complex

Remove reduced silver

Complexing reactions are useful for which of the following method of analysis

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Gravimetry

Spectrophotometry

Interfering ions masking

All of the above

Which of the following makes the motion of perpetual motion machine a physical impossibility.

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First law of thermodynamics

Second law of thermodynamics

Third law of thermodynamics

The Boltzmann law

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

Ionic reactions mainly take place in.

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Aqueous solutions and organic solvents of high polarity

Non aqueous solvents of low polarity

Gaseous state

Solid state

A compound with an congruent melting point decomposes on heating into.

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A liquid of the same composition as the solid

A new solid phase and a solution with a compositional from that of the solid phase

A new solid phase and a solution with the same composition as that of the solid phase

A solution of fixed composition

Copper is resistant to

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Air

Water

Acid and Alkali

All of the above

To increase the life of filament and to low the heat conductivity a mixture in filled in electric bulb.

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Ar & N2

Ar & Kr

Kr & N2

Xe & N2

The plate height is the length of the column divide by

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Length of the column

Width of the column

Number of theoretical plates

Number of components of the mixture.

Both the elements are typical non metals.

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B & Ai

B & Si

Al & Si

Any of above

Pick out the incorrect statement for CIF3

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It has trigonal planar geometry

It is used to make gaseous UF6 which is useful in making enriched U-235 fuel

It is used as powerful fluorinating agent for inorganic compounds

CIF2 has been used as fuel in short range rockets reating with hydrazine.

Which of the following factors does not effect the rate of the reaction.

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Pressure

Temperature

Concentration

Catalyst

All of the above

Which of the following colligative properties can be used to characterize colloidal particles.

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Lowering in vapour pressure

Elevation in boiling point

Depression in freezing point

Osmotic pressure

pH of pure water at 25 ^oC. kw = 1 x 10^-4

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0

7

14

None of above

Which of the following solution has pH= 11?

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1 X 10^-11 m NaOH

1 x 10^-11 m HCl

1 x 10^-3 M NaOH

1 X 10 ³ M NaOH

Electronegativity is given by

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Average of first and second ionization energies.

Average of first and second electron affinites

Average of ionization energy and electron affinity

None of the above

In an adiabatic system, if work in done, the temperature must.

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Increase

Decrease

Remain the same

Increase than decrease

Gold dissolves in aqua regia forming

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AuCl

Au(NO3)3

AuCl3

HAuCl4

Enzymes are

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Complex non living compunds

Laving organisms

Complex protein molecules

Bacterial colonies

Air pollution is not caused by

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Pollen grains

Hydroelectric power

Industries

automobiles

Which of the following is an allotrops of hydrogen.

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0- H2

P-H2

Both A and B

None of these

The osmotic pressure of a solution with definite composition.

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Varies directly as the volume and temperature.

Various inversely as the temperature.

Varies inversely as the volume and directly as the temperature.

None of the above

Argillaceous material does not include.

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Vlay

Marine shells

Slate

Blast furnace slag

The number used in cancer therapy is.

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Fe

Co

Ni

Rn

Which of the following is an azo dye.

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Congo red

Rhodamine B

Ertythroein

Paraosaniline

Which of the following system has low as well as upper consolute temperature.

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Nicotine - water

Aniline -water

Triethlylamine -water

Phenol -water

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