Question # 1

Which of the following has highest dipole moment?

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NH₃

PH₃

AsH₃

SbH₃

Which of the following with aqueous KOH will give acetaldehyde?

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1, 2-Dichloroethane

1,1-Dichloroethane

Chloracetic acid

Ethyl chloride

In the reaction of oxalic acid with KMnO₄and H₂SO₄is slow at the beginning but after sometimes the reaction becomes faster due to

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Formation of MnSO₄which acts as 'Auto catalyst

Formation of CO₂which acts as 'Auto catalyst

Formation of K₂SO₄which acts as 'Auto catalyst

Evolution of O₂gas which acts as 'Auto catalyst

C₆H₁₂O₆ is molecualr formula of:

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Glucose

Dextrose

Fructose

All of these

The colour of transition metal complexes is due to:

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d-d transitions of electorns

Paramagnetic nature of transition

Ionization

Loss of s-electrons

Surfactants are organic compounds, used in detergents which reduce the

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Viscosity of water

Surface tension of water

Boiling point of water

Wetting ability of water

An electrochemical cell is based upon

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Acid-base reaction

Redox reaction

Nuclear reaction

None of the above

Which one of the following gases is used for artificial ripening of fruits ?

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Ethane

Ethyne

Methane

Propane

Group VI-B of transition elements contains:

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Zn, Cd, Hg

Fe ,Ru ,Os

Cr, Mo ,W

Mn, Te, Re

Acetic Acid is obtained from:

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Red out

Vinegar

Butter

Milk

The less reactivity of transition metal is due to

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High heats of sublimation

High ionization energies

Low heats of salvation

All these

Which is true about the electronegativity order of the following?

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P > Si

C > N

Br > Cl

Sr > Ca

The fiber which is made from acrylonitrile as monomer:

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PVC

Rayon Fiber

Acrylic fiber

Polyester fiber

Alkene general formula :

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C_nH_2n+2

C_nH_2n

C_nH_2n-2

C_nH_2n+1

Two H-atom combine to form a strong H₂molecule due to

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Increase in potential energy

Decrease in potential energy

Energy remains unchanged

Distance is increased

Compounds containing cyanide group (.........C=H) are called:

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Nitrides

Nitrites

Nitriles

Cyanides

Analytical chemistry is the science of :

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Chemical Characterization.

Physical Characterization.

Biological Characterization.

Biochemical Characterization.

Which isomer of C₅H₁₁OH gives, one dehydration, the greastest number of different alkenes

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Time required to deposit one millimole of aluminium metal by the passage of 9.65 amperes through molten electrolyte containing aluminium ion is

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30 s

10 s

30,000 s

10,000 s

Soil salinity can be measured by

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Calorimeter

Potometer

Porometer

Conducitvity meter

Acetylene is used in the manufacture of

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Rubber

Plastic

Ethyle alcohol

All of these

When a compound X is passed through a dilute alkaline solution of KMnO₄the pink colour of solution is discharged. The compound X is possbibly

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Methane

Ethane

Ethene

Benzene

The temp. and pressure used for PVC polymerization is

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10°C and 10 atm

20°C and 20 atm

52°C and 9 atm

100°C and 10 atm

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99.2%

99.5%

90.5%

96.2%

If the value of principal quantum number is 3. the total possible values for magnetic quantum number will be

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1

4

9

12

Which one of the following has no units of its K_cvalue

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2SO₂+ O₂⇌2SO₂H= 188KJ mole^-1

Which statement about following equilibrium is correct :

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The value ofK_pfalls with arise in temperature.

The value ofK_pis equal tok_c.

The value ofK_pfalls with the increase pressure.

Adding V₂O₅catalyst increase the equilibrium yield of Sulphur trioxide.

Subsidiary quantum number specifies

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size of orbital

shape of orbital

orientations of orbitals

Nuclear stability

Which of the following ion has the highest value of ionic radius?

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Li⁺

F^-

O^2-

B³⁺

The rate constant k of a reaction activation energy Ea and temperature are related by Arrhenius in the form of an equation which is

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A compound having empirical formula C₃H₃O and its molecular mass is 110.02. Its molecular formula is

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C₃H₃O

C₆H₆O₂

C₉H₉O₃

C₃H₆O₂

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