Question # 1

Which of the following effects best explains that o-nitro phenol is insoluble in water.

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Inductive effect

Resonance effect

Intramolecular H -bonding

Isomeric effect

The extinction co efficient has the units.

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cm2 mol -1

cm3 mol-1

mol cm-3

mol cm-1

The flow of solvent into a solution when two are separated by a semi -permeable membrane is called.

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Mixing

Effusion

Diffusion

Osmosis

The lowest K.E. for an electron is three dime national cubic box is given by

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h²/ 8m^a

3h² / 8 ma²

9h²/ 8ma²

16h² / 8ma²

Variable oxidation states is shown by

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Normal eleemnts

Metallic elements

Non metallic elements

Transition elements

Silicon bronze contains how many percent of silicon.

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96%

3%

1 %

69 %

The percentage of s-character in the hybrid orbitals sp, sp2 and sp3 follows the pattern.

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sp3 > sp2 > sp

sp > sp2 > sp3

sp = sp2 >sp3

sp = sp2 =sp3

Which of the following compounds has fishing ordure

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ammonia

Organic sulphides

Amines

H2S

Which of the following regions of the spectrum would be used to determine the structure of the crystalline solids.

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Microwave

X-rays

Visible

Infrared

Which of the following is a source of energy but does not cause pollution.

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Gaslone

Nuclear power plant

Fossil fuels

Sun

Catenation is a process of.

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Formaton of cations

Deposition of cations

Formation of long chain of identical atoms

Formation of covalent bond

Which of the following salt is not used in salt bridge to minimize liquids junction potential.

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KCl

NH4Cl

KNO3

CaCl2

Which of the following type of polymerization is used for the preparation of synthetic rubber.

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Free radical

Zingler natta

Cationic

Anionic

What is the ratio of the maximum load in a tension test to the original cross sectional area of the test bar.

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Tensile strength

Yield strength

Shear strength

Torsion

Which of the following is not a characteristic of covalent compound.

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They have low melting and boiling points.

They ionize on dissolution in polar solvents

Their molecules have definite geometry

They are generally insoluble in water

in monel metal copper is alloyed wiht which metal.

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Fe

Mn

Ni

All

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

Which one of the following pairs are chemically dissimilar.

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Na and K

Ba and Sr

Zr and HF

Ca and Zn

Compounds formed when noble gasses get entrapped in the cavities of crystal lattices of certain organic and inorganic compounds are called.

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Interstitial compounds

Hydrates

Clathrates

Picrates

Which of the following cells is used to produce electricity from chemical reaction

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Electroytic cell

Galvanic cell

Voltaic cell

Fuel cell

Both C and D

Which of the following molecules has the lowest average speed at 273 K.

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CO2

CO

CH4

O2

In German Silver copper is alloyed with which metal.

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Zn

Ni

Ai

Zn and Ni

What term is used to denote a family of thermosetting polymers that are reaction products of alcohols and acids.

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Alkaline

Alkydes

Alcocide

Ketones

30 mL of an acid solution is neutralized by 15 mL of 0.2 N base. The strength of acid solution is.

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0.1 N

0.15 N

0.3 N

0.4 N

Regarding the internal energy of the molecules, which one of the following statements in not correct.

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It is the sum of vibration rotational and electronic energy

It is a path function

It is a state function

It is an exact differential

When borax is strongly hented, it gives

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B2O4

Na2B4O7

NaBO2

NaBO2 + B2O3

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 steroid which plays an important role in carbohydrate metabolism is.

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Oestrone

Progestrrone.

Androsterone

Cortisone

Conjugation of chromophore

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Deepens the colour

Lightene the colour

Shifts absorption to shorter wavelength

All of these

Select the major product obtained from the addition of HBr to I -Methyl cyclohexene

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1-bromo -2- methyl cyclohexane

6- bromo-i- methyl cyclohex -i- ene

3- bromo -1- methyl cyclohex - 1- ene

I-bromo -I- methyl cyclohexane

Which of the following salt is colourless.

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Zn salt

Co salt

Ni salt

Mn salt

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