Question # 1

In the ground state of an atom the electron is present

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In the nucleus

In the second shell

Nearest to the nucleus

Farthest from the nucleus

Which the increase in carbon number of solubility of an alcohol

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Increases

Decreases

Remains unaffected

None of these

Purines include

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Adenine

Guanine

Both a and b

None

Which teat is not given by both glucose and fructose

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Give yellow ppt of CHl₃with alkaline aqueous iodine

With 2, 4-DNPH give yellow ppt of hydrazone

Evolve H₂gas with Na metal

Oxidised with [Ag(NH₃)₂]⁺i.e. Tollen's reagent

By reaction Grignard's reagent with the HCHO we get

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1° - alcohol

2° - alcohol

3° - alcohol

All of these

Which one is a polymer compound?

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SO₂

CO₂

CH₄

PVC

Energy of electron in an orbit according to Bohr theory is negative due to

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Repulsion of electrons in the same orb

At infinity energy is zero ad a traction towards nucleus decreases energy

Electron has negative charge

Product of positive nuclear charge and negative charge is negative

Coordination number of Pt in [PtCI(NO₂) (NH₃)₄]²⁺is

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2-

4

1

6

On adding sodium nitroprusside ketones give

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Red

Wine red

White

Orange

Alcohols of low molecular weight are

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Soluble in water

Soluble in water on heating

Insoluble in water

Insoluble in all solvents

Which of the following alkyl halides is used as a mathylating agent

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CH₂H₅l

CH₃l

C₂H₅Pr

C₂H₅Cl

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Condensation

Dehydration

Dehydrogenation

Hydrogenation

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-1.10 V

+1.10 V

-0.42 V

+0.42 V

Which gas is produced by treating CaC₂with water

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Methane

Ethane

Acetylene

HCI

The number of antibonding electron pairs in O^2-molecular ion on the basis of MOT is

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4

3

2

5

Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as

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Environment

Hydrosphere

Pollutant

Biosphere

The entropy of the universe

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Constant

Is equal to zero

Decreasing

Increasing

In electronic watches or electronic calculators the tiny batteries used are

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Alkaline battery

NICAD battery

Fuel cell

Silver oxide battery

Which of the following does not reflect the periodicity of elements?

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Bonding behaviour

Electronegativity

Ionisation potential

Neutral/proton ratio

The empirical formula of benzene is determined by

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IR spectra

U.V

Elemental analysis

NMR spectra

Elements in which f-orbitals are in the process of completion are called

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Outer transition element

Inner transition elements

Non-tranistion elements

Radioactive elements

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Moles^-2dm⁺⁶

No units

Mole dm^-3

Mole^-1dm^-3

Acetylene when treated with 10% H₂SO₄in the presence of HgSO₄adds one molecule of water to form

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Aldehydes

Esters

Alcohols

Acids

Estimation of Na in sea water is an example of :

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Numerical analysis.

Qualitative analysis.

Quantitative analysis.

None of above.

Hydrolysis of sucrose is called

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Inhibition

Saponification

Inversion

Hydration

Substances that render enzymes catalytically inactive are called

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Conenzymes

Substrates

Inhibitors

Apoezymes

During nitration of benzene, the active nitrating agent is

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NO3

NO2+

NO2-

HNO3

When a colourless gas is passed through bromine water only decolourisation takes place the gas is

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SO₂

HBR

HCl

H₂S

The geometry of 4 sp³hybrid orbitals on an atom is

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Square planar

Tetrahedral

Trigonal planar

Linear

What is the molarity of H₂SO₄solution that has density of 1.84 gm/cc at 35°C and contains 98% by weight?

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4.18 M

8.14 M

18.4 M

18 M

The elements of group lA are called

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Chalocogens

Halogens

Alkali metals

Alkaline earth metals

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