Question # 1

Areal gas obeying Van der Waal's equation will resemble ideal gas ilf the:

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both a and b are large

both a and b are small

a is small and b is large

a is large and b is small

Ozone is an allotropic form of:

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Carbon

Phosphorus

Oxygen

Sulfur

A molecule that has polar bonds but is overall non - polar

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IF

CCl4

PCI3

All

Change in enthalpy (∆H) of a system can be calculated by

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∆H=∆E - PV

ΔH =ΔE +q

∆H = ∆E - q

∆Η = ΔΕ + P∆V

Which property of liquid is measured by polarimeter

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Conductance

Optical activity

Refractiye Indéx

Change in volume

To cook the food at a high mountain is difficult as compared to at sea level. The reason is that:

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the temperature at the top of the mountain is low

the density of water decreases at the mountains

the boiling point of water decreases at the mountain

the hydrogen bonding in water changes with the change of height

Water is essential for life on

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Moon

Space

Earth

Sun

The nature of the attractive force in acetone and chloroform are

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dipole-induced dipole forces

dipole-dipole forces

ion-dipole forces

instantaneous forces

Which one of the following is not a form of chemical bonding?

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covalent bonding

hydrogen bonding

ionic bonding

metallic bonding

Which of the following polymers is used for weather resistant paints

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acrylic resins

polyvinyl acetate

polystyrene

PVC

COD of water can be measured by

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Cr₂O₃

Cr₂O₄^-2ions

Cr₂O₇^-2ions

None of these

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Shift reaction toward forward direction

Shift reaction backward

Lower the value of K_c

No change in reaction

Phosphorous helps the growth of

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Root

Leave

Stem

Seed

The elements with atomic numbers 9, 17, 35, 53, 85 an all

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Noble gases

Halogens

Heavy metals

Light metals

NH₃, HCL, H₂O, HL are:

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Diatomic molecules

Poly-atomic molecules

Mono-atomic molecules

Hetero atomic molecules

Ethylene combines with water in the presence of H₂SO₄+ HgSO₄and forms

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Ethyle chloride

Ethyle alcohol

Carboxylic acid

None of these

The sample being analyzed is called

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Electrolyte

Substance

Analyte

All of above

H₂+ L₂----2Hl

In the above equilibrium system, if the concentration of reactants at 25°C is increased, the value K_C will :

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Remains Constant

Increases

Cecreases

Depends upon nature of reactans

Metal used in the preparation of Grignard's reagent is:

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Ca

Na

Mg

Zn

Source of organic compounds primarily is:

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Plants

Animals

Minerals

A & B

Which of the following statements is not correct regarding bonding molecular orbitals?

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Bonding molecular orbitals possess less energy than atomic orbitals from which they are formed

Bonding molecular orbitals have low electron density between the two nuclei

Every electron in the bonding molecular orbitals contributes to the attraction between atoms

Bonding molecular orbitals are formed when the electron waves undergo constructive interference

The correct set of quantum numbers (n,l and m) respectively of the unpaired electron of chlorine atom is

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2,1,0

2,1,1

3,1,1

3,2,1

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