Question # 1

The temperature which partially immiscible pair of liquid leads to the formation of a single phase in called.

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Transition temperature

Absolute temperature

Consulate temperature

Room temperature

In Daniel cell, if salt bridge is removed between the two half cells, the voltage.

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Drops to zero

Does not changes

Increases gradually

Increases rapidly

According to MOT, which molecular orbital has highest energy.

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sigma 1s

pi+ 2S

pi 2py

Pi+ 2px

Actual yield is mostly less than the theoretical yield due to the reason that

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Rates of reactions are slow

Loss of the product during handling

Reactions are never completed 100%

Law of conservation of mass is not true

Which one of the following has no tendency of form coordinate covalent bond with H+

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NH3

H2O

CH4

CH3OH

Which element has highest ionization potential

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Li

Na

K

Rb

Node is a surface on which probability of finding electron is

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Zero

More than 95%

50%

Infinite

The tendency of an tom to attract shared pair of electron towards itself is called its.

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Ionization energy

Electronegativity

Electron affinity

dipole moment

When i₂present in the aquous layer in the form of I^-1₃foes to CCI₄layer, then the change in colour is from

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Purple to brown

Purple to green

Green to brown

Brown to purple

Which of the following molecules have highest bond energy

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F2

Cl2

Br2

I2

The shape of diamond crystal is.

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cubic

Hexagonal

Tetragonal

Orthorhombic

Orbitals having same energy are called.

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Hybrid orbitals

Valance orbitals

Degenerate orbitals

d- orbitals

According to classical concept, oxidation involves

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Addition of oxygen

Addition of electron

Removal of hydrogen

All are correct

Standard enthalpy of combustion of carbon is -394 kJ mol-1 than, which is the standard enthalpy of formation of CO2

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+394 kJ

-394 kJ

0 kJ

+197 kJ

The influence of temperature on reaction rate is predicated by

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Free energy change of reaction

Arrhenius equation

Van der weal's equation

Kinetic equation

Which of the following molecules have unpaired electrons is the bonding molecular orbitals.

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N2

O2

B2

F2

The pH of 10-3 mole dm-3 of an aqueous solution of H2SO4 is.

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3.0

2.7

2.0

1.5

Salt of weak acid with strong base when dissolved in water gives.

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Acidic solution

Basic solution

Neutral solution

None of above

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