Question # 1

The paramagnetic behaviour of oxygen is well explaned on the basis of.

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M.O Theory

N.B Theory

VSEPR Theory

CF theory

The sum of all kinds of energies of atoms, ions or molecules of a system is known as.

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Kinetic energy

Potential energy

Internal energy

Solar energy

If a strips of Cu metal is placed in a solution of FeSO4

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Cu will be precipitated down

Fe is precipitated out

Cu and Fe both dissolve

No reaction takes palce

Which of the following mixtures of liquids show negative deviation

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Methyl alcohol water

Hydrochloric acid water

Carbon di sulphide chloroform

Chlorobenzene bromobenzene

The molal boiling point constant is the the ratio of the elevation in boiling point to.

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Molarity

Molality

Mole fraction of solvent

Mole fraction of solute

Which element has highest ionization potential

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Li

Na

K

Rb

When a reaction occurs in many steps than the slowest step is.

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Mechanism step

Rate determining step

enthalpy determining step

None of the above

Heat of solution of an ionic compound is equal to.

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Hydration energy

Lattice energy

Slum of both 'a' and 'b'

Difference of both a and b

Which is not decay product of free neutron

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Proton

Electron

Neutron

Antineutrino

Ice float over water because.

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Its structure is diamond like

Its density is maximum at 4 ^oC

It is less dense than water

It has no regular arrangement of molecules.

In paper chromatograghy the point at which the solvent rises to maximum extent is called

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Event

Chromatogram

Solvent front

Base line

The mass of one mole of electrons is.

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1.008 mg

0.55 mg

0.184 mg

1.673 mg

What is bond order.

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Number of unpaired electrons

Number of paired electrons

Number of electrons present in antibonding molecular orbital

Number of bond formed between two atoms after overlap

One mole of SO2 contains

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6.02 x 10²³atoms of oxygen

18.1 x 10²³atoms of SO2

6.02 x 10²³atoms of Sulphur

4 g atoms of SO2

Which is not use of liquid crystals.

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Temperature sensor

Liquid crystal display

Skin thermography

Energy supply in electrical devices.

Which of the following precautions in necessary for smooth filtration

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The filter paper should be of big size

The tip of funnel should not touch the side of the beaker

The stem of the funnel should be very small

The stem of he funnel should remain continuously full of liquid

The percentage of s characters in sp3 hybrid orbital is.

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25%

33.3%

50%

75%

Which of the following compound has the highest % o f oxygen by weight

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CH₃- OH

C₂H₅OH

HCOOH

H₂O

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