Question # 1

The temperature of natural plasma is about.

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200000 ^oC

10000^oC

5000^oC

1000^oC

Fluorine molecule (F₂) is formed by the overlap of

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s - s orbital

s - p orbital

p - p head on overlapping of orbitals

p - p parallel overlapping of orbitals

How many moles of AgCI are produced by combination of 1.0 mole of AgNO₃and 2.0 mole of NaCI

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1.0

2.0

3.0

4.0

Which mixture of gases is used by the deep sea divers.

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Oxygen and nitrogen

Oxygen and helium

Oxygen and carbon di oxide

Oxygen and water vapours

Solvent extraction method is particularly useful technique for separation when the product to be speared is.

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Non volatile or thermally unstable

Volatile or thermally stable

Non volatile or thermally stable

Volatile or thermally unstable

Which compound does not obey the octet rule.

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NH3

BCl3

H2O

CH4

Node is a surface on which probability of finding electron is

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Zero

More than 95%

50%

Infinite

The rate of reaction

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Increase as the reaction proceeds

Decreases as the reaction proceeds

Remains the same as the reactions proceeds

May decrease or increase as the reaction proceeds

The pH of human blood is

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7.0

7.4

4.0

6.5

Gooch crucible is made of.

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Glass

Paper

Teflon

Procelain

the volume occupied by 1.4 of N2 at S.T.P is

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2.24 dm3

22.4 dm3

1.12 dm3

112 cm3

The best reducing agent is

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F^-1

CI^-1

Br^-1

I^-1

Water and Phenol are partially miscible to each other at room temperature when both liquids are mixed together which is upper layer.

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Water in Phenol

Phenol and water

Pure phenol

Pure water

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

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NH3

H2O

CH4

CH3OH

During paper chromatography, the stationary phase is.

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Solid

Liquid

Gas

Plasma

When a reaction proceeds in a sequence of steps, the overall rate is determined by

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Fastest step

Slowest step

Order of different steps

Molecularity of all steps

What amount of NaOH is required to prepare 500 g of 0.5 molal solution.

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10 g

20 g

30 g

40 g

How many sigma and pi bonds are present in C2H2.

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one sigma and two pi

two pi and one sigma

Two pi and three sigma

Three pi and two sigma

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