Question # 1

Ozone is effectively removed by

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TNT

CFCs

PVC

CNG

The actual volume of gas molecules is considered negligible at following pressures

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2atm

4atm

6 atm

8 atm

In most of the cases the molecular crystals are

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very soft

soft

extremely hard

sufficiently hard

Per hydro cyclopentano phenathrene is the basic structure of all the:

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Proteins

vitamins

waxes

amines

The non polar gases of low polarizability have a very:

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Low critical temperature

Stable critical temperature

High critical temperature

NaCl is completely ionized in water due to presence of

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hydrogen bonding

dipole dipole forces

ion dipole forces

London dispersion forces

Diamond, graphite and sand grant molecules are belonged to:

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Inorganic

Organic

biopolymer

synthetic

A fat or oil is characterised for extent of unsaturation by one of the following number,which one

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rancidity number

acid number

iodine number

saponicfication number

Which of the following alpha-Amino acids has basic R-group

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Proline

Glutamic acid

Histidine

Valine

Units of van der Waals constant a is

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atm dm⁶/mol² & Nm⁴/mol²

atm dm⁴/mol² & Nm⁴/mol²

atm dm⁴/mol² & Nm⁶/mol²

None of these

As gases can adopt the shape of the container so they have

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no fixed shapes

fixed shapes

different shapes

definite shapes

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99.2%

99.5%

90.5%

96.2%

Aldehydes which do not haveα-hydrogen undergo

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Aldol combination

Cannizzaro's reaction

Substitution

Elimination

In the electrolysis of fused bauxite (Al₂O₃2H₂O) with fused Cryolite (Na₃AlF₆) using carbon rods as anode. The product obtained at cathode is

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Na metal

F₂gas

Al metal

O₂gas

Extent to H₂ + L₂à2Hl can be increased by :

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Increasing temperature.

Increasing product.

Increasing pressure.

Adding a catalyst.

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0.60

1.67

0.66

2.6

95% alcohol is called

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Rectified spirit

Spirit of wine

Spirit

Methylated

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Reversible reaction

Irreversible reaction

Spontaneous reaction

None of these

Which of the following waste material is not recycled for use again

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Paper

Plastic

Hides of animals

Glass

The nature of positive ray depend on:

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The nature of electrode.

The nature of discharge tube.

The nature of residual gas.

All of above.

What is the structure of the ester formed from propanoic acid and ethanol

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Half life period of a first order reaction is independent of:

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Presence of catalyst.

Conditions of temperature

Initial concentration of the compound

All of above

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