Question # 1

The boiling point of radon (211 K) is higher than boiling point of Helium (4.4 K) because

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the atomic number of Rn is larger than that of the He

the atomic mass of Rn is larger than that of He

the dispersion forces between Rn atoms are more prominent that between He atoms

Rn atoms are joined by dipole-dipole force whereas He atoms are joined by hydrogen bonding

Which of the following gases shows more ideal behaviour at 0°C

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H₂

CH₄

He

NH₃

The word "Lipids" derived from the language

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Greek

Latin

German

English

All the following statements are incorrect except:

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all of the gases cannot be liquefied

increase of pressure will not decrease the inter molecular distance in a gas

gas molecules do not attract each other at very low temperature

actual volume of a gas is not negligible at very pressure

An organic compound made from oxidation of ethanol is

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Formic acid

Acetic acid

Malonic acid

Citric acid

One of the following is neutral amino acid

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Arginine

Lysine

Glutamine

Valine

The weakest intermolecular forces present in a liquid may be

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Dipole-induced dipole forces

dipole-dipole forces

instantaneous forces

electrostatic forces between ions in a ionic solid

Water is essential for life on

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Moon

Space

Earth

Sun

In many countries plastic waste is collected separetaly and sorted.Some of this is incinerated to provide heat for power stations.
Why is pvc polyvinylchloride,removed from any waste that is to be incinerated?

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It can be melted down and re-used

its combustion products are harmful

it destroys the ozone layer

it does not burn easily

The no. of Ip's on oxygen in CO are

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1

3

4

2

Chloroform (CHCl3) is?

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Primary alkyl halide

Secondary alkyl halide

Tertiary alkyl halide

a liquid

Replacement of Cl of Chlorobenzene to give phenol requires drastic conditions but chlorine of 2, 4-Dinitrochlorobenzene is readily replaced because

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NO₂makes the electron rich ring at ortho and para positions

NO₂withdraws electrons at metaposition

NO₂donate electrons at m-position

NO₂withdraws electrons at ortho and para position

The classify the elements, Newland gave the idea of

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Octaves

Triads

Atomic volume

Atomic mass

Reaction of Grignard's reagent with ketones gives: Reaction of Grignard's reagent with formaldehyde gives:

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Pri-alcohol

Sec-Alcohol

Ter-alcohol

Carboxylic

I-Phenylethanol can be prepared by reaction of benzaldehyde with

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Methyl iodide an Magnesium

Methyl bromide

Methyl bromide and AIBr₃

C₂H₅l and Mg

In the hydrolysis of CH₃COOC₂H₅the acid produced is

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Inhibitor

Catalyst

Auto catalyst

None of above

Which one of the following is not a nucleophile

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H₂O

H₂S

BF₃

NH₃

The number of moles of CO2which contain 8.0 g of oxygen

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0.25

0.50

1.0

1.50

Macromolecules are

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organic molecules

High molecular mass molecules

Natural compounds

Rarely occurring molecules

Most hazardous metal pollutant of automobile exhaust is

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Mercury

Lead

Cadmium

Copper

The experimental relationship between a reaction rate and the concentration of reactants is called

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Order or reaction

Rate law

Activated complex

Molecularity

10 ml of 1.5 M NaOH solution is neutralized by 20 ml of a-M HCl solution. The value of 'a' will be

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1.0

0.75

0.5

0.25

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