Question # 1

1, 3, 5-Pentanetriol has secondary carbon

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3

1

2

Zero

Which of the followings has electronic configuration of Ar in +3 oxidation state

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Sc

Mn

Ti

Zn

Dipole-dipole forces and London forces are collectively called

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hydrogen bonding

Vander Waals forces

Covalent bonding

Ionic bonding

Surface and ground water sources are contaminated by various human activities which of the followings is not a human activity that causes contamination in fresh water

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live stock waste

oil leaks and spills

disposal of industrial effluents

rain

Evaporation of liquid takes place at every temperature. What when temperature becomes constant?

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the rate of condensation is greater than teh rate of condensation

it depends upon the nature of the liquid

rate of evaporation is greater than the rate of condensation

the rate of condensation and evaporation become equal

Which of the following is not a postulate of the kinetic theory of gases?

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when gas particles collide, their total kinetic energy increases

gases consist of molecules in a constant state of random motion

when gas particles collide their total kinetic energy does not change at all

The gas particles travel in straight lines unit they collide with one another or with the walls of the container

Which of the follwing dnes not give brick red precispitate wits Fehling's solution

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Acetaldehyde

Formalin

prorionaldehyde

Acetone

Which of the following metal oxides is antiferromanetic in nature?

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MnO₂

TiO₂

NO₂

CrO₂

Agriculture consumes part of fresh water:

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1%

2%

69%

23%

Equal volume of all gases at same temperature and pressure contain number of molecules:

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multiples

equal

different

in fractions

Coinage metals Cu. Ag, and Au are the least reactive because they have

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Negative reduction potential

Positive reduction potential

Negative oxidation potential

Positive oxidation potential

Which one of the following has highest density

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Zn

Os

Ni

Cu

Hybridized in oxygen is:

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sp

sp²

sp³

dsp³

The unit rate of constan K ismole^-1 dm³S^-1for a chemical reaction, the order of reaction is :

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3

2

1

0

If ketone reacts with Grignard's reagent, it also produces alcohol, But it will be a

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primary alcohol

Secondary alcohol

Tertiary alcohol

Aromatic alcohol

Iron, once dipped in concentrated H₂SO₄, does not displace copper from copper sulphates solution, because

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It less reactive than copper

A layer of sulphates is deposited on it

An inert layer of iron oxide is deposited on it

All valence electrons of iron are consumed

The reaction of sodium with ethanol gives

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CH₃OH

NaH

H₂O

H₂

The detection of functional group is called

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Numerical analysis

Qualitative analysis

Combustion analysis

Quantitative analysis

The wave length of electron as wave is 0.5 nm. What is the wave length in meter

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5 x 10^-9

5 x 10^-12

5 x 10^-6

5 x 10^-10

Which one is the major reason for pollution in high cities?

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Fossil fuel

Acid rain

Heat dispersion

None of the above

Which property depends on the state of system

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Enthaply

Free energy

Entropy

All these

Cotton is ______% cellulose

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90

100

99

30

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