Question # 1

The working condition/s for SHE

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1atm pressure

1M H-solution

298K temperature

All of these

Which compound is obtained hy the elimination reaction on bromoethane?

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Butene

Ethene

Propene

Propane

What is the formula of cryolite?

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Al2O3.2H2O

Na2B4O7 .10 H2O

Na3AIF6

Ca2B6O11. 5H2O

A substances has M_r74.5, a melting point of 772°C and a boiling point of 1407°C. It conducts electricity only when in the liquid state.What is the bonding present in this substances?

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covalent

ionic

metallic

hydrogen bonding

Diffusion of different species is due to difference of

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potential energy

temperature

density

all the above

The percentage of SO₂ produced by volcanoes is:

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47%

57%

67%

77%

HOCl is a compound:

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Polor inorganic

organic

Ionic

covalant

Glucose and fructose are isomers

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Chain isomers

Position isomers

Functional group isomers

Metamers

Which is not an air pollutant

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N₂

CO

NO

N₂O

Boiling point of H₂O is higher than that of HF although F is more electronegative than O. It is due to

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stronger dipole dipole forces in H₂O

H₂O is neutral HF is acidic

H₂O is angular, but HF is linear

number of hydrogen bonds more in H₂Othan in HF

What will be the shape of a molecule which containstwo sigma bond pairs and one lone pair?

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Linear

V shape

Tetragonal

Triangular

The reaction between fat and NaOH is called:

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Esterification

Hydrogenolysis

Fermentation

Sponification

Atomic number of Al is 13. When it forms ionic bond with oxygen the number of electrons lost by 1 Al atom is

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1

2

3

4

The freezing point of 1 molal NaCl solution assuming NaCl to be 100% dissociated in water in

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-1.86°C

-3.72°C

+1.86°C

+3.72°C

Which is not a fossil fuel

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Petroleum

Coal

Natural gas

None of them

The element caesium bears resemblance with

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Ca

Cr

Rubidium

None of the above

The nitration of benzene takes place when it is heated with a mixture of conc.HNO₃and conc. H₂SO₄at 50°C in ratio of

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1 : 2

1 : 1

1 : 3

2 : 1

SN₂reaction has order of reaction :

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First

Second

Third

Zero

Major component of natural gas is:

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Ethane

Ethene

Propane

Methane

Which if the following has the highest freezing point at one atmosphere

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0.1 M NaCI

0.1 M sugar solution

0.1 M BaCI₂

0.1 M FeCI₂solution

As compared to molar solution, in the molal solution the quantity of solvent is :

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Comparatively lesser

More or less equal

Comparatively greater

Very large

An alkynes having Carbon count of 20 is

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gas

liquid

Solid

None

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