Question # 1

When wine is put in air, it becomes sour due to

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Oxidation of C2H5OH

Formation of C2H5NH2

Reduction of C2H5OH

Dissolution of CO2

Which one of the following is an aromatic compound?

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Benzene

Thiophene

Furan

All of them

Monosaccharides adn oligosacchardies are generally called as

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Crystal

Sugars

liquids

Non-sugars

Methyl cyanide, on boiling with mineral acids yield

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Acetic acid

Formic acid

Propanoie acid

Butanoic acid

The element which has greatest value of Reduction potential is used as

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Strongest reducing agent

Weak oxidizing and strong reducing agent

Strongest oxidizing agent

None of these

At STP,a container has 1 mole of Ar,2 moles of CO₂,3 moles of O₂ and 4 moles of N₂.Without changing the total pressure if one mole of O₂ is removed,the partial pressure of O₂

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Is changed by about 26%

Is halved

Is unchanged

Change by 33%

The reaction that generates an ionic bond is

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Halogenation of ethene

polymerization of ethene

Hydrogenation of ethyne

Reaction of ethyne withs sodamide

At freezing point of water, the density decreases due to

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change of bond angles

change of bond lengths

cubic structure of ice

empty spaces present in the structure of ice

Alkaline phosphatese is associated with ______ disease

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Heart disease

Rickets

Diabtese

None

The layer of gases around the earth are called?

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Atmosphere

Hydrosphere

Lithosphere

All of these

When a compressed gas is allowed to pass through a nozzle of a jet into a region of low pressure, it produces

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cooling

vaporization

fusion

expansion

Which one gives acidic reactions?

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CH₃----C≡C-------CH₃

CH₃-----CH₂-----HC=CH----CH₂

CH₃----CH=CH₂

CH₃-----C≡CH

Alcohols, phenols and ethers may be considered as derivative of

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Hydrocarbons

Benzene

Carboxylic acid

Water

The number of coulombs required for the deposition of 107.870 g of silver is

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96500

48250

193000

10000

Cannizzzaro's reaction is not given by:

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Formaldehyde

Acetaldehyde

Benzaldehyde

Trimethyl

Number of isomers of butane are:

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One

Two

Three

Four

The number of atoms or molecules whose concentrations determine the rate of the reaction is called

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Molecularity

Order

Rate of reaction

Rate constant

C₆H₁₂O₆ is molecualr formula of:

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Glucose

Dextrose

Fructose

All of these

What is not true about DNA

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It preserve genetic information

To relicates

Synthesized protein

It has a linear structure

Acid rains are produced by

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Excess NO₂and SO₂from burining fossil fuels

Excess production of NH₃by industry and coal gas

Excess release of carbon monoxide by incomplete combustion

Excess formation of CO₂by combustion and animal respiration

The solution left after the formation of crystals is called :

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Residue.

Filtrate.

Mother liquor.

None of these.

Glycogen is stored in

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Animals

Plants

Soil

None of these

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