Question # 1

Simple sugars are:

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Monosaccharides

Disaccharides

Oligo saccharides

Trisaccharides

If a strip of Cu metal is placed in a solution of FeSO4

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Cu will be deposited

Cu and Fe both dissolve

Fe is precipitated out

No reaction take place

Which of the following is not an inorganic macromolecule

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Graphite

Sand

Strach

Diamond

Haemoglobin molecule is how many times heavier than helium atom

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68000 times

17000 times

,34000 times

, 1700 times

As the number of carbon atoms increase the number of isomers also increase. The six carbon compound hexane has as many as:

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10 isomers

3 isomers

5 isomers

6 isomers

Which state about gases is not correct?

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They spread throughout the vessel.

Pressure is due to collision.

There are larger spaces between the molecules.

Molecules are arranged regularly.

Acetic acid is also named:

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Methanoic acid

Ethanoic acid

Propanoic acid

Butanoic acid

Silk is an example of

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animal fiber

vegetable fibre

mineral fibre

none of these

According to kinetic theory of gases kinetic energy depends on

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Temperature

Collision

Pressure

Atomic number

What is true about an alcohol and phenol

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Both are more acidic than water

Both react with NaOH

Both produce CO2 with Na2CO3

Both, produce H2 with Na

Plastics are pollution problem because many plastics:

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are made from petroleum

are very inflammable

burn to produce toxic fumes

decompose to produce toxic products

The word paper is derived from the name of which reedy plany

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Rose

Sun flower

Papyrus

Water hyacinth

Which of these polymers is a synthetic polymer?

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Animal fat

Starch

Cellulose

Polyester

The Mn³⁺has ______ color

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Violet

Green

Red/brown

No color

Corrosion reaction are

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Spontaneous redox reaction

Non-spontaneous acid-base reactions

Spontaneous acid-base reactions

None of these

Which of the following phosphorus is most reactive?

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Red phosphorus

White phosphorus

Scrlet phosphorus

Violet phosphorous

Which acid is used in the manufacture of synthetic fibre?

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Formic acid

Oxalic acid

Carbonic acid

Acetic acid

Which of the following reagents is used to distinguish between methanoic acid and ethanoic acid?

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Amm. silver nitrate solution

Neutral ferric chloride

Sodium hydroxide solution

Sodium carbonate solution

In the ground state, an element has 13 electrons in its M shell. The element is

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Copper

Chromium

Nickel

Iron

pKb value of NH₄OH is 4.74. If the concentration of NH₄OH is 1 molar containing 0.1 molar NH₄Cl, then pH of this buffer will be

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3.74

10.26

4.74

9.26

Hydrocarbon which is liquid at room temperature is

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Pentane

Butane

Propane

Ethane

In Lucas test teriary alcohol make an oily layer

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Immediately

In 10 mins

On heating

Not

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