Question # 1

Which one of the following statements about positive ions is incorrect?

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they are also known as cations

they are formed when electrons are removed from atoms

they are larger than the atom from which hay were formed

they are smaller than the atom from which they were formed

Monosaccharides adn oligosacchardies are generally called as

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Crystal

Sugars

liquids

Non-sugars

Which of the following statement is not correct for glycogen

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It is main storage of carbohydrates

It structure does not resemble Amylopectin

It has 1 → 4 and 1 → 6 glycosidic linkage

On hydrolysis it yields glucose units

Aromatic carboxylic acids have corboxyl group attached to group:

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Alkyl group

Aryl group

Phenyl group

Benzyl group

Choose the correct equation among the following given by clauslus to understand to behaviour of molecules:

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PV =nRT

C_r.m.s= √3RT/M

d = PM/RT

PV = 1/3mnc^-2

The pH range of the acid rain is

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6.5 - 6

Less than 5

8 - 7.5

7 - 6.5

Geometry of NH3 is

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^Tetrahedral

Square planer

Pyramidal

Linear

Fungicides are the pesticides which:

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Kill plants

Kill insects

Kill herbs

Control the growth of fungus

Identify the linear polymer out of following

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Amylose

Amylopectin

Starch

Glycogen

The volume of a gas that is occupied by its one mole at STP is called

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total volume

normal volume

molar volume

atomic volume

The rate of reaction for a reaction is 30 mol dm-3sec-1 if the product of concentration of 10.reactant is unity the specific rate constant is

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25

2.5

30

15

Cannizzaro's reaction in not given by

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Formaldehyde

Acetaldehyde

Benzaldyhyde

Trimethylacetaldehyde

Toluene is also called

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Hydroxyl benzene

Methyl benzene

ethyl benzene

None

Corrosion may be prevented by

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Allcying

Paints

Metallic coatings

All

When an alcohol reacts with SOCI₂an alkyl halide is formed. What are two other products

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SO₂and HCI

SI₂and H₂O

HCI and H₂O

H₂S and HCI

Which has maximum protein content?

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Ground nut

Cow milk

Egg

Wheat

Which of the following statements is most appropriate about effective nuclear charge? It depends upon

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The shielding constant

The atomic number

The charge on the nucleus

Both the nuclear charge and the shielding constant

Noble gases have the electronic configuration with their valance shell ns²np⁶except one

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He

Ne

Kr

Xe

Carboxylic acids generally exists in cyclic

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Monomers

Dimers

Trimers

Tetrameter

The configuration 1s²2s²2p⁵3s¹shows

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Excited state of O₂

Excited state of neon

Excited state of fluorine

Ground state of fluorine atom

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Increase in concentration of 1

Decrease in concentration of I₂

Increase in temperature

Increase in total pressure

C₆H₆Cl₆can be obtained from

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HCl and Benzene

Cl₂and Benzene and AlCl₃

Cl₂and Benzene in diffused light

NaOCl and Benzene

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