Question # 1

An element from the given below exists as discrete small molecules in the solid state. Which is that?

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Sodium

Silicon

lodine

lron

Which woody raw material is used for the manufacture of paper pulp?

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cotton

bagasse

poplar

rice staw

Which one of the following statements about Glucose and sucrose is incorrect?

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Both are soluble in water

Both are naturally occurring

Both are carbohydrates

Both are disaccharides

The sun is a ball of plasma heated by nuclear fusion is

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1.0 million km

2.0 million km

1.5 million km

2.5 million km

A single free chlorine redical can destroy ozone molecules upto:

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100000

100

1000

10000

Glucose and gulose are ____ for each other

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Geometrical isomers

Metamers

Apimers

None

Which of the following gives positive haloform test and positive Fehling solution

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Acetone

Echanol

Acetaldehyde

Formaldehyde

Covalent bonds are

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directional

Bidirectional

Multidirectional

Non directional

A solid nitrate fertilizer reacts with an alkali to produce a gas which turns damp pH paper blue:

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NO₃

NHO₃

NH₂O

N₂H₄O₃

Surfactants are organic compounds; used in detergents which reduce the

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viscosity of water

surface tension of water

boiling point of water

wetting ability of water

If a = b = c and x = y = z 90° then crystal structure is

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Cubic

Tetragonal

Orthorhombic

Triclinic

Which of the following has more unpaired d-electrons?

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Zn⁺

Fe²⁺

Ni³⁺

Cu⁺

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Relative atomic mass of an element is the mass of the element relative to

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1/12 mass of carbon-12

1/12 mass of carbon

1 mass of hydrogen atom

1/16 mass of oxygen

Which is the derived lipid?

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Common fats

Vitamin-D

Common oils

Spinolipids

The valence shell of hydrogen is half filled like those of

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IV - A

VIA

V - A

VIIA

The value of SHE is cathode and anode is always taken to be

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One

Zero

Different

Same

The unit of rate constant k is the same as that of the rate of reaction in

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First order reaction

Second order reaction

Third order reaction

Zero order reaction

In a compound an atom has negative oxidation state because

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Atom is negatively charged

Atom acts as cathode

Atom is more electronegative

Atom has lowest ionization energy

A single free chlorine radical can destroy ozone molecules upto:

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100000

100

1000

10000

Ethyl alcohol reacts with acetyl chloride to form

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Ethyl chloride

Acetic acid

Methyleacetate

Ethyleacetate

A standard hydrogen electrode is used as standard electrode of which electrode potential is arbitrarily taken as

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+1

-1

0.1

Zero

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