Question # 1

Point out that which is not an application of liquid crystals?

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Source of energy

In display of electrical devices

For skin thermography

As temperature sensor

The nature of crystals formed due to London forces of interaction are

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molecular

metallic

ionic

covalent

The radioactive disintegration of 238U92 is

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First order

Second order

Third order

Zero order

A compound X has all of the properties below. It is a liquid at 25°C it mixes completely with water it reaets with aqueous sodium hydroxide, What could X be?

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_{Ethanoic acid}

Ethene

Ethanol

Ethyl ethanoate

Which property of liquid is measured by polarimeter

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Conductance

Optical activity

Refractiye Indéx

Change in volume

At constant temperature, volume of given mass of gas in inversely proportional to pressure on it. This statement is according to:

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Hook's law

Graham's law

Bolye's law

Charle's law

Aspartic acid is a (an)

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Monoamino dicarboxylic acid

Diamino Monocarboxylic acid

Aromatic amino acid

Imino acid

The energy difference of d-orbitals varies from

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Atom to atom

lon to ion

Electron to electron

proton to proton

Fungicides are the pesticides which:

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Control the growth of fungus

Kills insects

Kills plants

Kill herb

Nucleic acid contain elements like N,H,O,C and

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Ca

S

P

F

The best concentration unit used for K⁺ ions present in potable water is

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ppm

Mole fraction

Molarity

Molality

The chemical formula of gypsum is

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CaSO₄. 5H₂O

CaSO₄. 4H₂O

CaSO₄. 2H₂O

None of these

Which of the following is the strongest acid?

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CF₃COOH

CBr₃COOH

CH₃COOH

CCl₃COOH

Ethyl bromide on treatment with alcoholic KOH gives

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Ethylene

Ethanol

Acetic Acid

Ethane

When alkyl halide is heated with aqueous solution of ammonia at 100°C the major product is

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Primary amine

Secondary amine

Tertiary amine

Mixture of amines and salt

Glacial Acetic acid is

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Pure acetic acid at 100°C

Acetic acid mixed with methanol

Pure acetic acid at 0°C

Pure acetic acid above 16.6°C

Purines include

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Adenine

Guanine

Both a and b

None

f-Block elements are also called

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Non typical transition elements

Outer transition elements

Normal transition elements

Inner transition elements

Reaction of Grignard's reagent with ketones gives: Reaction of Grignard's reagent with formaldehyde gives:

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Pri-alcohol

Sec-Alcohol

Ter-alcohol

Carboxylic

In the rate equation when the concentration of reactants are unity, then rate is equal to

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Instantaneous rate

Average rate

Active mass of products

Specific rate constant

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Addition Elimination

Addition Reduction

Elimination Reduction

Substitution Elimination

Smallest charge of electricity that has been measured so far is

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Charge on a-rays

Charge on electron (1.602 x 10^-19C)

Charge on x-rays

Charge on gamma rays

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