Question # 1

In a group, the atomic radii from top to bottom

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increase

decrease

don't change

show variable trend

In diamond, the carbon atoms are arranged in a

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tetrahedral manner

hexagonal manner

square planar manner

octahedral manner

Which of the following elements is most metallic

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Bi

sb

As

P

Identify the compound, which give iodoform test

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Methanol

3- Hexanol

Methyl ketone

Propionaldehyde

The basic distinction between solids, liquids and gases lies in difference between.

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Strength of the bonds

Size of molecules

space which the molecules occupy

All of above

Which of the following is a macronutrient?

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Boron

Iron

Copper

Carbon

Vapour pressure is not affected by

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Surface area

Intermolecular forces

Temperature

Nature of liquid

In which of these processes are small organic molecules made into macro-molecules?

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The cracking of petroleum fractions

The fractional distillation of crude oil

The polymerization of ethane

The hydrolysis of proteins

Which of the following is a pseudo solid?

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CaF₂

glass

NaCl

all these

The B.P. of compound is mostly raised by

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dipole-induced dipole interactions

london dispersion forces

intramolecular H-bonding

intermolecular H-bonding

New3spapers can be recycled again and again by how many times?

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5

3

2

4

Which metal is used in the thermit process because of its activity?

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Iron

Copper

Alumnium

Zinc

Which of these polymers is an addition polymer?

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Nylon-6,6

Polystrene

Terylene

Epoxy resin

In an exothermic reaction, a 10° rise in temperature will

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Decrease the value of equilibrium constant

Double the value of K_c

Not produce any change in K_c

Produce some increase in K_c

Molar mass of high molecular w.f. polymers ranges from:

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1000 to 10000

10000 to 100000

100000 to 1000000

1000 to 100000000

The four bonds of carbon in methane are directed towards the corners of

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Cube

Pentagon

Hexagon

Tetrahedron

Cuprous ore among the following is

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Chalcopyites

Azurite

Cuprite

Malachitre

A compound of the formula C₄H₁₀O_{reacts with sodium and undergoes oxidation to give a carbonyl compound which does not reduce Tollen's reagent, the original compound is}

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Diethyl ether

n-Butyl alcohol

Isobutyl alcohol

sec-Butyl alcohol

Wohler synthesized first of all the organic compound:

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Carbohydrates

Urea

Aniline

Toluene

Base buffer solution can be prepared by mixing

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Weak acid and its salt

Strong acid and its salt with weak base

Weak base and its salt with strong acid

Strong base and its salt with weak acid

Which of the following does not turn Schiff's reagent to pink?

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Formaldehyde

Bezaldehyde

Aceton

Methyl chloride

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Alkyl

Alkyl nitrile

Cyanogens

Amine

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