Question # 1

Which compounds is alicyclic in nature?

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Cyclobutane

Iso-bstand

n-Butane

Toluend

Glyoxal molecule has?

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two carbonyl groups

One aldehydic and one carbonyl group

Two aldehydic groups

Two carboxyl group

Plaster of Paris is obtained from

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marble

bauxite

gypsum

limestone

Albumins and globulins are defined as

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Derived protein

Conjugated protein

Fibrous protein

Globular protein

Which attractive forces cause molecular solids to be formed?

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lonic

Metallic

Covalent

van der Waals

Which of the following are not known to form compounds in more than one oxidation state?

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Transition metals

Halogens

Alkali metals

Noble gases

Ozone is a gas having boiling point

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Unstable

High

Low

Moderate

Which is not a calcareous material?

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lime

clay

marble

marine shell

Ethyl and methyl groups are equidistant in a chain, the preference is given to?

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Ethyl

methyl

both ethyl and methyl

methyl mostly

Change in enthalpy (∆H) of a system can be calculated by

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∆H=∆E - PV

ΔH =ΔE +q

∆H = ∆E - q

∆Η = ΔΕ + P∆V

Ricket is caused due to the deficiency of vitamin

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A

D

B

E

The ionization constant of an acid is expressed in term of the following constant

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Kw

Kn

Ka

Kb

NaHCO₃is commonly called

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Soda ash

Baking soda

Washing soda

None of these

Atomospheric pollutant is

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CO₂

CO

O₂

N₂

Acetic acid is also named.

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Methanoic acid

Ethanoic acid

Propanic acid

Butanoic acid

A reaction in which an atom or a group of atoms replaces an atom or a group of atoms in the molecule of a substance is known as

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Addition reaction

Condensation reaction

Elimination reaction

Substitution reaction

Pakistan in the beginning was a country :

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Industrial

Chemical

Agrarian

Technologies

The hydrocarbon which is used as an illuminating agent

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Methane

Methene

Methyne

B & C

An ionic compound A+B is most likely to be formed when

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The ionization energy of A is high and electron affinity of B is low.

The ionization energy of A is low and electron affinity of B is high.

Both ionization energy of A and electron affinity of B are high.

Both ionization energy of A and electron affinity of B are low.

Physical properties of alkanes increase with increase of all physical constants except

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Boiling points

Melting points

Density

Solubility

The radius of ion while considering it to be spherical in shape is called:

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Covalent radii.

Atomic radii.

Ionic radii.

Both (a) and (C).

Alkyl halides are considered to be very reactive compounds towards nucleophiles because

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They have an electrophilic carbon

They have an electrophilic carbon and a good leaving group

They have an electrophilic carbon and a bad leaving group

They have a nucleophilic carbon and a good leaving group

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