Question # 1

One of following is argillaceous material

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Marble

Clay

Lime

Marine Shell

Which one of the following has lowest first ionization energy.

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Li

Na

Rb

Cs

Ammonium nitrate fertilizers is not used for which crop

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Cotton

Wheat

Sugar cane

Paddy rice

Which is the longest periodic table

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4

5

6

7

Which one is not use of lime

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Extraction of metals

Ceramic industry

Preparation of bleaching powder

Preparation of gypsum

Which of the following is an addition polymer

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Polyester

Polystyrene

Nylon 6,6

Terylene

The concept of atomic number was introduced by

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Alrazi

Mendeleeve

Moseley

Dobereiner

The state of hybridization of carbon atom in Ethyne

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sp

sp²

dsp²

sp³

Linear shape is associated with set of hybrid orbitals

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SP

sp²

dsp²

sp³

Which of the following elements is not present abundantly in earth's crust.

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Silicon

Aluminium

Sodium

Oxygen

Oxidation of NO in air produces

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N₂O

N₂O₃

N₂O₄

N₂O₅

Which one is not property or uses of mustard gas

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Used in 1st world war

Powerful vesicant

High boiling liquid

High boiling gas

Which one of the following is a condensation polymer

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Polystyrene

Polyester

Polyethene

Nylon 6,6

Which of the following enzymes brings about the hydrolysis of fats

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Urease

Maltase

Zymase

Lipase

In Pakistan pulp is usually bleached with Cl2. The residual chlorine is removed from pulp by an antichlor which is

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dil HCl

dil NaOH

Water

NaCl

Which one of the following is secondary pollutant of atmosphere.

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CO

NO2

SO2

H2SO4

SN1 reaction usually occurs in

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Primary alkyl halides

Secondary alkyl halides

Tertiary alkyl halides

All of these

Starch mixture of

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Amylose and xylose

Amylopectin and lactose

Lactose and sucrose

amylose and amylopectin

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