Question # 1

Permanent hardness can be removed by using .

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Soda lime

Sodium Zeolite

Quick lime

Lime water

Which one of the followoing is the Hardest coal.

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Peat

Lignite

Bituminous

Anthracite

Alkyl radical is derivative of

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Alkane

Alkene

Alkyne

All

The value of K_c depends on.

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Temperature

Pressure

Volume

Atmosphere

About 99% of atmospheric mass lies in.

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35 km

30 km

15 km

16 km

The earth atmosphere is getting hotter because of :

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SO₂

O₃

CO₂

CO

The reaction goes from left to right , if:

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Qc = Kc

Qc > kc

Qc<Kc

Qc = 0

Cause of diarrhoea among following is:

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Diarrhea

Cholera

Cryptosporidium

Typhoid

Which of the following gas is used in warfare?

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Methane

Ethane gas

Mustard gas

None of these

Which of the following salt is soluble in water.

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NaCl

KCl

Na₂SO₄

All of them

Cholera is caused by

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Protozoa

Virus

Bacteria

Fungi

Which gas is responsible in warming the atmosphere?

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Nitrogen

Hydrogen

Helium

Fluorine

pH of neutral solution is always.

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6

5

7

10

Formula of acetaldehyde is:

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Depending upon temperature variation, atmosphere ins divided into how many regions?

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1

2

3

4

The formula which represents the actual number of atoms in one molecule of organic compound is called.

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Molecular formula

Structural formula

Condensed formula

Dot and cross formula

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