Question # 1

The pH range of the acid rain is.

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7-6.5

6.5-6

6-6.5

Less than 5

Which compound is more soluble of water

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C2H5OH

C6H5OH

CH3OCH3

n- Hexanol

Chlorobenzene on nitration with conc. HNO3 and Conc. H2SO4 gives.

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m -chloronitrobenzene

o and p chloronitrobenzene

o and m chloronitrobenzene

mixture of O2 m and p chloronitrobenzene

Role of H2S in the given chemical reaction is H2S + I2--------------- 2HI+S

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Oxidising agent

Reducing agent

Dehydrating agent

As an acid

NH4NO3 on heating at 200 ^oC changes to

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N2O

NO

NO2

N2O4

Paraldehyde is used as a

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Medicine

Poison

Polymer

Dye

In pyrite burner, the gas produced is.

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SO3

SO2

CO2

NO

The general formula for Alkene having one double bond is

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C_nH_2n+1

C_nH_2n

C_nH_2n-2

C_nH_2n+2

The gas used in bactericidal lamps is

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Be

Ar

Kr

Xe

Element of which group are called non typical transition elements.

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IB

II B

II A

VII B

Most likely product formed when formic acid is dehydrated in the presence of conc. H2SO4 is.

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CO2 and H2O

CO, CO2 and H2O

CO2 and H2

CO and H2O

Mono saccharides contain carbon atoms.

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3 to 6

3 to 7

3 to 9

only six

Which oxide is more basic in nature.

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Beo

MgO

CaO

BaO

when aldehydes react with Tollen's reagent.

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A ketone is produced

An alcohol is produced

Ag ions are produced

Ag ions are reduced

What is %age of calcium phosphate in bone ash

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20

40

80

60

d -block elements which show anomalous configuration in first series are

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Cr and Ni

Cr and Cu

Cu and CO

Fe and Ni

Which of the following species is ortho and para director.

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CHO

SO3H

NO2

Cl

Boron usually exist in nature as

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Borides

Oxborates

Free element

It is a artificial element

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