Question # 1

------------- does not belong to Alkaline-Earth metals

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Be

Ra

Ba

Rn

In which one of the following sets do all three particles have same number of total electrone

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F- ,Cl-,Br-

Li+ , Na+ , K+

N^--3, O-2, F-,

Na+, Mg+2, K+

Which is called milk of magnesia.

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MgCO3

Mg(OH)2

MgSO4

MgCl2

Maximum number of unpaired electrons is in

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O₂

O₂⁺

O₂^-

O₂^2-

The aqueous solution of which substances is green in colour

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K2CrO4

K2CrO7

KMnO4

K2MnO4

Industrially ethanal is prepared by air oxidation of.

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Ethane

Ethene

Ethyne

Acetic acid

Which of the following sulphates is not soluble in water.

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Sodium sulphate

Potassium sulphate

Zinc sulphate

Barium Sulphate

The percentage of nitrogen in urea is.

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36%

46%

56%

65%

Which compound shows maximum hydrogen bonding with water.

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CH3OH

C2H5OH

CH3-O-CH3

C6H5OH

The presence of a double bond in a compound is the sign of

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Saturation

Un-saturation

Substitution

None of these

Which process is used to convert vegetable oil to vegetable ghee.

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Hydrolysis

Oxidation

Esterification

Hydrogenation

Corundum is

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Al2O3

Na2AlF6

Quartz

Calcium

Which one of the following liberates CO2 from an aqueous solution of NaHCO3.

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Acetic acid

Ethyl alcohol

Phenol

Acetyl chloride

Ozone depletion in stratosphere region is mainly due to the reaction of O3 with

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O2

SO2

CFCs

All of these

The reaction between Cu and conc. H2SO4 produces

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SO3

SO2

H2

Cu + ions

Which compound is called universal solvent

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CH₃OH

C₂H₅OH

CH₃O CH₃

H₂O

Which halogen will react spontaneously with Au_(s)to produce Au³⁺

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Br₂

F₂

I₂

Cl₂

The number of possible isomers of xylene are

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2

3

4

5

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