Question # 1

Phosphorus helps the growth of

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Root

Leaf

Steam

Seed

SO2 is not absorbed in water directly to form H2SO4 because.

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The reaction does not go to completion

The reaction is quite slow

The reaction is exothermic

SO3 is insoluble in water

Dolomite is a carbonate of

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Be

Mg

Na

Ba

Which of these polymers is an addition polymer

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Nylon 6, 6

polystyrene

Terylene

epoxy resin

Conversion of ammonium carbamate into urea is

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Hydrolysis

Hydrogenation

Hydration

Dehydration

On heating aldehydes with Fehling's solution we get a precipitate whose colour is

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Pink

Black

Yellow

Brick red

Catalyst used to reduce carboxylic acid to alcohol is

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H₂/ Ni

H₂/ pt

NaBH₄

LiAIH₄

The most reactive Alkyl halide is

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Alkyl Iodide

Alkyl Bromide

Alkyl fluoride

Alkyl Chloride

Which of the following derivative cannot be prepared directly from acetic acid

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Acetamide

Acetyl choride

Acetic anhydride

Ethyl acetate

In modern periodic table VI period contains elements

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8

18

10

32

Which one of the following does not belong to alkaline earth metals

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Be

Ra

Ba

Rn

Magnesium metal does not burn in the jar of

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N2

O2

Ne

N2 and O2

Acetylene reacts with ammoniacal cuprous chloride a red ppt is formed. This red ppt is of

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Copper chlorite

Coper chlorate

Cupric oxide

Copper acetylide

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

Which field produces significant amount of methane in the atmosphere

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paddy field

Cotton field

Can sugar field

Wheat field

The disease can be eradicated by using pesticides.

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Malaria

Yellow fever

Sleeping sickness

All of these

In which group, melting point and boiling point increase downward in a group

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IA

II A

VII A

Both a and b

The chemist who synthesized urea from ammonium cyanate was

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Berzelius

Kolbe

Wholer

Lavoisier

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