Question # 1

Ecosystem is smaller unit of

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Lithosphere

Hydroshpere

Amosphere

Biosphere

The general representation for Grignard reagent is.

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RMgX

ReMgX

RXMg

RMgX2

Which acid is used in the manufacture of synthetic fiber

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Formic acid

Oxalic acid

Carbonic acid

Acetic acid

In which hybridization bond angle is maximum

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sp3

sp2

sp

sp3 and sp have same angles

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

Iodine deficiency in diet is known to cause.

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Beri Beri

Goiter

Rickets

Night blindness

In aqua regia, the ratio of conc. HCl to Conc. HNO3 is

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1 : 1

2 :1

1:2

3 : 1

Common names of aldehydes are derived from the common names of.

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Alcohol

Ketones

Carboxylic acids

Alkenes

Acetic acid manufactured by

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Distillation

Fermentation

Ozonolysis

Esterification

Which of the following lipids does not have glycerol backbone.

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Fat

Oil

Cholesterol

Phospholipid

Which acid is used in the manufacture of synthetic fibre

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Formic acid

Oxalic acid

Carbonic acid

Acetic acid

When water is added to plaster of paris, it changes to a hard mass. Its volume also expands upto

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1%

2%

3%

5%

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

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Br₂

F₂

I₂

Cl₂

Which one of the following compounds is most abundant is nature.

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glucose

Starch

Cellulose

Fructose

The percentage of carbon is different types of iron products is in the order of.

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Cast iron > wrought iron > Steel

Wrought iron >Steel >Cast iron

Cast iron > Steel > Wrought iron

The region of earth capable of supposing life is called.

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Atmosphere

Bisphere

Dithosphere

Hydrosphere

Some non protein portion attached to the protein is called.

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Prosthetic group

Secondary protein

Transport protein

All of these

Which metal is redered passive by HNO₃due to formation of a film of metal oxide over the metal

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Pt

Sn

CO

Mn

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