Question # 1

Which reagent is used to reduce a carboxylic group to an alcohol

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N₂/ Ni

H₂/Pt

NaBH₄

LiAIH₄

What is clinker

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Roasted calcareous material

Roasted argillaceous material

Roasted calcareous and argillaceous material

Roasted gyposum

The composition of white lead is

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PbCO3.Ph(OH)2

PbCO3.2Pb(OH)2

2PbCO3.Pb(OH)2

PbCO3

Al reacts with caustic soda to form

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Sodium aluminates

Aluminium hydroxide

Aluminium oxide

sodium tetra aluminate

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 of the following enzymes brings about the hydrolysis of fats

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Urease

Maltase

Zymase

Lipase

Ammonium nitrate fertilizers is not used for which crop

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Cotton

Wheat

Sugar cane

Paddy rice

The conversion of ethene to ethanol is an example of.

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Hydration

Dehydration

Neutralization

Esterification

Which substance is used to convert alcohol to alkyl halide.

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SOCl2

PCl3

HCl +ZnCl2

All of these

Hydrogen bond is the strongest between the molecules of.

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HF

HCl

HBr

HI

Grignard reagent is reactive due to

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The presence of halogen atom

The presence of Mg atom

The polarity of C -Mg bond

None of the above

What products is formed when ethyl bromide reacts with magnesium to form Grignard's reagent.

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Pyridine

Anhydrous ether

Ethyl alcohol

Carbon tetrachloride

Sulphur is essential constituent for plants. Which is not role of sulphur

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Chlorophyll development

Development of root system

Constituents of some proteins

Increase transpiration force

Which of the following is non-typical transition element

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Cr

Mn

Zn

Fel

The conversion of ethanol to ethene is an example of.

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Dehydration

Hydration

Hydrogenation

Fermentation

Which alkyne reacts with water and form aldehyde

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Ethyne

Propyne

1- Butyne

2- Butyne

Which hydride is intermediate in nature.

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NaH

BeH2

NH3

HCl

The minimum temperature of troposphere is.

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-2^oC

-56^oC

-100^oC

15^oC

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