Question # 1

Which is not used of Borax

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Softening of water

As medicine for washing eyes

As flux in metallurgical operations

To make quartz

Which one is not property or uses of mustard gas

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Used in 1st world war

Powerful vesicant

High boiling liquid

High boiling gas

Which element has lowest melting point

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Beryllium

Magnesium

Calcium

Barium

Aluminium oxide is

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Acidic oxide

Baric oxide

Amphoteric oxide

None of these

Which is more basic

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RbOH

NaOH

KOH

Li OH

Which three elements are needed for the healthy growth of plants

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N,S,P

N,Ca,P

N,P,K

N,K,C

Which one of the following compounds is not derivative of NH3.

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Aniline

Hydrazine

Phenyl hydrazine

Picric acid

Starch mixture of

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Amylose and xylose

Amylopectin and lactose

Lactose and sucrose

amylose and amylopectin

Boron usually exist in nature as

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Borides

Oxborates

Free element

It is a artificial element

Bleaching powder may be produced by passing chlorine over.

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Calcium carbonate

Hydrated calcium sulphate

Anhydrous calcium sulphate

Calcium hydroxide

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 are alkaline earth metals?

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Be, Mg, Ca

Li, Na, K

Fe, CO, Ni

B, Al, Ga

Ammonium nitrate fertilizers is not used for which crop

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Cotton

Wheat

Sugar cane

Paddy rice

In which of following processes are small organic molecules made into macromolecules

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the cracking of petroleum fractions

the fractional distillation of crude oil

the polymerization of ethene

the hydrolysis of proteins

During Nitration of Benzene the active nitrating agent is

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NO₃

NO₂⁺

NO₂

HNO₃

Cyanogen chloride reacts with ethyl magnesium bromide to give

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CH₃CH₂Cl

CH₃CH₂Br

C₄H₁₀⁺

CH₃CH₂CN

Element of which group are called non typical transition elements.

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IB

II B

II A

VII B

Which compound is the most reactive

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Benzene

Ethene

Ethane

Ethyne

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