Question # 1

Which one of the following oxides is amphoteric in nature.

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MgO

Na2O

SO2

ZnO

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

In unimolecular reactions, the reaction completes in

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_{One step}

Two steps

Three steps

None of these

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%

The region of earth capable of supposing life is called.

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Atmosphere

Bisphere

Dithosphere

Hydrosphere

Which substance is formed by the catalytic oxidation of methane at 100 ^oC, 200 atmospheric pressure and copper catalyst

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Methanol

Methanal

Methanoic acid

All of these

The brown gas formed when metal reduces HNO₃

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N₂O₅

N₂O₃

NO₂

NO

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

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Br₂

F₂

I₂

Cl₂

The isomers having same functional group but different alkyl group on either side of functional group are called.

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Metamers

Polymers

Monomers

Homologous series

Industrially ethanal is prepared by air oxidation of.

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Ethane

Ethene

Ethyne

Acetic acid

Which compound is alicyclic in nature.

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Cyclobatane

Iso batane

n butane

Toluene

Which property of triglycerides is used to determine its molecular mass.

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acid number

Saponification number

Iodine number

gold number

Third abundant element on earth crust is.

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Boron

Oxygen

Aluminium

Silicon

For which mechanisms, the first step involved is the same

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E₁and E₂

E₂and SN₂

E₁and E₂

E₁and SN₁

The macro nutrients are required in ranging from

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5 kg to 200 kg

5 kg to 200 g

6g to 200 g

1 kg to 100 kg

The number of acidic hydrogen present in 1- Propyne is

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1

2

3

4

S_N2 mechanism involves

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1st order kinetics

2nd order kinetics

3rd kinetics

zero order kinetics

Which one of the following elements has the largest second ionization energy.

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O

Na

F

Ne

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