Question # 1

Which of the following compounds will not give Iodoform test on treatment with I₂/ NaOH

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Acetaldehyde

Acetone

Butanone

3-Pentanone

Stability of halogen molecules decreases from

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F2 to I1

Cl2 to I2

I2 to F2

I2 to Cl2

Acetone reacts with HCN to form cyanohydrin it is an example of

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Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic subtitution

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

Which one is alcohol in the following

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CH₃.CH₂.OH

CH₃.O.CH₃

CH₃COOH

CH₃.CH₂.Br

Which of the following elements is not present abundantly in earth's crust

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Silicon

Aluminium

Sodium

Oxygen

The element cesium bears resemblance with

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Ca

Cr

Both of the above

None of the above

The thickness of ozone layer is.

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25 to 50 km

25 to 28 km

3 km only

1 km only

Basicity of ortho phosphoric acid is.

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1

2

3

4

In ethene molecule, the number of atoms which are present in the same plane are.

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2

6

3

4

For which mechanisms, the first step involved is the same

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E₁and E₂

E₂and SN₂

E₁and E₂

E₁and SN₁

Iodine deficiency in diet is known to cause.

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Beri Beri

Goiter

Rickets

Night blindness

Which one of the following uses is not correctly related with the halogen.

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fluorine -------- Teflon

Chlorine ---------Bleaching powder

Bromine ---------------PVC plastics

Iodine -----------Iodex

The most reactive Alkyl halide is

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Alkyl Iodide

Alkyl Bromide

Alkyl fluoride

Alkyl Chloride

Chemical composition of colemanite is

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Ca₂B₆O₁₁. 5H₂O

CaB₄O₇. 4H₂O

Na₂B₄O₇.4H₂O

CaNaB₅O₉. 8H₂O

In which process, an amino acid is produced

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Wurtz synthesis

Strecker synthesis

Kolbe synthesis

Cannizzaro reaction

Which one is not electrophile

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BF3

SO3

AlCl3

NH3

Which gas has highest boiling points.

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He

Ne

Ar

Kr

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