Question # 1

A clathrate may be defined as a

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Cage compound

Liquid crystal

Mixture

Solid solution

The number of electrons in the M shell of the element with atomic number 24 is

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24

12

13

8

Which of the following is directly related to Qualitative analysis?

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Identification

Separation

Measurement

Calculation

Dolomite has the composition

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KCL.MgCL₂.6H₂O

Na₃AIF₆

CaCO₃.MgCO₃

CaCL₂.MgCl_2.6H₂O

Oleum is

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Castor oil

Oil of vitriol

Fuming of H₂SO₄

None of them

The total number of protons in 10 g of calcium carbonate is (N₀= 6.023 x 10²³)

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1.5057 x 10²⁴

2.0478 x 10²⁴

3.0115 x 10²⁴

4.0956 x 10²⁴

Salol is prepared from

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Salicyclic acid and phenol

Salicyclic acid and methyl alcohol.

Both

None

The structure of XeF6

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Distorted octahedral

Pyramidal

Tetrahedral

None of the above

The number of oxygen atoms in 4.4 g of CO₂is approximately

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1.2 x 10²³

6 x 10²²

6 x 10²³

12 x 10²³

Which of the following alcohols cannot be produced by treatment of aldehydes or ketones with NaBh₄or LiAH₄?

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1-Propanol

2-Propanol

2-Methyl2-Proponal

Ethanol.

The principal constituent of pyrex glass

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Zn

B

Pb

Cl

Which of the following has linear shape?

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SP

SP²

SP³

None of the above

Outermost shells of two elements X and Y have two and six electrons respectively. If they combine, the expected formula of compound will be

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XY

X₂Y

X₂Y₃

XY₂

By using the fluted filter paper rate of filtration is

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Increased

Decreased

Filtration is constant

Having no effect

When a carbon atom forms single bonds with other carbon atoms, these hybird orbitals overlap with the orbitals of hydrogen to form four bonds which are

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Three sigma and one P_i

Two sigma andtwo P_i

One sigma and three P_i

Sigma

Which of the following halogens does not form its oxyacids?

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F

Cl

Br

I

Which one is not usually used for the crystallization?

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Acetone

Acetic acid

Sulphuric acid

Chloroform

Which one of the following has the lowest boiling point?

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B

Al

Ga

Ti

Bragg's law is given by equation

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nλ= 2θsinθ

nλ= 2 d sinθ

2 nλ= d sinθ

nλ= 1/2 d sinθ

BiCl₃on hydrolysis forms a white precipitate of

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Bismuthio acid

Bismuth oxychloride

Bismuth pentachloride

Bismuth hydroxide.

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