Question # 1

Which of the following mineral does not contain AI?

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Cryolite

Mica

Feldspar

Fluorspar

The weight of 11.2 liters of CO₂ at S.T.P. would be

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88 g

44 g

32 g

22 g

Which of the following is different from the other three oxides?

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MgO

SnO

ZnO

Cr₂O₃

The substance used as a smoke screen in warfare is

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SiCI₄

PH₃

PCI₅

Acetylene

Which quantum number is sufficient to describe the electron is hydrogen atom?

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/

n

m

s

Hydrogen chloride molecule contains

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Covalent bond

Double bond

Co-ordinate bond

Electrovalent bond

The effect of increasing the pressure on the following equilibrium 2A + 3B | | 3A + 2B is

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Forward reaction is favoured

Backward reaction is favoured

No effect

None of the above

The structure of XeF₆

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Distorted octahedral

Pyramidal

Tetrahedral

None of the above

Which one of the following has the lowest boiling point?

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B

AI

Ga

Ti

The main structure features of proteins is

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An ester linkage

An ether linkage

The peptide linkage

All

The valence orbital configuration of an element with atomic number 23 is

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3d⁵

3d³, 4s²

3d³,4s¹,4p¹

3d²,4s²,4p¹

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