Question # 1

Magnalium is alloy of Aluminium which is used in

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Scientific apparatus

Aircraft parts

Rail road care

Boat machinery

Hydrogen gas will not redue

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Heated cupric oxide

Headed ferric oxide

Heated stannic oxide

Heated aluminium oxide

Which of the following molecule does not contain the covalent bond between similar atoms.

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N2H4

F2O2

H2F2

H2O2

Which of the following statements regarding covalent bond is false.

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The electrons are shared between atoms.

The bond in non -directional

The strength of the bond depend upon the extent of overlapping

The bond formed may be polar or non-polar

The green colour of glass is due to the presence of.

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Chromium (III)

Cobalt (II)

Mn (IV)

Iron(III)

Which metal can produce dihydrogen gas by reaction with dil H2SO4

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Ag

Fe

Cu

Pt

Stainless steel contains.

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Fe + Cr+ Ni

Fe + Ni + Cu

Fe + Cr+ Cu

Cu + C + Ni

For the respiration of sea divers mixture is used.

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He & O2

Ar & O2

Ne & O2

Kr & O2

H2SO4 acts as gent

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Reducing

Oxidizing

Both A and B

None of above

In 1952 who popularized the use of CFT for inorganic chemist

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Bethe

Orge

Van Vleck

Werner

Which of the following hydroxides has the maximum solubility in water.

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Mg (OH)2

Ca (OH)2

Sr (OH)2

Ba (OH)2

Which of the following statements is worng.

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Covalent compounds are generally soluble is polar solvents

Covalent compounds have low melting and boiling point.

Ionic solids do not conduct electricity is solid state

Ionic compounds conduct electricity in the fused state.

Which one of the following ionsis colourless.

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Cu+

Ni2+

Co2+

Fe3+

The colour imparted by lithium to the flame is.

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Golden yellow

Grasay green

Violet

Red

Which of the following generally increases on going from top to bottom in a group.

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Metallic charcter

Electronegativity

Oxidising behaviour

Raducing behaviour

Inert pair effect is best shown by

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Si

Z

Sn

Pb

In B2H6 molecule

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There exists a direct B-B a -bond

All the atoms are in one plane

All the B-H bonds are normal covalent bonds

There exist two bonds between the boron atoms.

Elements in the same vertical group of the periodical have same

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Number of electron

Atomic number

Number of valence elections

Electronic configuration

Allotropic form of tin

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White tin

Grey tin

Rhomic tin

All above

Increasing oxygen contents in oxyacids leads to.

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An increase in thermal stability

An increase in acid strength

A decrease in oxidizing power

All above

The bond order gives the following valuable information.

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Stability of the molecules of ions

Bond dissociation energy and bond length

Magnetic properties

All of the above

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