Question # 1

Red colour of glass of due to the presence of

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Cu2O

CoO

MnO2

CdS

The rusting of iron is catalysed by which of the following.

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Fe

O2

Zn

H+

Electron gas theory fails to explain

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Specific heat of metals

Electrical and thermal conductivity

Paramagnetic behavior of metals

All of the above

Molten iron withdrawn from the blast furnace is called.

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Wrought iron

Pig iron

Bessemer iron

Stainless steel

Which of the following ions is smallest in size.

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F-

Cl-

I-

Br-

Which one of the following elements shows the most stable oxidation state of +1

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AI

Ga

In

TI

Al2Cl6 is an example of

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Ionic bond

Covalent bond

Co ordinate bond

Metallic bond

Which one of the following oxides is basic.

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MnO

Mn2O3

MnO2

Mn2O7

The structure of SO2 is

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Linear

Angular

V-shaped

Planner

Pick out the incorrect statement.

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Red phosphorus consists of a complied chain structure and black phosphorus has a layer structure.

Nitrogen shows a little tendency for catenation, because N-N a single bond is very strong.

The xamimum number of covalent bonds formed by nitrogen is four, since it has no d-orbitals in its valence shell

The group 15 elements do not form M5+ ions, but +5 oxidatin state is realized only through covalent bonding.

Which of the following is not an ore of iron.

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Haematite

Magnetite

Siderite

Monazite

SO3 exists in form

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a -so3

b-SO3

gama SO3

All above

In coordination chemistry the donor atom of a ligand is.

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A Lewis acid

The counter ion

The central metal atom

The atom in the legend that shares an electron pair with the metal

Oxalic acid when heated withe conc. H2SO4 it gives out.

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H2O and CO2

CO and CO2

CO2 and H2S

Oxalic sulphate

Lux -Flood concept is a dono-acceptor system of.

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Proton

Electron pair

Neurtron

Oxide ion

An equal volume mixture explodes with violence

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H2 & N2O

H2 & NO

H2 & N2O4

H2 & N2O3

Which of the following compound does not following octet rule.

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CS2

PBr3

IBr

Br F3

The element with maximum first ionization energy is.

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B

N

O

C

Which one has a co ordinate bond.

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Al2Cl6

BF3

NaCl

O2

Zero group elements are called as

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Inert gases

Rare gases

Noble gases

All of above

Which of the following element has six electrons in the valence shell but cannot exhibit a maximum co valency of six.

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Sulphur

Oxygen

Selenium

Both A and B

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