Question # 1

A mixture of weak acid and its salt is.

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Alkaline buffer

Acidic buffer

Neutral buffer

All of above

The element having electronic configuration 1s2, 2s2, 3s2, 3p3 is.

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Trivalent only

Tetravalent only

Trivalent and pentavalent

Pentavalent only

Metallic bond is treated essentially as in character

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Ionic

Covalent

Polar

Non polar

Which of the following is not an alum.

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KAI (SO4)3 12 H2O

NaAI (SO4)2 12 H2O

NH4Fe (SO4)2 12H2O

FeAl (SO4)2 . 12 H2O

Copper occurs in nature as.

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Native

Combined

Both native and combined

None of the above

The pH of the 1.3 x 10^-4 NH₄Cl is

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1.3

4.0

2.886

3.886

Ground state electronic configuration of valence shell in N2 m lecule is written as (a2s)2, (o*2s)2 , (pi sp)4, (o2p)2, Hence, the bond order of N2 molecule is.

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1

2

3

0

An sp3 hybrid orbital contains

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1/4 a character

1/2 a character

2/3 a character

3/4 a character

CFT can very well explain

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Color

Magnetic properties

Spectra of transition metal

All

Variable electrovalency is due to the following reasons.

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Unstable configuration of core

Inset electron pair effect

All of above

None of above

Which is incorrect statement for Xe F2.

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It has linear structure.

It is hydrolyzed rapidly in aqueous solution of a base

It oxidizes Cl and I to Cl2 and I 2 respectively

It cannot act as F donor

CIF is

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Chlorine monoflouride

Fluourine

Monochlorine fluoride

Monofluorine chloride

In each period, the most electropositive element belongs to group.

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18

17

1

2

The electrolytic method super passes all other methods due to.

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Furity

Cheapness

Easy available

All above

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

Which of the following iso electronic spices has the highest IE.

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Ne

Na+

F

O2-

Pick out the ideal conditions needed for the manufacture of H2SO4 by contact process.

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Low temperature high pressure and high concentration of reactants

Low temperature , low concentration of reactants and low pressure

High temperature high pressure and high concentration of reactants

Low temperature, low pressure and high concentration of reactants.

VBT is unable to explain the nature of some of the complexes of.

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Cobalt

Copper

Nickle

Manganese

A colorless gas with pleasant odour and sweet taste.

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N2O

N2O3

NO

N2O4

Magnalium is alloy of Aluminium which is used in

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Scientific apparatus

Aircraft parts

Rail road care

Boat machinery

Which one of the following sets of elements has the strongest tendency to form positive ions in gaseous state.

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Li, Na, K

F, Cl, Br

Be, Mg, Ca

O, S , Se

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