Question # 1

Zero group elements are called as

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Inert gases

Rare gases

Noble gases

All of above

The first ionization energies of the elements of the first transition series. (Ti _____ Cu)

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Increases as the atomic number increases

decreases as the atomic number increases

Do not show any change as the addition of electrons takes place in the inner (n-1) d -orbitals.

Increases from Ti to Mn and then decreases from Mn to Cu

Usually the rate of the reactions is expressed as.

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mol dm-1

mol dm-3 s-1

mol dm-2 s-1

mol 2 dm-3 s-1

In the reaction RCO2Na + Na OH (CaO) ______ RH, we eliminate carboxylate group as.

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CO2

Na2CO3

-CO

CaCO3

H2SO4 is manufactured by

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The lead chamber process

The contact process

Both A and B

The Ostwald's process

The mole of photon is knonw as.

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Quantum

Einstein

Energy packet

None of the above

What refers to the removal of zinc from brasses?

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Dezincification

Graphitization

Stabilization

Denitration

In the Friedel-Craft acylation, the amount of AlCl3 tha tmust be taken is

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In catalytic amount

One equivalent

More then one equivalent

Amount does not matter

The ion that is isoelectornic with CO is

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CN-

O2+

CO2-

N2+

An example of acyclic monotterpenoid is

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a -pinene

Camphor

Geranial

Citral

In quantum theory, which of the following tells us that the prediction of quantum mechanics must pass smoothly into those of classical mechanics as we progress in a continuous way from microsopic to macroecopic.

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Uncertainty principle

Correspondence principle

Probability distribution

Aufbau principle

Which of the following is a component of soap.

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Sodium sulphate

Sodium stearate

Sodium chloride

Sodium bromide

Which of the following pollutant result from roasting and heating processes.

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Dust

Smoke

Metal fumes

All above

Of the following an amphoteric hydroxide is.

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Ca(OH)2

NaOH

Be (OH)2

Li OH

Which of the following process is not sorbent separation technolgy.

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Penex

Parex

Molex

Olex

In each period the most electro negative element belongs to.

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^{Group -1}

Group -17

Group -2

Group -18

The electronegativity of phosphorus is.

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3.0

2.1

2.0

1.9

The addition of HCl in the presence of poroxule does not follow anti Markovnikov's rule because.

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HCl bond is too strong to be broken homolytically

Cl atom is not reative enough to add on to a double bond

Cl combines with H to give back HCl

HCl is a reducing agent.

Which of the following will be most effective int he coagulntion of

Fe (OH)3 sol.

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NaCl

MgSO4

AlCl3

Mg3 (PO4)2

Which element out of the following can ehibit a maximum con valency of seven.

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Chlorine

Sulphur

Fluorine

both Cl and F

The process requirieng the absorption of energy of.

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F = F

Cl = Cl

H = H

O = O

Which of the following reactions have small enthalpy change.

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NaOH with HCl

NaOH with CH3 COOH

HCl with NH4 OH

None of these

iodine is used as

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Tincture of iodine

Iodex and antiseptic

Treatment of goiter

All above

Thermocouples have been constructed from

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Chromel ve elumel

Copper vs platinum

Both

None

The formula of bleaching powder is.

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Ca OCl2

CaCIO3

Ca(CIO)3)2

CaOCI

Presence of nitrogen in organic compound to tested as.

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Nitrogen gas

NH3

NO

Amide

The rate constant for 3rd order reaction has the dimentions of.

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mol-2 s-1

I2 mol-2 s-1

mol I -1 s-1

I-1 mol -1 s-1

Oxides ores of Aluminium

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Corundum

Bauxite

Diaspore

All above

O2 molecule is.

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Fermagnetic

Forromagnetic

Paramagnetic

Diamagnetic

How many planes of symmetry are present in benzene.

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1 plane

3 planes

5 planes

7 planes

When a large block of silicon wafer is reduced to smaller component and hence non material is formed this approach is called.

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Bottom up

Top down

Left to right

Right to left

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