Question # 1

Which is the strongest reducing agent.

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HF

HCl

HBr

HI

One ppm solution of NaOH Contain 1000 mg of the solute per how much of the volume of the solution.

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1000 mL

100 mL

10 mL

1 mL

Which of the following cast irons is a high carbon, iron carbon silicon alloy.

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Deorizers

Deoxidizers

Deoxifiers

Deterrent

Non localised bonds are referred as

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Metallic bond

Long range bonds

Ionic bond

Covalent bonds

In Dannis's method the end of the copper caps into which graphite electrode are fixed with cement.

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Portiant

Bakelite

Asbestos

All of above

The element having highest ionization energy and least electron affinity belong to

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Period 1 , group 18

Period 2, group 17

Period 2, group 1

Period 2, group 2

Which of the following allows charge transfer through the solution but prevents mixing of the solution.

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Anode

Cathode

Electrode cell

Salt bridge

Which of the following should have the largest dipole moment.

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Carbon tetrachloride

Cis-stibeue

Trans-atibeue

Cis-dichlorocthylene

The steroid which plays an important role in carbohydrate metabolism is.

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Oestrone

Progestrrone.

Androsterone

Cortisone

Which of the following detector is used in HPLC system.

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Differential refractometer detector

UV detector

Diode array detector

All above

Which of the following techniques is bulk technique.

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Powder XRD

Single Crystal XRD

SEM

TEM

Which of the following radical is not a member of III group

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Al³⁺

Fe²⁺

Ca²⁺

Fe³⁺

___________ surfactants perform well over a wide range of water hardness and pH.

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Anionic

Cationic

Nonionic

Neutral

Which of the ionic possesses highest bond energy.

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C-C

Si -Si

Ge - Ge

Sn -Sn

The point group of XeOF4 is.

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C6v

C4h

D4h

D2h

Which one of the following is natural polymer.

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Starch

Nylon-6

Neoprene

Buna-S, SBR

The first ionization energy in electron volts of nitrogen and oxygen atoms are respectively given by.

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14.6, 13.6

13.6, 14.6

13.6, 13.6

14.6, 14.6

Which of the following is not a property of Cr.

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it is brilliant silvery metal

it is malleable

It can take very high polish

Its surface is tarnished easily

The width of a carbon nano tube is.________ nm

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1

1.3

2.5

10

Which of the following elements would have the lowest first ionization energy

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Mg

Rb

Li

Ca

Which of the following process is not physical in nature.

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Mixing

Flocculation

Sedimentation

Activated sludge process

What is the effect of aluminum in cast iron.

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To increase hardness above 0.5 %

To deoxidize molten cast iron

To affect machinability, ductility and shrinkage depending on form

Both A and B

Zeigler Natta catalyst is.

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Pt/PtO

TiCl4/Al(C2H5)3

Pt/Rh

Pt

The chrome vanadium steels contain how many percent of vanadium.

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0.15 to 0.30

0.05 to 0.15

0.30 to 0.45

0.45 to 0.60

The gap between occupied and the unoccupied orbitals is not very large and the conduction of electricity is negligible at lower temperature and appreciable at high temperatures then it will be.

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Good conductor

Non conductor

Semi conductor

None of the above

Which among the following is a false statement.

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SiO2 has a structure similar to that of CO2

Natural Si exists only in the combined state

Si can be prepared by reducing SiO2 with Mg

Si does not exist in graphite like structure, but exists only ni diamond like structure.

The atomic orbitals are progressively filled in order of increasing energy. This statement is called as

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Hund's rule

Aufbau's rule

(n+1) rule

Planck's rule

Equal volumes of all gases, under similar conditions of temperature and pressure, contain equal number of molecules. This is a statement of.

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Graham's law

Dalton's law

Avogadro' law

Boyle's law

The correct order of thermal stabilities of hydriedes of group 15 is.

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NH3 > PH3 > AsH3 > BiH3> SbH3

NH3 > PH3 >AsH3 > SbH3> BiH3

NH3 < PH3 < SbH3 > AsH3 > BiH3

BiH3 > Sb H3 > AsH3 > PH3 > NH3

Red brass contain about how many percent of zinc.

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20 %

15 %

30 %

25 %

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