Question # 1

Which of the following solution has highest normality.

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1 N H2PO4

0.5 N H2SO4

6 g NaOH per 100 cm3

4 g NaOH PER 1000 cm3

The acetylene molecule contain a

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Single bond

Double bond

Triple bond

Co ordinate bond

Which of the following statement is not correct regarding galvanic cells.

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Oxidation occurs at the anode

Ions carry current inside the cell

Electrons flow around the external circuit. form cathode to anode

When the e.m.f. of the cell is positive cell reactionis spontaneous

Pick out the incorrect statement about K2Cr2O7

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It is thermally stable

It dissolves in alkali to form chromate

It oxidizes acidified FeSO4 solution to Fe2(SO4)3

It is used as cleansing agent for glassware. etc. When mixed with cold con. H2SO4

The electronic configuration of chromium is 4s1, 3d5, The elements tungsten (W) belongs to the same group and has atomic number 74.The configuration of its valence shell is.

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5s1, 4d5

6s1, 5d5

6s1, 5d6

6s1, 5d4

For each value of l. the number of m velocity are.

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n²

2l

(2l+1)

(n+1)

The structure of SO2 is

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Linear

Angular

V-shaped

Planner

The group of steel are water hardened tool steels.

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Groups S

Groups W

Groups O

Group F

Which of the following proportion is associated with the covalent nature of the compound.

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It conducts electricity in molten stater or aqueous state

It is a non electrolyte

It has high m.p.

It is a compound of a metal and non metal.

Equilibrium constant Kp and Kc are related as

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Kc = Kp (RT)delta n

Kp = Kc (RT)an

Kp = (Kc/RT)delta n

Kp -Kc = (RT)delta n

Ionic reactions mainly take place in.

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Aqueous solutions and organic solvents of high polarity

Non aqueous solvents of low polarity

Gaseous state

Solid state

A compound with an congruent melting point decomposes on heating into.

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A liquid of the same composition as the solid

A new solid phase and a solution with a compositional from that of the solid phase

A new solid phase and a solution with the same composition as that of the solid phase

A solution of fixed composition

Which of the following fuel is used in flame photometry.

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Hydrogen gas

Acetylene gas

Methane

Propane

All above

In a system , when the chemical potential of each component is the same for all phases. the equilibrium is said to be in

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Metastable equilibrium

Thermal equilibrium

Composition equilibrium

Mechanical equilibrium

All cycle engines working reversibly between same temperature of source and sink have the same efficiency This is the statement for the.

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Carnot cycle

Carnot theorem

Narnst theorem

Second law of thermodynamics

Which of the following hydroxide is getatinous in nature.

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Fe(OH)3

Al(OH)3

Ca(OH)3

Cr (OH)3

The compound contains two types of X and Y its crystal structure is a cubic lattice with X-atoms at the corners of the unit cells and Y-atom t the body centre, The simplest formulae of this compound is.

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X2Y

XY

XY2

X8Y

Zinc oxide is.

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A basic oxide

An amphoteric oxide

An acidic oxide

A neutral oxide

The rate of a chemical reaction is proportional to the product of the active mean of the reactants, This is a statement of.

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Law of dynamic equilibrium

Le Chatlier's principle

Law of mass action

Solubility product principle

The equivalent conductance (^) and molar conductance ( ^ m ) of BaSO4 are related as.

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^ = ^m/2

^/2 = ^m

^ = ^m

^ = ^m/4

The agricultural field that produces maximum methane gas into atmosphere is

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Wheat field

Paddy field

Cotton field

Groundnut field

Which of the following statements is not correct with respect to errors in flame photometry.

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Errors rising form the phenomena developed in the Hollow cathode lamp

Background effect

Errors arising from test element itself

Spectral interference

The correct order of electron affinities is.

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C > Si, > Na > Ar

Si > Cl > Na > Ar

C > Na > Si > Ar

C > Si > Ar > Na

Which of the following property of liquids concern with the interval resistance to its flow.

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Refractive inded

Viscosity

Optical activity

Dipole moment

LiAIH4 is most useful reducing agent It reduce to alcohol

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Aldehydes

Ketone

Carboxylic acid

Any of above

The exchange equilibrium in gas chromatography depends on.

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Solubility or absorbability of he sample

The polarity of he stationary phase and analyte

The degree of H bonding

All above factors

Which is not a pollutant from the exhaust of motor.

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Hydrocarbons

Carbon monoxide

NOx

Fly ash

The depolarizer used in dry cell batteries in.

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NH4Cl

MnO2

KOH

Na2PO4

The pKa of an acid having ionization constant 1 x 10^-5 is

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-5

5

9

-9

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

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Dust

Smoke

Metal fumes

All above

Which of the following has the maximum tendency to form complexes.

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K

Na

Rb

Li

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