Question # 1

How many moles of Helium gas occupy 22.4 L at 0^oC at 1 atm.Pressure?

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0.11

0.90

1.0

1.11

Vitamin A is present in

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Liver

Milk

Green vegetables

All

For preparing an alkane, a concentrated aqueous solution of sodium or potassium salt of saturated carboxylic acid is subjected to

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Hydrolysis

Oxidation

Hydrogenation

Electrolysus

The rate of a reaction that does not involve gases does not depend upon

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Pressure

Temperature

Concentration

Catalyst

At 500 K the equilibrium constant for reaction cis-C₂H₂CI₂ trans-C₂H₂CI₂ is 0.6. At the same temperature the equilibrium constant for the reaction trans-C₂H₂CI₂ cis-C₂H₂CI₂ will be

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0.60

1.67

0.66

2.6

Which of the following statements is most appropriate about effective nuclear charge? It depends upon

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The shielding constant

The atomic number

The charge on the nucleus

Both the nuclear charge and the shielding constant

Which of the following statement regarding catalyst is not true?

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A catalyst remains unchanged in composition and quantity at the end of the reaction

A catalyst can initiate a reaction

A catalyst dose not alter the equilibrium in a reversible reaction

Catalysts are sometimes very specific in respect of reaction

Which of the following pairs are chemically dissimilar?

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Na and K

Ba and Sr

Zr and Hf

Ca and Zn

Portland cement is manufactured by using

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Limestone,clay and sand

Limestone,gypsum and sand

Limestone,gypsum and alumina

Limestone,clay and gypsum

Which of the following geometry is associated with the compound in which the central atom assumes sp³ d hybridization?

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Planar

Pyramidal

Angular

Trigonal bipyramidal

Fertilizer are made by

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Nature only

Artificial methods only

Both artificial and natural methods

None of the above

An electrolyte

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Forms complex ions in solution

Gives ions only when electricity is passed

Possesses ions even in solid state

Gives ions only when dissolved in water

By using the fluted filter paper rate of filtration is

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Increased

Decreased

Filtration is constant

Having no effect

The number of electrons in the M shell of the element with atomic number 24 is

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24

12

13

8

Which of the following value ofΔHf represent that product is least stable?

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-94.0 kcal mol^-1

-231.6 kcal mol^-1

+21.4 kcal mol^-1

+64.8 kcal mol^-1

Sodium thisoulphate is used in photography because of its

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Oxidizing behaviour

Reducing behaviour

Complexing behaviour

Photochemical behavior

Which of the following method is most appropriate for the manufacture of methane?

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By reduction of CH2SL2

Wurtz reaction

Liquification of natural gas

None of these

The acid used in lead storage cells is

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Phosphoric acid

Nitric acid

Sulphuric acid

Hydrochloric acid

The isomers due to the unequal distribution of carbon atoms on either side of the functional group belonging to the same homologous series are called

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Functional isomers

Position isomers

Chain isomers

Metamers

The reaction/method that does not give an alkane is

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Catalytic hydrogenation of alkanes

Wurtz reaction

Hydrolysis of alkyl magnesium bromide

Dehydrohalogenation of an alkyl halide.

When excess of SnCl₂is added to a solution of HgCl_{2, a white precipitate turning to grey is obtained. They grey colour is due to the formation of}

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Hg₂Cl₂

SnCl₄

Sn

Hg

A clathrate may be defined as a

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Cage compound

Liquid crystal

Mixture

Solid solution

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