Question # 1

Ammonia gas used directly as a fertilizer is injected into the soil at a depth of about

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Two inches

Three inches

Five inches

Six inches

Which of the following has linear shape?

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SP

SP²

SP³

None of the above

Which of the following alcohols cannot be produced by treatment of aldehydes or ketones with NaBH₄ or LiAIH₄?

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1-Propanol

2-Propanol

2-Methyl-2-propanol

Ethanol

Which of the following imparts violet colouration to the non-luiminous flame of Bunsen burner?

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NaCI

BaCI₂

CaCI₂

KCI

Which of the following alkali metal hydroxides is the strongest base?

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LiOH

NaOH

KOH

CaOH

Hybridization explain the------- of orbitals

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Type of Bonding

Shapes

Shape and Type of bonding

None of above

The dimension of rate constant of a second order reaction involves

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Neither time nor concentration

Only time

Time and concentration

Time and square of concentration

At room temperature formaldehyde is

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Gas

Liquid

Solid

None of the above

Water (H2O) is liquid while hydrogen sulphide (H₂S) is a gas because

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Water has higher molecular weight

Hydrogen sulphide is a weak acid

Sulphur has high electronegativity than oxygen

Water molecules associate through hydrogen bonding.

Ionic solids with defects contain

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Equal number of cation and anion vacancies

Interstitial anions and anion vacancies

Cation vacancies only

Cation vacancies and interstitial cations

The maximum number of electrons in a subshell for which / = 3 is

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14

10

8

4

At room temperature formaldehyde is

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Gas

Liquid

Solid

None of the above

The maximum number of electrons in a subshell for whichι = 3 is

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14

10

8

4

Leblanc process is employed in the manufacture of

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Baking soda

Washing soda

Potash

Plaster of paris

Which of the following mineral does not contain Al?

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Cryolite

Mica

Feldspar

Fluorspar

Which of the following has greatest tendency to lose electron?

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F

Fr

S

Be

Which of the following nitrogen fertilizer contain more nitrogen

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NaNO₃

KNO₃

NH₄NO₃

Urea

When electrons revolve in stationary orbits,

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There is no change in energy level

They vecome stationary

They are gaining kinetic energy

There is increase in energy

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.

The credit of discovering neutron goes to

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Rutherford

Langmuir

Chadwick

Austen

An endothermic reaction is one in which the reacting substances

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Have more energy than the products

Have less energy than the products

Have the same energy as the products

Are at a higher temperature than the products.

If N_Ais Avogadro's number, then number of valence electrons in 4.2 g of nitride ions N^3-is

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2.4 N_A

4.2 N_A

1.6 N_A

3.2 N_A

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