Question # 1

Natural fertilizer from plants and animals provide nitrogen

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1.5 kg

3.0 kg

4.5 kg

6 kg

Which of the following has greatest reducing power?

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HI

Hbr

HCI

HI

The molal elevation constant is the ratio of the elevation in boiling point to

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Molarity

Molality

Mole fraction of solute

Mole fraction of solvent

Which of the following is an example of body centred cube?

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Magnesium

Zinc

Copper

Sodium

The percentage of nitrogen in urea is

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46

60

70

80

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

Fluorine does not show positive oxidation states due to the absence of

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d-orbitals

s-orbitals

p-orbitals

None

Potassium is kept in

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Water

Ammonia

alcohol

Kerosene

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

Setting of plaster of paris involves

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Oxidation with atmospheric oxygen

Combination with atmosphere CO₂

Dehydration

Hydration to yield another hydrate.

Hypo is used to photography for

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Developing picture

Picture printed

The colour of picture

The fixation of picture

The following has zero valency

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Na

Be

Al

Kr

Dolomite has the composition

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KCL.MgCL₂.6H₂O

Na₃AIF₆

CaCO₃.MgCO₃

CaCL₂.MgCl_2.6H₂O

When quantity of electricity passed is one faraday then the mass deposited at the electrode is equal to

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One gm. atomic weight

One gm. equivalent weight

Electrochemical equivalent

None of the above

Sodium thisoulphate is used in photography because of its

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Oxidizing behaviour

Reducing behaviour

Complexing behaviour

Photochemical behavior

The total pressure exerted by a number of non-reacting gases is equal to the sum of partial pressure of the gases under the same conditions is known as

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Boyle's law

Charle's law

Avogadro's law

Dalton's law

Minamata disease is due to pollution of

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Organic waste

Oil spill in water

Industrial waste containing mercury into fishing water

Arsenic into the atmosphere

Ascorbic acid is chemical name of

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Vitamin D

Vitamin A

Vitamin C

Vitamin B6

With increasing principle quantum number, the energy difference between adjacent energy levels in H atom

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Decreases

Increases

Remain constant

Decreses for low value of Z and increases for higher value of Z.

A clathrate may be defined as a

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Cage compound

Liquid crystal

Mixture

Solid solution

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