Question # 1

The helical structure of protein is stabilized by

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Peptide bond

Covalent

Hydrogen bond

Glycoside bond

Sponification number of a fat which requires 178,000 mg of KOH for saponification is (mol wt = 1240)

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120

143

208

210

In MgCl2, the oxidation state ofCI is

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Zero

-2

+2

-1

A graph between P and 1/V at constant temperature and number of moles of a gas meets the:

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Y-axis

X-axis

Origin

None of above

Photochemical smog contains----as main reactants

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Nitrous oxide & unburnt hydrocarbons

NO & brunt hydrocarbons

Nitric oxide & unburnt hydrocarbons

N2O & burnt hydrocarbons

Alkali metals react viotlently with halogens:

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Halides

Anhydrides

Hydrides

None of the above

How many grams of NaOH are present in 250 cm3 of its 0.2M solution

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,4 g

, 0.4 g

, 10 g

, 2 g

Calendar stock is process in paper making in which

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Moisture is removed

Pulp is spreaded over fabric or screen

Paper thickness is removed

Paper is wounded in the form of reel

Potable water is considered to be:

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safe for human consumption

the ground water

the Surface water

now water is due to the salt of:

The original volume of a gas at 0° is 273 cm³at constant pressure, its volume at 273°C becomes

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zero cm³

546 cm³

446 cm³

346 cm³

A fat or oil is characterized for extent of unsaturation by one of the following number. Which one is

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Acid number

Saoilucfucation number

Rancidity number

Iodine number

Fluted filter paper is used to:

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Decrease rate of filtration

Increase rate of filtration

Maintain rate of filtration

None of above

Which of the following has unchanged valency?

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H

Na

Fe

Oxygen

Coupling of Pb with its Pb⁺⁺/Pb = -0.13 V and Ag with Ag⁺/ Ag = +0.80 V, the cell reaction

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Which of the following is a method of converting a unsaturated ketone into unsaturated hydrocarbon?

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Aldol condensation

Reimer Tiemann reaction

Cannizaaor's reaction

Wolf-kishner reduction

Pb has inert pair of electrons:

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One

Two

Three

Four

Down's cell is used to prepare

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Sodium carbonate

Sodium bicarbonate

Sodium metal

Sodium hydroxide

Gypsum is a common mineral of

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Magnesium

Strontium

Calcium

Barium

Coordination number of Pt in [PtCI(NO₂) (NH₃)₄]²⁺is

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2-

4

1

6

Alkyl halides on treatment with aqueous KOH give

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Phenol

Alcohol

Aldehyde

Ketone

What is chrome yellow?

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Pbo

Pb₂O

PbCrO₄

Pb₃O₄

The method in which alkanes prepared by alkyle halides in the presence of palladium - charcoal is

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Hydrolysis

Electrolysis

Hydrogenation

Hydrogenolysis

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