Question # 1

Amino acid produce α-hydroxy carboxylic acid when treated with

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KNO₃/HBr

Zn/HCI

NaNO₂/HCI

Pd/BaSO₄

Esters have fruity smell and are used as artificial favours. Amyl acetate gives flavour of

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Banana

Jasmine

Pineapple

Orange

One dm³of O₂at STP has mass

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32 g

16 g

4.438 g

1.4383 g

To purify water which has mud dissolved in it, a substance which coagulates the suspended particles is used.

The coagulant may be

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Ag⁺

Cu²⁺

Al³⁺

Si⁴⁺

Liquids are less common than solids and gases because

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They exist in narrow range of temperature and pressure

They have definite volume

Liquid molecules can slide past each other

Molecules contain three type of motion

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 umber

rancidity number

iodine number

The reaction which is zero order

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Decomposition ofN2O5

Formation of Glucose in plant

Formation of Fel2

Chorination of methane in sunlight

The actual volume of gas molecules is considered negligible at following pressures

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2atm

4atm

6 atm

8 atm

Proteins loose their ability to work

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by slight heating

by change in structure

by slight cooling

when inside the body

The proteins which are derived by conjugated proteins are called as

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Simple protein

Complex protein

Derived protein

None

Which element differs from rest of elements of its group?

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Ba

Mg

Ca

Be

Forms of waste products :

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Heat

Smoke

Solid

All of these

Potassium chromate has formula

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KClO₃

K₂CO₃

K₂CrO₄

K₂Cr₂O₇

Which of the following compound is known as oil of winter green?

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Phenyl benzoate

Phenyl salicylate

Phenyl acetate

Methyl salicylate

The range of visible spectrum is

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300 - 600 nm

600 - 900 nm

400 - 750 nm

100 - 300 nm

Air pollution is not caused by

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Pollen grains

Hydroelectric power

Industries

Automobiles

The addition of unsymmetrical reagent to an unsymmetrical alkene is in accordance with

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Hund's rule

Markownikov's rule

Pauli's Exclusion principle

Auf ban principle

Simple sugars are :

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Monosaccharides

Disaccharides

Oligo saccharides

Trisaccharides

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

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24

12

13

8

Bell metal is an alloy of Sn and

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Copper

Iron

Zinc

Magnesium

The effective activity of a metal catalyst is increased if it is in

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Solid form

Liquid state

Gaseous state

Finely divided form

A colourless liquid, at room temperature reacts with soda lime to form sodium salt of carboxylic acid and ammonia gas. The liquids is

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Propanamide

Propanoic acid

Formamide

Methyl Ethanoate

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