Question # 1

Which of the following is ozone?

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O₂

OH

O

O₃

Crater wear takes place in single point cutting tool at

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Flank

Rake

Both Flank & Rake

Side

The blood group which is universal recipient is

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A-

B-

AB+

O+

Who discovered oxygen?

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Joseph Priestley

Linus Yale

Vladimir Zworykin

Joseph James

Silver were turns black after a period of time due of formation of

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Nitrate coating on silver

Oxide coating on silver

Chloride coating on silver

Sulphide coating on silver

Calciferol is the chemical name of which vitamin?

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B2

D

E

B12

Which one of the following is used as an explosive?

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Nitroglycerine

Phosphorus trichloride

Graphite

mercuric oxide

Water stored in a dam exerts pressure

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Mostly downward

Mostly upward

In all derections

Mostly on the sides

Who among the following scientists is responsible for binomial nomenclature?

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Charles Darwin

Cari Von Linnaeus

Theorphrastus, P

Hooker, J.D.

What is the chemical name of bleaching powder?

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Calcium carbonate

Calcium hydrochloride

Calcium Phosphate

Calcium cynamide

What colour do you get when you add all of the additive colours together?

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Black

White

Brown

Grey

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