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4

During fermentation, the by-product is

A. ethyl alcohol

B. methyl alcohol

C. carbon monoxide

D. carbon dioxide

Correct Answer :

D. carbon dioxide


Related Questions

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4

Riboflavin deficiency causes

A. tongue inflammation

B. pellagra

C. night blindness

D. anaemia

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4

Even as early as 3000 BC glass was known to the

A. Europeans

B. Egyptians

C. Asians

D. Americans

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Oxalic acid is used in the manufacture of

A. tincture iodine

B. paints

C. ink

D. aerated water

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4

Which of the following statements regarding natural radioactivity is true?

A. It is spontaneous disintegration of atoms

B. It is induced by bombardment with projectiles

C. It is transmutation of atoms with projectiles

D. It is dependent on temperature

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4

The pH or pure water is nearly 7.0 It will increase on the addition or

A. hydrochloric acid

B. ammonia

C. cane sugar

D. common salt

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4

Which of the following is not a metal?

A. Lithium

B. Helium

C. Sodium

D. Cobalt

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Physico-chemical characteristics of water in water sources undergo changes due to

A. aquatic macrophytes

B. aquatic fungi

C. effluents

D. evapotranspiration

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4

Petroleum ether is also known as

A. kerosene

B. naphtha

C. lubricating oil

D. asphalt

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4

A common rodenticide is (Rat Poison)

A. malathion

B. parathion

C. zinc phosphide

D. diuron

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4

The carbon cycle ensures that

A. the percentage of carbon dioxide in air is kept almost constant

B. air always contains a constant proportion of oxygen

C. sufficient amounts of carbohydrates are produced

D. the process of photosynthesis proceeds smoothly

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4

Which of the following is not a characteristic of potable water?

A. It must be free from suspended impurities

B. It must be free from harmful bacteria

C. It must contain traces of sodium bicarbonate

D. It must have a fishy odour

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4

Solder is an alloy of

A. tin and copper

B. tin and lead

C. tin and zinc

D. tin, copper and zinc

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4

Colour blindness is

A. a congenital disease

B. a communicable disease

C. an acquired disease

D. a contagious disease

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4

Concrete is a mixture of

A. cement an limestone

B. cement and sand

C. cement and gravel

D. cement, sand and gravel

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4

The earliest name given to nitrogen was

A. dephlogisticated air

B. azote

C. inflammable air

D. marine acid air

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4

White lead is

A. a basic salt

B. an acid salt

C. a double salt

D. a normal salt

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4

Clark's method for removal of temporary hardness in water uses

A. calcium hydroxide

B. washing soda

C. calcium chloride

D. zeolite

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Ozone is an allotrope of Oxygen, containing ______ atom/s of oxygen per molecule instead of two.

A. three

B. four

C. one

D. five

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4

Solid carbon dioxide (Dry ice) is also known as

A. Thiokol

B. Drikold

C. Perhydrol

D. Mannitol

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4

Diamonds are weighed in

A. grams

B. pounds

C. carats

D. tons

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Galvanising is coating Iron with

A. nickel

B. zinc

C. chromium

D. copper

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Acute diabetes patients smell of

A. acetone

B. ether

C. ethyl alcohol

D. methyl alcohol

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Smelling salt contains

A. ammonium chloride

B. ammonium carbonate

C. ammonium sulphate

D. potassium nitrate

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4

Mild steel contains

A. iron with very low percentage of carbon

B. iron with high percentage of carbon

C. iron and chromium

D. iron and manganese

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4

Rain water collected after a shower la very pure because

A. the initial showers wash the atmosphere free from most of the impurities

B. it contains desirable salts like sodium chloride and ammonium nitrate

C. it dissolves the gases in the atmosphere like ozone which are good for health in small quantities

D. it is supposed to be 'heaven sent'

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4

High temperature thermometers use

A. sodium amalgam

B. an alloy of sodium and potassium

C. silver amalgam

D. calcium amalgam

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4

The iron salt used in blue prints is

A. ferric sulphate

B. ferric oxalate

C. ferric nitrate

D. ferric chloride

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The noble gas which is present in microscopic quantities in air is

A. xenon

B. krypton

C. argon

D. helium

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4

Invar, used for making pendulums is an alloy of steel with

A. tungsten

B. nickel

C. manganese

D. chromium

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In the mouth, starch is converted into ______ by the action of saliva.

A. sucrose

B. glucose

C. fructose

D. mannose