Suspended impurities in water are effectively removed by

Question

Suspended impurities in water are effectively removed by

A. adding milk of lime

B. filtering through sand

C. adding filter alum

D. chlorination

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Comment

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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Which of the following is not an alloy of copper?

A. Bronze

B. Brass

C. Solder

D. Gun metal

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Marble is

A. calcium carbonate

B. sodium carbonate

C. magnesium sulphate

D. ferric chloride

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High temperature thermometers use

A. sodium amalgam

B. an alloy of sodium and potassium

C. silver amalgam

D. calcium amalgam

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Which one of the following is used in dry cleaning of garments?

A. asphalt

B. naphtha

C. diesel oil

D. lubricating oil

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

A. tungsten

B. nickel

C. manganese

D. chromium

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The commonest ore of aluminium is

A. cryolite

B. bauxite

C. malachite

D. azurite

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The soaps used in shaving cream are

A. calcium soaps

B. lead soaps

C. soft soaps

D. hard soaps

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Quick lime has the formula

A. CaO

B. Ca(OH)2

C. NaOH

D. Na2CO3

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The depletion of the ozone layer in the upper atmosphere is due to -extensive use of

A. dichloro-phenoxy-acetic acid

B. superphosphate of lime

C. chlorofluorocarbons (CFC)

D. dichloro-diphenyl-trichloro-ethane

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The formula for cane sugar is

A. C6H12O6

B. C2H5OH

C. C12H22O11

D. C7H8O

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Tincture iodine is

A. a disinfectant

B. an analgesic

C. a hypnotic

D. a dye

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Mortar contains cement and sand in the ratio of

A. 1 : 1

B. 1 : 2

C. 2 : 3

D. 1 : 3

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Stainless steel contains steel and

A. manganese

B. vanadium

C. nickel

D. chromium

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In photography, the compound or nitrogen used is

A. Potassium nitrate

B. Silver nitrate

C. Ammonium carbonate

D. Ammonium bicarbonate

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Argyrol used as eye ointment is a solution of

A. hydrogen peroxide

B. silver nitrate

C. tincture iodine

D. m-cresol

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Which one of the following is not radioactive?

A. Astatine

B. Francium

C. Tritium

D. Zirconium

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On chemical analysis, a bottle cork is found to contain primarily

A. proteins

B. carbohydrates

C. tannins

D. lipids

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Which of the following is used as a food preservative?

A. phenol

B. washing soda

C. absolute alcohol

D. vinegar

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Reduction involves

A. loss of electrons

B. gain of electrons

C. gain of oxygen

D. removal of hydrogen

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Biogas is obtained during

A. decomposition of petrol

B. fermentation of animal and plant waste

C. destructive distillation of coal

D. electrolysis of water

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

A. sucrose

B. glucose

C. fructose

D. mannose

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The freezing point of water at 760 mm pressure is

A. 273 K

B. 0 K

C. 273°C

D. -273°C

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LSD is

A. an anaesthetic

B. a psychedelic drug

C. an antipyretic

D. an antibiotic

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Which of the following process involves removal of the elements of water?

A. Hydrolysis

B. Hydrogenation

C. Dehydration

D. Dehydrogenation

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Which one of the following metals is used to extract another metal?

A. Lead

B. Tin

C. Zinc

D. Aluminium

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The most abundant constituent in air is

A. hydrogen

B. nitrogen

C. oxygen

D. noble gases

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In addition to nitric acid, another acid which may render iron passive is

A. acetic acid

B. oxalic acid

C. chromic acid

D. citric acid

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Which one of the following is used for dry cleaning?

A. Kerosene oil

B. Diesel oil

C. Lubricating oil

D. Petroleum ether

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The fertilizer which has the largest percentage of nitrogen is

A. urea

B. ammonium nitrate

C. ammonium sulphate

D. calcium cyanamide

Discuss this answer

Accepted Answer

C. adding filter alum

Suspended impurities in water are effectively removed by

Correct Answer :

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Related Questions

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

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