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Which among the following is a metalloid?

A. Tin

B. Silver

C. Iodine

D. Arsenic

Correct Answer :

D. Arsenic


Related Questions

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The number of neutrons in the nucleus of an atom of mass A and atomic number Z is given by

A. A - Z

B. A + Z

C. Z

D. A

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Which of the following is not an antibiotic?

A. streptomycin

B. terramycin

C. aureomycin

D. codein

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The compound of iron used in the manufacture of blue-black ink is

A. ferric chloride

B. ferric sulphate

C. ferric thiocyanate

D. ferrous sulphate

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The purest form of carbon is

A. animal charcoal

B. coal

C. wood charcoal

D. sugar charcoal

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The gas which has a faint sweet odour is

A. nitrogen

B. nitrous oxide

C. nitric oxide

D. nitrogen peroxide

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One method by which the components of air can be separated is

A. shaking with caustic soda solution

B. shaking with water

C. fractional distillation of liquid air

D. passing air over heated magnesium

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Which of the following is a halogen?

A. Radon

B. Astatine

C. Cesium

D. Ruthenium

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The substance preserved under water is

A. potassium

B. sodium

C. red phosphorus

D. white phosphorus

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Vinegar is an aqueous solution of

A. oxalic acid

B. citric acid

C. acetic acid

D. hydrochloric acid

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The foul odour of gasoline is due to

A. pyridine

B. hydrogen sulphide

C. cacodyl

D. carbylamines

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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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Water has an unusually high bolling point because

A. its molecular weight is low

B. it is denser than ice

C. it is a good solvent for many ionic substances

D. the molecules of water are joined by hydrogen bonds

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Which of the following is not a physical change?

A. Distillation of water

B. Action of heat on potassium chlorate

C. Powdering of glass

D. Burning of an electric lamp

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Temporary hardness is due to the presence of

A. calcium carbonate

B. calcium bicarbonate

C. magnesium sulphate

D. calcium sulphate

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Even as early as 3000 BC glass was known to the

A. Europeans

B. Egyptians

C. Asians

D. Americans

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A burning substance which continues to burn in a jar of carbon dioxide is

A. zinc

B. red phosphorus

C. magnesium

D. sulphur

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Plastics are synthetic

A. rubbers

B. fibres

C. resins

D. sugars

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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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Deficiency of iron causes

A. nervous disorders

B. heart diseases

C. anaemia

D. impairment of vision

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The percentage of silver in German silver is

A. ten

B. twenty

C. zero

D. fifty

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Heavy water was discovered by

A. TW Richards

B. FW Aston

C. Stas

D. Urey

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Jeweller's rouge is

A. magnetic oxide of iron

B. ferric oxide

C. ferrous oxide

D. ferrous carbonate

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Smelling salt contains

A. ammonium chloride

B. ammonium carbonate

C. ammonium sulphate

D. potassium nitrate

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Metals are usually heavy. A light metal is

A. manganese

B. copper

C. potassium

D. plumbum

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Glass is a ______ mixture of metallic ______.

A. homogeneous, sulphates

B. heterogeneous, nitrates

C. heterogeneous, carbonates

D. homogeneous, silicates

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In the nitrogen cycle, denitrifying bacteria

A. oxidise ammonia to nitrates

B. convert nitrogen into ammonia

C. oxidise ammonia to free nitrogen

D. oxidise ammonia to oxides of nitrogen

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A hormone which contains iodine is

A. adrenalin

B. glucagon

C. epinephrin

D. thyroxin

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During fermentation, the by-product is

A. ethyl alcohol

B. methyl alcohol

C. carbon monoxide

D. carbon dioxide

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A valuable by-product in the manufacture of soap is

A. stearic acid

B. sodium hydroxide

C. palmitic acid

D. glycerol

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The flux added in the blast furnace is

A. Limestone

B. FeO

C. SiO2

D. MgO