Periodic Classification of Elements One Mark Online Test

Periodic Classification of Elements One Mark Online Test (10th Standard Science)

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The number of periods and groups in the periodic table are ______.

A.6, 16 B.7, 17 C.8, 18 D.7, 18

The basis of modern periodic law is ______.

A.atomic number B.atomic mass C.isotopic mass D.number of neutrons

_____ group contains the member of halogen family.

A.17th B.15th C.18th D.16th

_____ is a relative periodic property.

A.atomic radii B.ionic radii C.electron affinity D.electronegativity

Chemical formula of rust is ______.

A.FeO.xH2O B.FeO4.xH2O C.Fe2O3.xH2O D.FeO

In the alumino thermic process the role of Al is _____.

A.oxidizing agent B.reducing agent C.hydrogenating agent D.sulphurising agent

The process of coating the surface of metal with a thin layer of zinc is called ______.

A.painting B.thinning C.galvanization D.electroplating

Which of the following inert gases has 2 electrons in the outermost shell?

A.He B.Ne C.Ar D.Kr

Neon shows zero electron affinity due to ______.

A.stable arrangement of neutrons B.stable configuration of electrons C.reduced size D.increased density

Q10

______ is an important metal to form amalgam.

A.Ag B.Hg C.Mg D.Al

Q11

Which of the following periods is the shortest period in the modern periodic table, containing only two elements?

A.First period B.Second period C.Third period D.Seventh period

Q12

During Baeyer's process for the purification of bauxite, what soluble compound is formed when bauxite is heated with concentrated caustic soda?

A.Sodium meta-aluminate B.Aluminium hydroxide C.Sodium silicate D.Aluminium silicate

Q13

What is the primary purpose of adding fluorspar (\(CaF_2\)) along with cryolite and alumina in the electrolytic reduction of alumina?

A.To act as a catalyst for faster deposition B.To lower the fusion temperature of the electrolyte mixture C.To increase the electrical conductivity of the cathode lining D.To prevent the oxidation of the carbon anodes

Q14

In the metallurgy of iron, roasted iron ore, coke, and limestone are mixed and fed into the blast furnace. What is the correct ratio of these components in the charge?

A.1:4:8 B.4:8:1 C.8:4:1 D.8:1:4

Q15

Aluminium metal is not attacked by concentrated nitric acid (\(HNO_3\)). What is the reason for this passivity?

A.Nitric acid is a weak acid and cannot react with active metals B.Formation of a protective passive oxide film on the metal surface C.Aluminium has a very high positive electronegativity value D.The reaction is highly endothermic and requires high temperatures

Q16

On exposure to moist air, copper vessels form a green layer on their surface. What is the chemical composition of this green layer?

A.Copper oxide B.Basic copper carbonate C.Copper sulphate D.Hydrated copper chloride

Q17

Which form of iron has the lowest carbon content, making it the purest commercial variety of iron?

A.Pig iron B.Cast iron C.Steel D.Wrought iron

Q18

Which of the following is the chief ore of copper, yielding about 76% of the world's copper production?

A.Cuprite B.Copper glanz C.Copper pyrites D.Azurite

Q19

Dental amalgam, used for filling tooth cavities, is an alloy of mercury with which other metals?

A.Aluminium and copper B.Silver and tin C.Gold and platinum D.Lead and zinc

Q20

In Mendeleev's periodic table, which element with a higher atomic mass of 39.95 amu was placed before potassium (atomic mass 39.10 amu) to group it with elements of similar properties?

A.Helium B.Neon C.Argon D.Krypton

Q21

Which of the following periodic properties increases as you move from top to bottom down a group in the periodic table?

A.Ionisation energy B.Electron affinity C.Electronegativity D.Atomic radius

Q22

What is the scientific term used for the rocky, earthy, or sandy impurities associated with an ore in its natural state?

A.Slag B.Flux C.Gangue D.Matte

Q23

Which group of elements in the modern periodic table is known as the family of noble gases?

A.Group 15 B.Group 16 C.Group 17 D.Group 18

Q24

What term is used to describe the entire scientific and technological process of extracting a metal from its ore and refining it?

A.Bessemerisation B.Smelting C.Metallurgy D.Calcination

Q25

How many elements are present in the fourth period of the modern periodic table, starting from potassium and ending with krypton?

A.8 elements B.18 elements C.32 elements D.2 elements

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This free online practice test covers Periodic Classification of Elements from the 10th Standard Science (Samacheer Kalvi) syllabus. Choose the number of questions and an optional time limit, then answer and submit — everything is checked in your browser, with the correct answers and a worked explanation shown at the end. For the full solutions to every question in this set, see the solved MCQs page.

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