Periodic Classification of Elements Additional One Mark Online Test

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

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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

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

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

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

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

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

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

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

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

Q10

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

Q11

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

Q12

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

Q13

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

Q14

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

Q15

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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