Which of the following elements is not present in Duralumin? (a) Al (b) Zn (c) Cu (d) Mg

Match the items in the Left Column with the appropriate items in the Right Column: [1 × 4 = 4] Left Column Right Column 2.11.1 Most electronegative element (a) Cu 2.11.2 Extracted from hematite (b) Cl 2.11.3 The element whose anion accelerates the rusting of iron (c) F 2.11.4 The metal present in a greater percentage in the alloy brass (d) Fe

Write two reasons why curd and sour fruits are not kept in copper and brass vessels for a long time

Match the right column with the left column: Left Column Right Column 2.11.1. Noble Gas (a) Cs 2.11.2. Inver (b) Rn 2.11.3. Least electronegative element (c) Reduction with carbon 2.11.4. ZnO + C → Zn + CO (d) An alloy

The metal which is extracted through thermal reduction is (a) Ag (b) Mg (c) Fe (d) Au

Match the Right column with the Left column: [1 × 4] Left column Right column 2.11.1. An alkaline earth metal (a) Fe 2.11.2. The metal which is present in the highest percentage amount in the alloy invar (b) Zn 2.11.3. An alkali metal (c) Ca 2.11.4. The metal which is given as coating to prevent the rusting of iron (d) K

Which of the following is the formula of zine blende, an ore of zinc? ZnO Zns ZnCO3 InSO4

What reaction occurs at the cathode in the electrolyte method of extraction of aluminium? [1] OR Write whether the following statement is True or False: [1] Free electrons carry electricity through electrolytic substances.

Name the metal which is extracted in thermite process.

Which of the following is an ore of Aluminium? (a) Hematite (b) Bauxite (c) Malachite (d) Chalcocite

Match the Right Column with the Left Column: Left Column Right Column 2.2.1 Metal present in German silver (a) Li 2.2.2 A transuranium element (b) Zn 2.2.3 The metal extracted from calamine (c) Pu 2.2.4 Alkali metal present in second period of periodic table (d) Ni

Why does a copper vessel turn green in open air?