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

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

In the extraction of aluminium by electrolysis, what substances are present in the molten mixture besides pure alumina? What are used as the cathode and anode in this electrolysis? [2+1]

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

What is meant by the electronegativity of an element? How does the electronegativity of Group 1 elements in the long periodic table change from top to bottom? [1+2]

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

If the atomic number of an element is 19, in which group of the modern periodic table is the element placed? (a) Group 1 (b) Group 2 (c) Group 18 (d) Group 9

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

What is meant by ionisation energy of an atom of an element? Arrange Na, Rb, Li and Cs in the increasing order of their ionisation energy. OR The atomic numbers of the elements ‘A’, ‘B’ and ‘C’ are (n-2), n, (n+1) respectively, ‘B’ is an inert gas. In which group of the Periodic Table are ‘A’ and ‘C’ located? Which one among them has the highest reductive power? What is the formula of the compound produced by combining ‘A’ and ‘C’?

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

If the elements are arranged in ascending order of their electropositivity, then choose the correct order (a) C < N < 0 < F (b) C > N > 0 > F (c) O < N < C < F (d) F > C > O > N

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