A, B and C are three elements which undergo chemical changes according to following equations: (i) A 2 O 3 + 2 B → B 2 O 3 + 2 A (ii) 3 CSO 4 + 2 B → B 2 SO 4 3 + 3 C (iii) 3 CO + 2 A → A 2 O 3 + 3 C (a) Which of these is most reactive? (b) Which of these is least reactive? (c) Arrange these elements in order of increasing reactivity

(a) The most reactive element is 'B' as it has displaced both 'A' and 'C' from their compounds. (b) The least reactive element is 'C' as it has been replaced by both 'A' and 'B'. (c) The elements in the increasing order of reactivity are C < A < B. High reactive element displaces low reactive element from its salt solution.

E M B I B E

MODERN'S ABC+ OF SCIENCE CHEMISTRY>Chapter 3 - Metals and Non-Metals>TEST YOURSELF>Q 5

MEDIUM

10th CBSE

IMPORTANT

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An element forms an oxide $A_{2} O_{3}$ which is acidic in nature. Identify A as a metal or non metal?

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Important Questions on Metals and Non-Metals

MEDIUM

10th CBSE

IMPORTANT

MODERN'S ABC+ OF SCIENCE CHEMISTRY>Chapter 3 - Metals and Non-Metals>TEST YOURSELF>Q 6

A solution of

{CuSO}_{4}

was kept in an iron pot. After a few days the iron pot was found to have a number of holes in it. Explain the reason in terms of reactivity. Write the equation of the reaction involved.