Which of the following is TRUE of redox reactions? The element that undergoes an

Question

Which of the following is TRUE of redox reactions? The element that undergoes an increase in oxidation number is the oxidizing The element that is oxidized gains electrons. The reducing agent is the element that loses electrons. The oxidizing agent is the element that is oxidized. The element that is reduced will have an increase in oxidation number. What are possible products of the acid-base reaction between HNO_3. and Al(OH)_3 after the reaction is balanced? Al(NO_3)_3 + 3H_2O Al(OH)_2 + H_2NO_4 2AlOH + 6HONO_2 3AlNO_3 + 3H_2O 3HONO_3 + AlH In molecules (e g., H_2O), hydrogen behaves like a Group 1 atom and has an oxidation number of but when bonded with a metal (e g., KH) it behaves like a Group atom and has an oxidation state of +1.110 0. 17.-1 +1,17,-1 +1,17.0 -1,18.-1

Explanation / Answer

28) C

The reducing agent is the element that loses electrons.

29) A

Al(OH)3 + 3HNO3 -----------------> Al(NO3)3 + 3H2O

30) C

+1, 17 , -1

General oxidation number of H = +1

In metal hydrides, H has -ve oxidation number = -1

It is same as that of halogens ( group 17).

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