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Calculate the change in oxidation state of the oxygen, on reaction with the following alkali methals on heating: (a) Li, (b) Na and (c ) Rb.

Calculate the change in oxidation state of the oxygen, on reaction with the following alkali metals on heating: (a) Li, (b) Na and (c ) Rb.

Which one of the following is most reactive? Li Na K Rb

Answer the following: a. Which of the following has density greater than water ? Li, Na, K, Cs . b. Arrange K, Li, Rb in other of increasing electrode potential. c. Arrange Na, Li, K and Cs in increasing order of metallic bond. d. Which among Na, K, Cs and Li forms stable hydride ? e. On reacting eith oxygen, potassium can form K_(2)O , KO_(2) and K_(2)O_(2) . Is it correct ? f. Give the name of the hardest alakli metal. g. Arrange the following in order orf increasing polarising albility. Li^(o+), Na^(o+), K^(o+), Cs^(o+) h. Mention some of the properties of alkali metals which increse down the group. i. Mention some of the properties of alkali metals which decrease down the group.

Which of the following alkali metals is most electropositive ? Li, Na, K , Rb or Cs .

Choose the correct answers: a. Which of the following alkali metal is the most electropositive ? i. Na , ii. K , iii. Rb , iv. Cs b. Ehich of the following alkali metals has the lowest m.pt. ? i. Li , ii. K , iii. Na , iv. Rb c. Which of the following is the stronger reducing agent ? i. Li , ii. Na , iii. K , iv Rb

Choose the correct answers: a. Which of the following alkali metal is the most electropositive ? i. Na , ii. K , iii. Rb , iv. Cs b. Which of the following alkali metals has the lowest m.pt. ? i. Li , ii. K , iii. Na , iv. Rb c. Which of the following is the stronger reducing agent ? i. Li , ii. Na , iii. K , iv Rb