[" How many of the following metal(s) is/are denser "],[" than potassium? "],[" Li,"Na,K,Rb,Cs]

How many of the following have more hydration energy than K^+ ion ? [ Li^+ , Na^+ , Rb^+ , Cs^+ , Be^(2+), Mg^(2+), Ca^(2+), Sr^(2+), Ba^(2+) ]

Among the following alkali metals how many are used as photoelectrodes? Li,Na,K,Cs

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

How many of the following gives color to the flame test Li,Be,Na,Mg,Ca,Sr,Ba,K,Rb,Cs

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

Which one of the following alkali metals gives hydrated salts? 1. Li 2. Na 3. K 4. Cs