How many of the follownig alkali metals form coloured paramagnetic compound as major product on burning with excess of `O_(2)` ?
` Li,Na,K,Rb,Cs

Which compound will not form same major product on reaction with HBr and HBr//H_(2)O_(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 are paramagnetic? MgO,KO_2,Na_2O_2,BaO_2,BeO,CaO,Li_2O

Number of non-radioactive alkali metals forming superoxide as major product on heating with excess O_(2)=X , Number of II-A metals of periodic table whose hydrated halides suffer hydrolysis on heating "=y" .Number of non radio active alkali metals which dissolve in liquid ammonia and produce blue colour solution =u The value of "(x+y-u" ) would be

How many of the following nitrates of metal 'M' decompose on heating similar to as given below in the scheme? (where M = Li , Be, Mg, K, Ca, Sr, Na , Rb, Ba) Metal nitrate overset("Heat")rarr metal oxide + nitrogen dioxide + oxygen gas.

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