Class 12 Unit 13 s and p block

Which is the $least$  electronegative group of periodic table?

• Halogens

• Noble gases

• Alkali Metals

• Alkaline Earth metals

Which statement is  $TRUE$  about alkali metals?

•  $2^{nd}$  I.E is lower than  $1^{st}$  I.E

•  $2^{nd}$  I.E is higher than  $1^{st}$  I.E

•  $1^{st}$  & $2^{nd}$  I.E are equal

Which of the following decrease as we go down Group 1?

• ,Melting & Boiling Points only

• Electronegativity & Ionization Energy only

• Density

• Melting & Boiling points, electronegativity, & I.E

Which of the following is lighter than Na?

• K

• Rb

• Cs

Reaction of alkali metals with water is:

• endothermic

• exothermic

How are alkali metals protected from getting tarnished?

• by storing under kerosene oil

• by preserving with dilute acids

• by storing them with unreactive substances

Which of the following alkali metal forms $normal\ oxide$   by  $direct$  reaction with oxygen?

• Na

• K

• Li

• Rb

How can we prepare normal oxides of alkali metals?

• by reducing peroxides with metals

• by reducing nitrites & nitrates with metals

• Both

 $Metal+Water\ \rightarrow$  __________

•  $Hydroxide\ only$  

•  $Hydroxide\ +H_2$  

•  $Salt\ +Water$  

Which of the following are strong $oxidizing\ agents$  ?

• Normal Oxides

• Peroxides

• Superoxides

• Both per & super oxides