1A 2A 3A 4A Periodic table

How is called 1A group in periodic table:

• Alkali metals

• Alkali earth metals

• Earth metals

• Carbon group

How is called 2A group in periodic table

• Alkali metals

• Alkali earth metals

• Carbon group

• Earth metals

Which of the following is a member of 1 A group:

• aluminium

• magnesium

• sodium

• boron

Which of the metals of 1A group is radioactive?

• Li

• Na

• Rb

• Fr

Which gas is produced when alkali metals react with water?

Na + H₂O = NaOH + ______

• hydrogen gas H₂

• oxygen gas O₂

• chlorine gas Cl₂

• none of the above

Which oxide is formed when sodium reacts with oxygen:

Na + O₂ =_________

• Na₂O

• Na₂O₂

• NaO

• NaO₂

Where is kept sodium because of its property reacting violently with the oxygen from air?

• paraffine and oxygen jar

• paraffine and kerosine jar

• kerosine and chlorine jar

• air filled jar

Oxides formed by the metals of 1A and 2 A group are :

• acidic oxides

• neutral oxides

• basic oxides

• amphoteric oxides

How is called NaCl, NaOH, KOH

• sodium chloride, potassium chloride and potassium hydroxide

• sodium hydroxide, sodium chloride and lithium oxide

• sodium hydroxide, potassium chloride and potassium hydroxide

• sodium chloride, sodium hydroxide and potassium hydroxide

Which compounds of sodium form liquid and solid soap:

• NaOH KOH

• NaCl KOH

• NAO K₂O

• Na₂O KOH