EASY
11th Assam Board
IMPORTANT
Earn 100

Give reason why graphite is used as a lubricant?

Important Questions on The p-Block Elements

EASY
11th Assam Board
IMPORTANT

Give reason why diamond is used as an abrasive?

EASY
11th Assam Board
IMPORTANT

Give reason why aluminium alloys are used to make aircraft body.

EASY
11th Assam Board
IMPORTANT

Give reason why aluminium utensils should not be kept in water overnight.

EASY
11th Assam Board
IMPORTANT

Give reason why: Aluminium wire is used to make transmission cables.

EASY
11th Assam Board
IMPORTANT

Explain why is there a phenomenal decrease in ionization enthalpy from carbon to silicon?

MEDIUM
11th Assam Board
IMPORTANT

How would you explain the lower atomic radius of Ga as compared to Al?

MEDIUM
11th Assam Board
IMPORTANT

What are allotropes? Sketch the structure of two allotropes of carbon namely diamond and graphite. What is the impact of structure on physical properties of two allotropes?

MEDIUM
11th Assam Board
IMPORTANT
Classify following oxides as neutral, acidic, basic or amphoteric: CO,B2O3,SiO2,CO2,Al2O3,PbO2,Tl2O3. Write suitable chemical equations to show their nature.