Name the element which is in (i) First group and third period (ii) Seventeenth group and second peri

Arrange the following elements in the increasing order of their metallic character Mg, Ca, K

If an element X is placed in group 14, what will be the formula and the nature of bonding of its chl

Write the formulae of chlorides of Eka-silicon and Eka-aluminium, the elements predicted by Mendelee

How many vertical columns are there in the Modern Periodic Table?

Define groups in periodic table.

What was the drawback of the Law of Octaves?

State Newlands' Law of Octaves.

State Mendeleev's Periodic Law. [CBSE 2019]

What was Dobereiner's basis of classifying elements?

Most Important Questions from Surface Chemistry - CBSE XII

Most important questions from Coordination Compounds - XII CBSE

Most important questions from Alcohol, Phenol and Ethers - XII CBSE

Top 10 Question for CBSE Board Exam - 01, Class XII CBSE Chapter – Solution

Top 10 Question for CBSE Board Exam - 02 Chapter - Solid State

Top 10 Question for Board Exam - 01 Chapter - Solid State

Concentrated nitric acid used in laboratory work is 68% nitric acid by mass in aqueous solution.....

Explain the mechanism of the cleaning action of soaps.

What change will you observe if you test soap with litmus paper (red and blue)?

Explain the formation of scum when hard water is treated with soap?