Periodic Properties And Variation Of Properties Physical And Chemical — Chemistry STD 10 — Question

What are insoluble impurities called which are left behind in dissolving bauxite?

In a non-polar covalent compound, the shared pair of electrons are:

A gas commonly used for ripening raw fruit is:

The atomic radius of the elements decreases across period 3. Which of the following statements explain(s) this phenomenon?
1. Electrons shells are added across Period 3 which increases the nuclear force of attraction.
2. The nuclear charge increases across Period 3 due to increasing atomic number.
3. There is a greater force of attraction between the nucleus and the electrons.

Amongst the following which is not a polar covalent compound?

Choose the correct option :
The metal other than aluminium, which has a strong affinity for oxygen is:

When sodium carbonate solution is added to limewater, the colour of ppt is:

Element X is found in Group 17th of the periodic table.
Which of the following properties are typically exhibited by the element X?

While preparing dilute sulphuric acid, conc. H₂SO₄ is added into water because :