Give reason as to why:

The oxidising power of element increases on moving from left to right along a period in the period in the periodic table.

Given reason as to why:

Hydrogen chloride can be termed as a polar covalent compound?

Choose the correct answer from the option given below:

The brown ring test is used for detection of :

• CO₃^2-

• NO₃^-

• SO_­3^2-

• SO_­3^2-

Give the number of the group and the period, of the element having three shells with three electrons in the valence shell.

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The unsaturated hydrocarbon undergoes:

• A substitution reaction

• An oxidation reaction

• An addition reaction

• An addition reaction

Choose the correct answer from the options given below:

When dilute sulphuric acid reacts with iron sulphide, the gas evolved is ………

• Hydrogen sulphide

• Sulphur dioxide

• Sulphur trioxide

• Sulphur trioxide

By drawing an electron dot diagram, show the lone pair effect leading to the formation of ammonium ion from ammonia gas and hydrogen ion.

Choose the correct answer from the options given below:

Hydrogen chloride gas being highly soluble in water is dried by:

• Anhydrous calcium chloride

• Phosphorous penta oxide

• Quick lime 

• Quick lime 

choose the correct answer from the options given below:’

The functional group present in acetic acid is:

• Ketonic C=O

•  Hydroxyl –OH

• Aldehyde –CHO    

• Aldehyde –CHO    

Choose the correct answer from the options given below.
The number of C-H bond in ethane molecule are:

• Four

• Six

• Eight

• Eight