SSLC (English Medium) कक्षा ९ - Tamil Nadu Board of Secondary Education Question Bank Solutions

The bond which is formed by the mutual sharing of electrons is called ______ bond.

______ is an example of a covalent compound having a high melting point.

Which of the following compound(s) possesses a high melting point?

In covalent bond formation, the sharing of ______ electrons takes place in their outermost shell.

Molecular reactions are ______ in the covalent compound.

What is a covalent bond?

Statement (A): Covalent compounds are bad conductors of electricity.
Reason (B): Covalent compounds contain charged particles (ions)

Write notes on the characteristics of covalent compounds.

The molar ratio of hydrochloric acid and nitric acid in aquaregia is ______.

The Chemical formula of aquaregia is ______.

What is Aquaregia? Mention its uses.

The arrangement of atoms in diamond is ______.

The number of free electrons in each carbon of diamond is ______.

Diamond is not a good conductor of electricity because ______.

______ structure is accountable for hardness and rigidity of the diamond.

Answer the following by rearranging the jumbled letters :

It is the hardest allotrope of carbon

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Prove that a diamond is a pure form of carbon?

Differentiate crystalline and amorphous forms of allotropes of carbon.

Antacids provide relief from the burning sensations in the stomach.

Assertion (A): After eating fruits (or) vegetables, one may feel uncomfortable due to a burning sensation.
Reason (R): The burning sensation is due to an imbalance in the acidity of the stomach.