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

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.

______ is a fluid-filled body cavity.

Which organism is called Friends of farmers? Why?

Name the two types of sclerenchyma cells.

Differentiate fibers from sclereids.

______ is the smallest gland.

Gastric glands do not secrete ______.

Proteins are polymer chains made of Amino acids linked together by Peptide bonds.

Prions do not contain ______.