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

A large family of fullerene exists, starting at ______ and ______ reaching up to. 

Cigarette smoking is a source of ______.

Carbon monoxide enters the human body through ______.

About 18% of the weight of the human body is carbon.

There is more abundance of carbon on the earth.

Assertion (A): Carbon monoxide is a toxic gas of carbon.
Reason (R): smoking is a source of carbon monoxide.

Answer the following by rearranging the jumbled letters :

Organic compounds having a double bond between carbon atoms are

knelaes

Answer the following by rearranging the jumbled letters :

The reaction of carbon with oxygen gives osdiex

Answer the following by rearranging the jumbled letters :

In this molecule, carbon is attached to four hydrõgen atoms.
emathen.

Answer the following by rearranging the jumbled letters :

Carbon combines with other elements through the _______ bond.
lnaocvet.

Which theory was challenged by the synthetic preparation of Urea?

How many valence electrons are there in carbon?

Why is carbon monoxide harmful to health? (or) What happens when we breathe Carbon monoxide?

Isotopes are atoms with a different number of ______.

The chromophore and autochrome theory was proposed by ______.

What is called Applied Chemistry?

Explain very briefly about various fields of Applied Chemistry.

______ acts as a thermoregulatory organ.

What is homeostasis?

There are ______ essential amino acids required by the human body through the diet.