SSLC (English Medium) Class 9 - Tamil Nadu Board of Secondary Education Question Bank Solutions

Complete the following equation.

Zn + ______ → Na₂ZnO₂ + H₂ ↑

Complete the following equation.

CaO + H₂SO₄ → ______ + H₂O

Complete the following equation.

HCl + ______ → NaCl + H₂O

Complete the following equation.

Ca(OH)₂ + ______ → ______ + H₂O

Why does blue color copper sulphate become white on heating?

Acidic or basic solutions are good conductors of electricity. Justify your answer.

To Interpret:

CH₄ and NH₃, are not acids.

Match the following:

Explain the carbon cycle or biogeochemical cycle.

What is carbon monoxide? Why is it toxic?

Carbon is one of the most important ______ elements.

The main component of water gas is ______.

The ability of carbon to form ______ is the main reason for the formation of various classes of carbon compounds.

Elemental carbon undergoes ______ reaction at room temperature.

Carbon monoxide displaces ______ from hemoglobin. 

According to the Octet rule, carbon requires ______ electrons to attain the nearest noble gas.

Which among the following compound is soluble in water?

Which of the following is highly toxic?

______ is the main constituent of coal. 

The carbon cycle is the ______ cycle.