Explanation

Nitric acid (HNO₃) is a strong inorganic acid commonly used in fertilizers and explosives.

The turmeric, tartaric, and citric acids are organic acids found in plants or fruits.

Explanation

Carbon monoxide (CO) is a colorless, odorless gas produced by incomplete combustion in gas heaters.

It is highly toxic.

It can cause death when inhaled in large amounts.

Explanation

Methane reacts with oxygen to produce carbon dioxide and water, releasing heat.

This is a combustion reaction, typical for hydrocarbons burning in oxygen.

Explanation

Balancing the equation requires equal atoms of each element on both sides.

Here, 2 molecules of KNO₃ decompose into 2 molecules of KNO₂ and 1 molecule of O₂ gas.

Explanation

In a suspension, the solute particles are large enough to be seen with the naked eye and are not completely dissolved in the solvent.

The solute particles can eventually settle at the bottom if left undisturbed.

Explanation

Smog is formed when pollutant gases like nitrogen oxides and hydrocarbons react in sunlight (photochemical reaction).

It creates a thick, hazy air harmful to health, especially in urban areas.

Explanation

Dry ice sublimation is a physical change where solid CO₂ directly turns into gas without changing its chemical composition.

Rusting of iron, burning of wood, and cooking of egg are all chemical changes, where new substances are formed.

Explanation

Cobalt chloride paper is used to detect moisture; it turns from blue to pink in the presence of water vapor.

This change helps demonstrate transpiration as water evaporates from the leaf surface.

Explanation

Reforming is a process used in petroleum refining to separate hydrogen from hydrocarbons through heat.

It helps convert lower-quality hydrocarbons into more valuable products like gasoline and hydrogen.

Explanation

Neon (Ne) has an atomic number of 10, which places it in the 2nd period of the periodic table.

Periods indicate the number of electron shells; Neon has 2 shells.