Chemistry Quiz 6

Hydrogen bomb is based on the principle of uncontrolled fusion reaction. A hydrogen bomb (also called thermonuclear bomb) is an uncontrolled fusion reaction in which enormous amounts of energy are released.

Major gaseous pollutant of the thermal power station is SO₂. Coal thermal power plants contribute to over half sulphur dioxide (SO₂) concentration, 30 percent oxides of nitrogen (NO_x), and 20 percent particulate matter (PM) in the ambient air.

Ethylene glycol is added to aviation gasoline because it prevents the freezing of petrol. It is an organic compound and has a low freezing point. In the US and Latin countries, the term gasoline is used, but in Europe and Asian countries, it's called petrol.

Zinc is used to galvanise iron. Galvanizing is a process of coating iron or steel with zinc in order to provide greater protection against corrosion for the iron or steel base.

The chemical name of 'Common salt' is Sodium chloride. Sodium chloride is an ionic compound with the chemical formula NaCl, representing a 1:1 ratio of sodium (Na⁺) and chloride (Cl^–) ions.

When a drop of glycerol is added to crushed KMnO₄ spread on a paper, the paper will ignite. As the glycerin comes in contact with the KMnO₄, the oxidizing properties of the permanganate ion come into play with the glycerin. The oxidation of the glycerin is very exothermic and after a few seconds, the released heat causes the glycerin to also ignite and burst into flame.

The chemical name for baking soda is sodium bicarbonate (NaHCO₃). It is a salt composed of a sodium cation and a bicarbonate anion.

When a gas is expanded from a high-pressure region to a low-pressure region; temperature change occurs. This phenomenon is related to the Joule-Thomson effect. The inversion temperature of hydrogen is low thus it shows heating effect (increase in temperature) when it expands adiabatically from high pressure into a region of low pressure.

Silver is not present in German silver. German Silver is an alloy of copper (60%), zinc (20%) and nickel (20%). It is named for its silver-white colour. It is used for making daily utensils and jewellery.

Galena is a lead sulfide mineral with a chemical composition of PbS. It is the primary ore of lead and is often mined for its silver content.