Chemistry Quiz 6

Water hyacinth (Eichhornia crassipes) is used for cleansing polluted water bodies owing to its remarkable capacity of absorbing pollutants.

The graphite bricks act as a moderator. They reduce the speed of neutrons and allow a nuclear reaction to be sustained.

The four common radioactive elements are Uranium, Radium, Polonium, Thorium, etc. Radioactive elements are made up of atoms whose nuclei are unstable and give off atomic radiation as part of a process of attaining stability. The emission of radiation transforms radioactive atoms into another chemical element, which may be stable or maybe radioactive such that it undergoes further decay.

Wax used for making candles is chemically a mixture of aliphatic hydrocarbons. This means that it's composed of compounds with a carbon backbone and hydrogen atoms that dangle off of the backbone. An aliphatic compound or aliphatic hydrocarbon contains hydrogen and carbon atoms linked together in straight chains.

Magnalium is an aluminium alloy with 5% magnesium and 95% aluminium.

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.

Noble gas (also called inert gases) is any of the seven chemical elements that exhibit great stability and extremely low reaction rates. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og). Hydrogen is not a noble gas.

Ammonal is an explosive made up of aluminium powder and ammonium nitrate. The mixture is often referred to as Tannerite, which is a brand of ammonal.

German Silver is an alloy of copper (60%), zinc (20%) and nickel (20%). It is used for making daily utensils and jewellery.

Cadmium does not react with water to produce Hydrogen. The alkali metals (Li, Na, K, Rb, Cs, and Fr) are the most reactive metals in the periodic table - they all react vigorously or even explosively with cold water, resulting in the displacement of hydrogen.