Chemistry Quiz 6

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.

The fuel used in an atomic reactor is Uranium. Uranium is the most widely used fuel by nuclear power plants for nuclear fission.

Oxygen is the most abundant element in the human body accounting for approximately 65% of a person's mass. Each water molecule consists of two hydrogen atoms bonded to one oxygen atom, but the mass of each oxygen atom is much higher than the combined mass of the hydrogen.

Cadmium is not a radioactive element. Uranium, Thorium and Radium are radioactive elements.

The most suitable vessel for storing concentrated sulphuric acid (H₂SO₄) is a glass vessel as it is not able to dissolve glass. This is because sulfuric acid is simply not corrosive enough to eat through the extremely strong silicon dioxide (SiO₂) bonds that are the main component found in glass.

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.

Transboundary pollution is the pollution that originates in one country but is able to cause damage to another country's environment, by crossing borders through pathways like water or air. It is caused by a chemical reaction that begins when compounds like sulphur dioxide (SO₂) and nitrogen oxides (NO_x) are released into the air. Acid rain is an example of Transboundary pollution.

When formaldehyde and potassium hydroxide (KOH) are heated, we get methyl alcohol and potassium formate. This reaction is known as the Cannizzaro reaction. In Cannizzaro's reaction, one substance is oxidized and the other is reduced.

2HCHO+KOH → HCOOK+CH₃OH.
Thus in this reaction, methyl alcohol (CH₃OH) is produced. This reaction is known as Cannizaro's reaction

In a lead-acid battery, the cathode is made of lead dioxide, and the anode is made of metallic lead. The two electrodes are separated by an electrolyte of sulfuric acid.

The process involved in the industrial production of vegetable ghee is reduction. Vegetable ghee is made from cooking oil by hydrogenation. Hydrogenation reaction of unsaturated fatty acids is basically the reaction where the hydrogen gets added in the double bond of the alkene or alkyne in presence of nickel. Nickel acts like a catalyst in solid-state.