Chemestry Test 1
The property of fluidity is absent in
Explanation: Fluidity refers to the ability of a substance to flow. Solids have a fixed shape and do not flow, so they lack the property of fluidity.
Uranium eventually decays into a stable isotope of
Explanation: Uranium decays through a series of radioactive transformations and eventually becomes a stable isotope of lead (Pb).
Nitrogen combines with metal to form
Explanation: When nitrogen combines with a metal, it typically forms a compound called a nitride. Nitride compounds contain nitrogen in the form of the nitride ion (N³⁻) and are often found in metal alloys.
Wood is the main raw materials for the manufacture of
Explanation: Wood is the main raw material used in the production of paper. It is processed into pulp, which is then turned into sheets of paper.
Which of the following is not a metallic mineral?
Explanation: Gypsum is a non-metallic mineral. It is primarily used in the production of plaster, wallboard, and cement. The other minerals listed—Limonite, Bauxite, and Haematite—are metallic minerals.
The law of Octaves is due to
Explanation: John Newlands, an English chemist, proposed the law of Octaves in 1864. He observed that when elements were arranged in order of increasing atomic mass, every eighth element had similar properties, resembling a musical octave. This led to the development of the periodic law, which later influenced the periodic table.
Glass is made from the mixture of