Which of the following metal is not manufactured by electrolysis
Which of the following metal is not manufactured by electrolysis Options (a) Na (b) Mg (c) Al (d) Fe Correct…
7 years ago
Chemistry
For which one of the following minerals, the composition given is incorrect
For which one of the following minerals, the composition given is incorrect Options (a) Glauber's salt - Na₂SO₄.10H₂O (b) Borax…
7 years ago
The following composition is known as “Bordeaux mixture”.
The following composition is known as "Bordeaux mixture". Options (a) Borax and copper sulphate (b) Orthoboric acid and ferrous sulphate…
7 years ago
Dead burnt plaster is
Dead burnt plaster is Options (a) CaSO₄.2H₂O (b) MgSO₄.7H₂O (c) CaSO₄.1/2H₂O (d) CaSO₄ Correct Answer: CaSO₄Explanation:No explanation available. Be the…
7 years ago
When a standard solution of NaOH is left in air for a few hours
When a standard solution of NaOH is left in air for a few hours Options (a) a precipitate will form…
7 years ago
Which of the following materials is used in high temperature thermometers
Which of the following materials is used in high temperature thermometers Options (a) Crystalline sodium chloride (b) Molten aluminium (c)…
7 years ago
As the alkaline earth metals (except Be) tend to lose their valence electrons
As the alkaline earth metals (except Be) tend to lose their valence electrons readily they act as Options (a) weak…
7 years ago
The process used for the extraction of sodium is called
The process used for the extraction of sodium is called Options (a) Serpeck's process (b) Baeyer's process (c) Down's process…
7 years ago
The substance that causes temporary hardness in water is
The substance that causes temporary hardness in water is Options (a) CaCO₃ (b) MgCO₃ (c) CaSO₄ (d) Mg(HCO₃)₂ Correct Answer:…
7 years ago
The increasing order of atomic radius for the elements Na, Rb, K and Mg is
The increasing order of atomic radius for the elements Na, Rb, K and Mg is Options (a) Na < K…
7 years ago