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
S and Some P Block Elements
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
Limestone is not used in which of the following manufacturing processes
Limestone is not used in which of the following manufacturing processes Options (a) Phosphorus from phosphorite (b) Ordinary (soda lime)…
7 years ago
The s-block element used as a catalyst in the manufacture of Buna-S rubber is
The s-block element used as a catalyst in the manufacture of Buna-S rubber is Options (a) Mg (b) Ca (c)…
7 years ago
For alkali metals, which one of the following trends is incorrect
For alkali metals, which one of the following trends is incorrect Options (a) Hydration energy: Li > Na > K…
7 years ago
The characteristic not related to alkali metals is
The characteristic not related to alkali metals is Options (a) their ions are isoelectronic with noble gas (b) low melting…
7 years ago