When a standard solution of NaOH is left in air for a few hours
Options
(a) a precipitate will form (b) strength will decrease (c) strength will increase (d) the concentration of Na⁺ […]
Which of the following materials is used in high temperature thermometers
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(a) Crystalline sodium chloride (b) Molten aluminium (c) Sodium amalgam (d) Alloy of sodium and potassium
Correct Answer:
Alloy of sodium […]
As the alkaline earth metals (except Be) tend to lose their valence electrons readily they act as
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(a) weak oxidising agent (b) weak reducing agent (c) strong oxidising agent (d) strong reducing […]
The process used for the extraction of sodium is called
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(a) Serpeck’s process (b) Baeyer’s process (c) Down’s process (d) Thermite process
Correct Answer:
Down’s process
Explanation:
No explanation available. Be the […]
The substance that causes temporary hardness in water is
Options
(a) CaCO₃ (b) MgCO₃ (c) CaSO₄ (d) Mg(HCO₃)₂
Correct Answer:
Mg(HCO₃)₂
Explanation:
No explanation available. Be the first to write the explanation for […]
The increasing order of atomic radius for the elements Na, Rb, K and Mg is
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(a) Na < K < Mg < Rb (b) K < Na < Mg < Rb (c) […]
Limestone is not used in which of the following manufacturing processes
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(a) Phosphorus from phosphorite (b) Ordinary (soda lime) glass (c) Iron from haematite (d) Solvay process of sodium carbonate
Correct Answer: […]
The s-block element used as a catalyst in the manufacture of Buna-S rubber is
Options
(a) Mg (b) Ca (c) Ba (d) Na
Correct Answer:
Na
Explanation:
No explanation available. Be the first […]
For alkali metals, which one of the following trends is incorrect
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(a) Hydration energy: Li > Na > K > Rb (b) Ionization energy: Li > Na > K > Rb (c) […]
The characteristic not related to alkali metals is
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(a) their ions are isoelectronic with noble gas (b) low melting point (c) low electronegativity (d) higher ionisation energy
Correct Answer:
higher ionisation energy
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