The constituents of porland cement are
Options
(a) CaCO₃+clay+sand (b) CaCO₃+aluminium silicate (c) CaCO₃+clay+SiO₂ (d) CaCO₃+gypsum+clay
Correct Answer:
CaCO₃+gypsum+clay
Explanation:
The essential constituents of portland cement are CaO, silica, alumina, magnesium oxide, and […]
First ionization potential of Mg is
Options
(a) less than Al (b) equal to Al (c) more than Al (d) zero
Correct Answer:
more than Al
Explanation:
No explanation available. Be the first […]
In the manufacture of cement which of the following is used
Options
(a) clay and silica (b) limestone and clay (c) limestone and silica (d) limestone and gypsum
Correct Answer:
limestone and clay
Aluminium reacts with caustic soda to form
Options
(a) aluminium hydroxide (b) aluminium oxide (c) sodium metaaluminate (d) sodium tetraaluminate
Correct Answer:
sodium metaaluminate
Explanation:
No explanation available. Be the first to write […]
The hydration energy of Mg²⁺ is greater than that of
Options
(a) Na⁺ (b) Be²⁺ (c) Mg³⁺ (d) Al³⁺
Correct Answer:
Na⁺
Explanation:
Hydration energy depends on charge of ion and ionic radius. […]
NaOCl is used as a bleaching agent and sterilising agent. It can be synthesized by the action of
Options
(a) NaCl with H₂O (b) NH₄Cl with NaOH (c) Cl₂ with cold and dilute […]
Which of the following corresponds to the electronic configuration 1s², 2s²,2p⁶,3s²
Options
(a) Magnesium (b) Helium (c) Argon (d) Sodium
Correct Answer:
Magnesium
Explanation:
No explanation available. Be the first to write […]
Bleaching powder is obtained by treating Cl₂ with
Options
(a) CaOCl₂ (b) CaO (c) Ca(OH)₂ solution (d) CaCO₃
Correct Answer:
Ca(OH)₂ solution
Explanation:
No explanation available. Be the first to write the explanation […]
Gas A is bubbled through slacked lime, a white precipitate is formed. On prolonged bubbling the precipitate is dissolved. On heating the resultant solution, the white precipitate reappeares with evolution of gas B. The gases […]
The number of hydroxide ions produced by one molecule of sodium carbonate (Na₂CO₃) on hydrolysis is
Options
(a) 3 (b) 1 (c) 4 (d) 2
Correct Answer:
2
Explanation:
No explanation available. Be […]
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