The constituents of porland cement are
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+clayExplanation:The essential…
7 years ago
S and Some P Block Elements
First ionization potential of Mg is
First ionization potential of Mg is Options (a) less than Al (b) equal to Al (c) more than Al (d)…
7 years ago
In the manufacture of cement which of the following is used
In the manufacture of cement which of the following is used Options (a) clay and silica (b) limestone and clay…
7 years ago
Aluminium reacts with caustic soda to form
Aluminium reacts with caustic soda to form Options (a) aluminium hydroxide (b) aluminium oxide (c) sodium metaaluminate (d) sodium tetraaluminate…
7 years ago
The hydration energy of Mg²⁺ is greater than that of
The hydration energy of Mg²⁺ is greater than that of Options (a) Na⁺ (b) Be²⁺ (c) Mg³⁺ (d) Al³⁺ Correct…
7 years ago
NaOCl is used as a bleaching agent and sterilising agent. It can be synthesized
NaOCl is used as a bleaching agent and sterilising agent. It can be synthesized by the action of Options (a)…
7 years ago
Which of the following corresponds to the electronic configuration 1s², 2s²,2p⁶
Which of the following corresponds to the electronic configuration 1s², 2s²,2p⁶,3s² Options (a) Magnesium (b) Helium (c) Argon (d) Sodium…
7 years ago
Bleaching powder is obtained by treating Cl₂ with
Bleaching powder is obtained by treating Cl₂ with Options (a) CaOCl₂ (b) CaO (c) Ca(OH)₂ solution (d) CaCO₃ Correct Answer:…
7 years ago
Gas A is bubbled through slacked lime, a white precipitate is formed.
Gas A is bubbled through slacked lime, a white precipitate is formed. On prolonged bubbling the precipitate is dissolved. On…
7 years ago
The number of hydroxide ions produced by one molecule of sodium carbonate
The number of hydroxide ions produced by one molecule of sodium carbonate (Na₂CO₃) on hydrolysis is Options (a) 3 (b)…
7 years ago