CO₂ is obtained by heating
CO₂ is obtained by heating
Options
(a) NaHCO₃ (b) Na₂CO₃ (c) MgCO₃ (d) K₂CO₃
Correct Answer:
NaHCO₃
Explanation:
No explanation available. Be the first to write the explanation for this question by […]
Chemistry
Melting point is the higher for
Melting point is the higher for
Options
(a) Ga (b) B (c) In (d) Al
Correct Answer:
B
Explanation:
In the boron family the melting point decreases on moving down the group upto […]
Li occupies higher position in the electrochemical series of metals as compared
Li occupies higher position in the electrochemical series of metals as compared to Cu since
Options
(a) the standard reduction potential Li⁺/Li is lower than that of Cu²⁺/Cu (b) the standard reduction potential […]
Alum in dyeing of clothes is used as
Alum in dyeing of clothes is used as
Options
(a) bleaching agent (b) fire proof material (c) mordant of colour (d) diluent
Correct Answer:
mordant of colour
Explanation:
Alums are the double salts […]
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+clay
Explanation:
The essential constituents of portland cement are CaO, silica, alumina, magnesium oxide, and […]
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) zero
Correct Answer:
more than Al
Explanation:
No explanation available. Be the first […]
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 (c) limestone and silica (d) limestone and gypsum
Correct Answer:
limestone and clay
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
Correct Answer:
sodium metaaluminate
Explanation:
No explanation available. Be the first to write […]
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 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
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 […]