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प्रश्न
Match the formulas of the following of bases with their correct names.
Bases – (a) NaOH (b) KOH (c) Ca(OH)2 (d) Zn(OH)2
Names – (1) Potassium hydroxide (2) Zinc hydroxide (3) Aluminium hydroxide (4) Calcium hydroxide (5) Sodium hydroxide
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उत्तर
| Names | Bases | ||
| (1) | Potassium hydroxide | (b) | KOH |
| (2) | Zinc hydroxide | (d) | Zn(OH)2 |
| (3) | Calcium hydroxide | (c) | Ca(OH)2 |
|
(4) |
Sodium hydroxide | (a) | NaOH |
संबंधित प्रश्न
Fill in the blank:
Symbolic expression for a molecule is called _____.
Match the non-metallic elements – with their correct symbols. Non-metallic elements are:
| Non-Metallic elements | Symbol |
| (a) Carbon | (1) O |
| (b) Chlorine | (2) I |
| (c) Oxygen | (3) Si |
| (d) Phosphorus | (4) C |
| (e) Hydrogen | (5) Cl |
| (f) Nitrogen | (6) P |
| (g) Iodine | (7) F |
| (h) Bromine | (8) H |
| (i) Fluorine | (9) S |
| (j) Silicon | (10) Br |
| (k) Sulphur | (11) N |
Match the symbols of – radicals – with their correct combining power or capacity, (valency).
(a) OH
(b) So4
(c) No3
(d) Co3
Combining power or capacity – A : 3; B : 2; C : 1. (negative valencies)
In the chemical word equation – Zinc + Sulphuric acid → Zinc sulphate + Hydrogen
The molecular equation is :
Zn + H2SO4 → ZnSO4 + H2[g].
State what [g] represents.
Give the symbol of the following element:
Lead
State the type of element for the following:
Arsenic
State the type of element for the following:
Sodium
Give the formula of the following acid:
Nitric
State a reason why the symbol of calcium is ‘Ca’ and of copper is ‘Cu’
What does a chemical symbol represent?
