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प्रश्न
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)
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उत्तर
(a) OH — Valency- 1 (C)
(b) So4 — Valency- 2 (B)
(c) No3 — Valency- 1 (C)
(d) Co3 — Valency- 2 (B)
संबंधित प्रश्न
Give two examples of the following:
Solid + Liquid mixture
An atom of an element is denoted by a “symbol”. Explain the meaning of the term ‘symbol’. State a reason for representing the following element by its symbol.
Hydrogen by ‘H’
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
State the type of element for the following:
Iodine
Write the radical of the following valency:
Sodium
Write the radical of the following valency:
Chlorine [Chloride]
Give the formula of the following acid:
Nitric
Name three metals whose symbols are derived: from their Latin names.
What does the symbol '(aq.)' present in a chemical equation, mean?
Write the symbols for the following elements and classify them as solid, liquid and gas. Aluminum, Carbon, Chlorine, Mercury, Hydrogen and Helium
