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प्रश्न
State whether the following statements are true or false:
A sodium ion has positive charge because it has more protons than a neutral atom.
उत्तर
False. A sodium ion carries a positive charge because it has less number of electrons than a neutral atom.
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संबंधित प्रश्न
How many atoms are present in a PO43− ion?
A liquid compound X of molecular mass 18 u can be obtained from a number of natural sources. All the animals and plants need liquid X for their survival. When an electric current is passed through 200 grams of pure liquid X under suitable conditions, then 178 grams of gas Y and 22 grams of gas Z are produced. Gas Y is produced at the positive electrode whereas gas Z is obtained at the negative electrode. Moreover, gas Y supports combustion whereas gas Z burns itself causing explosions.
- Name (i) liquid X (ii) gas Y, and (iii) gas Z.
- What is the ratio of the mass of element Z to the mass of element Y in the liquid X ?
- Which law of chemical combination is illustrated by this example ?
- Name two sources of liquid X.
- State an important use of Y in our life.
Give example.
Basic radicals
Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compound.
Potassium ferrocyanide
Fill in the blank:
Sodium chloride has two radicals. Sodium is a _____ radical while chloride is _____ radical.
State if the following element or radical is divalent?
Lithium
State if the following element or radical is divalent?
Ammonium
State if the following element or radical is divalent?
Nitride
State if the following element or radical is divalent?
Chromium
State if the following element or radical is divalent?
Bisulphite
