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प्रश्न
State whether the following statements are true or false :
A chloride ion has negative charge because it has more electrons than a neutral atom.
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उत्तर
True. A chloride ion carries a negative charge because it has more electrons than a neutral atom.
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संबंधित प्रश्न
Calculate the number of aluminium ions present in 0.051 g of aluminium oxide.
(Hint: The mass of an ion is the same as that of an atom of the same element. Atomic mass of Al = 27 u)
Name the following radicals :
HC03
The valency of calcium is 2. Write the valencies of other radical in the following :
- CaO
- Ca(OH)2
- CaC03
- CaCl2
Write the names of `"HgO"` compounds :
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.
Define ‘formula mass’ of a compound.
What is the name of a particle which contains 10 electrons, 11 protons and 12 neutrons ?
Name the particle which has 18 electrons, 18 neutrons and 17 protons in it.
An element X has a valency of 2. Write the simplest formula for bromide of the element.
State if the following element or radical is divalent?
Permanganate
