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प्रश्न
State if the following element or radical is divalent?
Dichromate
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उत्तर
Dichromate element or radical is divalent.
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संबंधित प्रश्न
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.
Fill in the following blank with suitable word:
A potassium ion has positive charge because it contains less............... than.....................
An element X has a valency of 2. Write the simplest formula for bromide of the element.
A particle X has 17 protons, 18 neutrons and 18 electrons. This particle is most likely to be :
Give example.
Bivalent acidic radicals
Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compound.
Chromium sulphate
Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compound.
Stannic phosphate
Fill in the blank:
A radical with one atom of sulphur and three atoms of oxygen are __________.
Name the following:
The radical containing one nitrogen and four hydrogen atoms.
