हिंदी
सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Write the Names of Hgo Compounds :

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प्रश्न

Write the names of `"HgO"` compounds :

एक पंक्ति में उत्तर
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उत्तर

`HgO`  - Mercuric Oxied 

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अध्याय 4: Atomic Structure - Exercise

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एस पी सिंग Concise Chemistry [English] Class 7 ICSE
अध्याय 4 Atomic Structure
Exercise | Q 8.6

संबंधित प्रश्न

Name the following radicals :

SO42


Write the names of `"CuCo"_3` 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.

  1. Name (i) liquid X (ii) gas Y, and (iii) gas Z.
  2. What is the ratio of the mass of element Z to the mass of element Y in the liquid X ?
  3. Which law of chemical combination is illustrated by this example ?
  4. Name two sources of liquid X.
  5. State an important use of Y in our life.

Define ‘formula mass’ of a compound.


Fill in the following blank with suitable word:

The particle which is formed by the loss of electrons by an atom is called..............


Fill in the following blank with suitable word:

A sulphide ion has negative charge because it contains less ....................... than ...................


An element X has a valency of 2. Write the simplest formula for oxide of the element.


Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compound.

Potassium ferrocyanide


State if the following element or radical is divalent?

Nitride


State if the following element or radical is divalent?

Carbide


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