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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Write the Names of Hgo Compounds :

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प्रश्न

Write the names of `"HgO"` compounds :

एका वाक्यात उत्तर
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उत्तर

`HgO`  - Mercuric Oxied 

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पाठ 4: Atoms, Molecules and Radicals - Exercise

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सेलिना Concise Chemistry [English] Class 7 ICSE
पाठ 4 Atoms, Molecules and Radicals
Exercise | Q 8.6

संबंधित प्रश्‍न

How many atoms are present in a PO43− ion?


State whether the following statements are true or false:

A sodium ion has positive charge because it has more protons than a neutral atom.


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:

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


The valencies (or charges) of some of the ions are given below :

Ion            Valency        Ion                Valency                        (Charge)                             (Charge)

Sodium ion       1+      Nitrate ion            1–  
Copper ion       2+       Sulphide ion         2–

Using this information, write down the formulae of :

  1. Sodium sulphide
  2. Copper nitrate

Give example.

Composite radicals


Give example.

Trivalent basic radicals


State if the following element or radical is divalent?

Nickel


Match the names of ions and radicals from 1 to 10 with their correct answer from A to Q.

Column A Column B
1. Hypochlorite A: Hg2+
2. Permanganate B: \[\ce{MnO_4^1-}\]
3. Plumbous C: Sn4+
4. Zincate D: Pb2+
5. Nitride E: Sn2+
6. Mercuric F: Pb4+
7. Stannic G: \[\ce{SO_3^2-}\]
8. Nitrite H: N3-
9. Sulphite I: \[\ce{NO_2^1-}\]
10. Dichromate J: \[\ce{MnO_4^2-}\]
  K: Hg1+
L: \[\ce{SO_4^2-}\]
M: CIO1-
N: \[\ce{ZnO_2^2-}\]
O: \[\ce{Cr_2O_7^2-}\]
P: \[\ce{CrO_4^2-}\]
Q: \[\ce{ClO_3^1-}\]

Atoms that carry positive or negative charges are called ______.


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