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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Name the Following Radicals : Cr2072 - Chemistry

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प्रश्न

Name the following radicals :

Cr2072

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उत्तर

Cr2072-  = Dichromate

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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 5.4

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)


Write the names of `"HgO"` compounds :


Write the names of `"H"_2"S"` compounds :


Fill in the following blank with suitable word :

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


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


Complete the following table.

Acid Radicals `→`

 

Chloride

 

Nitrate

 

Sulphate 

 

Carbonate

 

Hydroxide

 

Phosphate

Basic Radicals `↓`

Magnesium

MgCl2

Mg(NO3)2

MgSO4

MgCO3

Mg(OH)2

 Mg3(PO4)2

Sodium

 

 

 

 

 

 

Zinc

 

 

 

 

 

 

Silver

 

 

 

 

 

 

Ammonium

 

 

 

 

 

 

Calcium

 

 

 

 

 

 

Iron (II)

 

 

 

 

 

 

Potassium

 

 

 

 

 

 


Differentiate between the following with suitable examples- A basic radical and an acid radical


Select the correct answer to the statement given below:

An elementary particle of matter – of a group of atoms of different elements behaving as a single unit with charge on the group.


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: \[\ce{ClO_3^1-}\]

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