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Write symbols of the following elements and the radicals obtained from them and indicate the charge on the radicals. Mercury, potassium, nitrogen, copper, sulphur, carbon, chlorine, oxygen - Science and Technology

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प्रश्न

Write symbols of the following elements and the radicals obtained from them and indicate the charge on the radicals.

Mercury, potassium, nitrogen, copper, sulphur, carbon, chlorine, oxygen

थोडक्यात उत्तर
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उत्तर

sr. no.

Element

Symbols Free radicals charge on the radicals
i. Mercury Hg Hg+ +1
Hg2+ +2
ii. Potassium K K+ +1
iii. Nitrogen N N3- -3
iv. Copper Cu Cu+ +1
Cu2+ +2
v. Sulphur S S2- -2
vi. Carbon C C+ +1

vii.

Chlorine

Cl Cl- -1
viii. Oxygen O O2- -2
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पाठ 4: Measurement of Matter - Exercise [पृष्ठ ५७]

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बालभारती Science and Technology [English] 9 Standard Maharashtra State Board
पाठ 4 Measurement of Matter
Exercise | Q 2. | पृष्ठ ५७

संबंधित प्रश्‍न

Name the following radicals :

HC03


Write the names of `"ZnCl"_2 ` compounds :


Magnesium and oxygen combine in the ratio of 3 : 2 by mass to form magnesium oxide. What mass of oxygen gas would be required to react completely with 24 g of magnesium ?


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.

Fill in the following blank with suitable word:

A potassium ion has positive charge because it contains less............... than.....................


A particle P has 18 electrons, 20 neutrons and 19 protons. This particle must be :


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

Ion Valency (Charge) Ion Valency (Charge)
Sodium ion 1+ Bromide ion 1–
Ammonium ion 1+ Hydroxide ion 1–
Calcium ion 2+ Sulphate ion 2–
Lead ion 2+ Phosphate ion 3–


Using this information, write down the formulae of the following compounds :
(i) Sodium phosphate
(ii) Ammonium sulphate
(iii) Calcium hydroxide
(iv) Lead bromide 


What do you understand by the following terms?

Basic radical


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

Calcium silicate


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

Potassium ferrocyanide


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

Stannic phosphate


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

Potassium manganate


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

Nickel bisulphate 


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


Fill in the blank:

A radical with one atom of sulphur and three atoms of oxygen are __________.


State if the following element or radical is divalent?

Chromium


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