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प्रश्न
Potassium (at No.19) and chlorine (at No.17) react to form a compound. Explain the formation of the compound on the basis of oxidation.
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उत्तर
\[\ce{2K + Cl2 → 2KCl}\]
In the electronic concept, oxidation is a process in which an atom or ion loses an electron(s).
\[\ce{K → K+ + e-}\]
संबंधित प्रश्न
Elements A, B and C have atomic number 17, 19 and 10 respectively.
State which one is a non-metal.
Match the atomic number 4, 8, 14, 15 and 19 with each of the following:
(a) A solid non-metal of valelncy 3.
(b) A gas of valency 2.
(c) A metal of valency 1.
(d) A non-metal of valency 4
Give electron dot diagram of the following:
methane
Explain the following briefly:
Helium does not form He2 molecule
Separate the following compounds into three categories - ionic, polar and covalent compounds; N2, NH4Cl, NH3, NO, NH4NO3, NCl3.
The following table shows the electronic configuration of the elements W, X, Y, Z:
|
Element |
W |
X |
Y |
Z |
|
Electronic |
2,8,1 |
2,8,7 |
2,5 |
1 |
Answer the following questions based on the table above:
What is the formula of the compound formed between X and Z.
How many atoms of each kind are present in the following molecules: calcium oxide, chlorine, water, carbon tetrachloride?
How many electrons are required by each atom mentioned in (a) to attain the nearest noble gas configuration?
Name an element which does not contain neutron.
Explain
Octet rule for the formation of sodium chloride
Complete the following table relating to the atomic structure of some elements.
|
Element Symbol |
Atomic Number |
Mass Number |
Numbers of neutrons |
Number of Electrons |
Number of Protons |
|
Li |
3 |
6 |
|
|
|
|
Cl |
17 |
|
20 |
|
|
|
Na |
|
|
12 |
|
11 |
|
Al |
|
27 |
|
|
13 |
|
S |
|
32 |
16 |
|
|
State the type of bonding in the following molecules.
Calcium oxide
Explain the following:
Carbon-12 and carbon-14 both show similar chemical properties.
The element that would form anion by gaining electrons in a chemical reaction is ______.
The valency of noble gases is ______.
______ is the only noble gas that does not have eight electrons in its valence shell.
Spot the error/correct the wrong statement:
In the formation of compounds, the inner shell electrons of an atom involved in bonding.
| Name of compound | Type of compound | |
| a. | Sodium chloride | ______ |
| b. | ______ | co-ordinate covalent compound |
| c. | Methane | ______ |
| d. | Fluorine molecule | ______ |
How many electrons are required or released by each atom in water molecule to attain the nearest noble gas configuration?
Elements A, B and C have atomic number 17, 19 and 10 respectively.
Write down the formula of the compound formed by two of the above elements.
