Advertisements
Advertisements
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 reducing agent.
Advertisements
उत्तर
\[\ce{2K + Cl2 -> 2KCl}\]
A reducing agent reduces other substances either by providing electrons, hydrogen, or an electropositive ion or by removing oxygen or an electronegative ion.
\[\ce{K -> K+ + e-}\]
संबंधित प्रश्न
Give electron dot diagram of the following:
methane
State differences between the properties of ionic compounds and covalent compounds.
What type of bond is formed between two atoms, when the electronegative difference between them is High ?
What type of bond is formed between two atoms, when the electronegative difference between them is zero?
Element X is a metal with a valency 2; Y is a non-metal with a valency 3.
(a) Write an equation to show how Y forms as ion
(b) If Y is a diatomic gas, write an equation for the direct combination of X and Y to form a compound.
An element with the atomic number 19 will most likely combine chemically with the element whose atomic number is
State the following is a reduction reaction or oxidation reaction.
\[\ce{Pb -> Pb^2+ + 2e-}\]
State the following is a reduction reaction or oxidation reaction.
\[\ce{A^3+ + e- -> A^2+}\]
How are X-rays produced?
Five atoms are labeled A to E
|
Atoms |
Mass No |
Atomic No. |
|
A |
40 |
20 |
|
B |
19 |
9 |
|
C |
7 |
3 |
|
D |
16 |
8 |
|
E |
14 |
7 |
(a) Which one of these atoms:
(i) contains 7 protons
(ii) has electronic configuration 2,7
(b) Write down the formula in the compound formed between C and D
(c) Predict : (i) metals (ii) non-metals
Name the following:
Metal with valency 2
Give reason
`""_17^35"CI"` and `""_17^37"CI"` do not differ in their chemical reactions.
What do you understand by redox reactions?
Potassium (at No.19) and chlorine (at No.17) react to form a compound. Explain the formation of the compound on the basis of oxidizing agent.
\[\ce{^24_12Mg}\] and \[\ce{^26_12Mg}\] are symbols of isotopes of magnesium.
(a) Compare the atoms of these isotopes with respect to :
i. the composition of their nuclei
ii. their electronic configurations
(b) Give reasons why the two isotopes of magnesium have different mass numbers.
Identify the following reaction as either oxidation or reduction:
Fe3+ + e- → Fe2+
Identify the following reaction as either oxidation or reduction:
Zn → Zn2+ + 2e-
Five atoms are labelled V to Z
| Atoms | Mass Number | Atomic Number |
| V | 40 | 20 |
| W | 19 | 9 |
| X | 7 | 3 |
| Y | 16 | 8 |
| Z | 14 | 7 |
- Which one of these atoms
(1) contains 7 protons;
(2) has an electronic configuration 2, 7? - Write down the formula of the compound formed by atoms X and Y.
Draw the geometric atomic structure of the three isotopes of hydrogen and the two isotopes of chlorine.
How many atoms of each kind are present in the following molecule:
carbon tetrachloride
