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प्रश्न
State the following is a reduction reaction or oxidation reaction.
\[\ce{Pb -> Pb^2+ + 2e-}\]
उत्तर
Oxidation Reaction.
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संबंधित प्रश्न
Five atoms are labelled from 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 an electronic configuration 2, 7?
(b) Write down the formula of the compound formed between C and D.
(c) predict which are: (i) metals, (ii) non-metals?
State differences between the properties of ionic compounds and covalent compounds.
Explain the following briefly:
Helium does not form He2 molecule
What type of bond is formed between two atoms, when the electronegative difference between them is zero?
How many electrons are required or released by each atom in calcium oxide to attain the nearest noble gas configuration?
Explain
Octet rule for the formation of sodium chloride
\[\ce{^24_12Mg}\] 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.
State the type of bonding in the following molecules.
Water,
In the formation of magnesium chloride (by direct combination between magnesium and chlorine), name the substance that is oxidized and the substance that is reduced.
Elements with stable electronic configurations have eight electrons in their valence shell. They are ______.
