Question

Define the terms:
(i) Electrovalent or ionic bond
(ii) Electrovalent or ionic compound.

July 30, 2024

Answer

lectrovalent or Ionic Bond: A chemical bond formed between two atoms by the transfer of one or more electrons from a metallic (electropositive) element to a non-metallic (electronegative) element.

Electrovalent or Ionic Compound: A chemical compound formed as a result of the transfer of one or more electrons from an atom of a metallic (electropositive) element to an atom of a non-metallic (electronegative) element.

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A compound has a formula = ‘H2Y’. Y denotes a non-metal. State the following:
1. The electronic configuration of Y.
2. The valency of Y.
3. The bonding present in ‘H2Y’
4. The bonding present in the compound formed between potassium (19K39) and ‘Y’
5. The formula of the compound formed between calcium (20Ca40) and Y.

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Electronic configuration of the following elements are given:
1. Sodium — Na = 2, 8, 1
2. Hydrogen — H = 1
3. Carbon — C = 2, 4
4. Chlorine — Cl = 2, 8, 7
5. Lithium — Li = 2,1
State which of the compounds given below:
(a) have high/low boiling points,
(b) are soluble/insoluble in organic solvents.
A : Hydrogen chloride
B : Sodium chloride
C : Sodium hydride
D : Lithium chloride
E : Carbon tetrachloride

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Fill in the blanks with the correct word from the brackets:
(i) The bond between two elements in group 17[VIIA] of the periodic table is likely to be [ionic/covalent].
(ii) In the reaction of Cl2 + 2KI ⟶ 2KCl + I2 the conversion of 2I to I2 is deemed as [oxidation/reduction].
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Complete the table given below:
Element Element Type of bond likely in molecule of Formula of compound
A: At. no. = 20 B: At no. = 8 A and B
A: At no. = 20 C: At no. = 17 A and C
D: At. no. = 9 D: At. no. = 9 D and D
E: At. no. = 12 F: At. no. = 16 E and F
G: At. no. = 1 F: At. no. = 16 G and F

Element	Element	Type of bond likely in molecule of
A: At. no. = 20	B: At no. = 8	A and B
A: At no. = 20	C: At no. = 17	A and C
D: At. no. = 9	D: At. no. = 9	D and D
E: At. no. = 12	F: At. no. = 16	E and F
G: At. no. = 1	F: At. no. = 16	G and F