Chemical Bonding Very Short Ans Concise Class-10 ICSE Chemistry Selina Solutions. We Provide Step by Step Answer of Very Short Ans, Exercise-2, ICSE Class-10. The given Solutions is according to the Latest editions. Visit official Website CISCE for detail information about ICSE Board Class-10.
Chemical Bonding Very Short Ans Concise Class-10 ICSE Chemistry Selina Solutions
| Board | ICSE |
| Book / Publication | Concise / Selina |
| Subject | Chemistry |
| Class | 10th |
| Writer | Dr SP Singh |
| Chapter-2 | Chemical Bonding |
| Topics | Very Short Ans |
| Edition | 2025-2026 |
Chemical Bonding Very Short Ans ICSE Class-10 Concise Chemistry Selina Solutions Chapter-2
Page-36
Que-1: Fill in the blanks by selecting the correct word from the brackets :
(a) When the nuclei of two different reacting atoms are of …………… mass, then a bond so formed is called …………… covalent bond (equal, unequal, polar, non-polar).
(b) In case of non-polar covalent bond, the covalent bond is formed in the …………… of atoms and shared electrons are …………… distributed (corner, middle, equally, unequally).
(c) Ionic or electrovalent compounds do not conduct electricity in their …………… state (fused/solid).
(d) The ions in …………… compounds are held very strongly due to strong …………… forces (electrovalent, covalent, electromagnetic, electrostatic).
(e) In covalent compounds, the bond is formed due to …………… [sharing/transfer] of electrons.
(f) Electrovalent compounds have a …………… [low/high] boiling point.
Ans:
(a) Unequal, Polar
(b) Middle, Equally
(c) Solid
(d) Electrovalent, Electrostatic
(e) Sharing
(f) High
Que-2: Give one word or phrase for the following :
(a) Formation of ions from molecules.
(b) A bond formed by a shared pair of electrons with both electrons coming from the same atom.
(c) A bond formed by a shared pair of electrons, each bonding atom contributing one electron to the pair.
Ans:
(a) Ionisation
(b) Coordinate bond
(c) Covalent Bond
Que-3: 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.
Ans: Magnesium is oxidized and Chlorine is reduced.
In the formation of magnesium chloride the reaction is :
Mg + Cl2 ⟶ Mg+2 + 2Cl–
Oxidation : Mg ⟶ Mg+2
Reduction : Cl2 ⟶ 2Cl–
Que-4: Give an example in each of the following :
(a) Co-ordinate bond compound,
(b) Solid covalent compound,
(c) Gaseous polar covalent compound,
(d) Gaseous non polar covalent compound,
(e) Liquid non polar covalent compound,
(f) Compound with electrovalent and covalent bond,
(g) Compound with all three types of bonds.
Ans:
(a) Ammonium ion (NH4+) & Hydronium ion (H3O+),
(b) Phosphorus pentoxide (P2O5) & Silicon dioxide or Silica (SiO2),
(c) Hydrogen sulphide (H2S) & Ammonia (NH3),
(d) Hydrogen (H2) & Oxygen (O2),
(e) Toluene & Gasoline.
(f) Calcium Carbonate (CaCO2)
(g) Ammonium chloride (NH4Cl)
Que-5: Electrons are getting added to an element Y :
(i) Is Y getting oxidized or reduced ?
(ii) Which electrode will Y migrate to during the process of electrolysis ?
Ans:
(i) Y is getting reduced as reduction is gain of electrons.
(ii) Y migrates towards anode. Y is negatively charged as electrons are added to it. So, it migrates towards the positive terminal that is anode
—: End of Chemical Bonding Very Short Ans Concise Class-10 ICSE Chemistry Selina Solutions Ch-1 : –
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