{"id":8060,"date":"2024-01-03T11:51:30","date_gmt":"2024-01-03T06:21:30","guid":{"rendered":"https:\/\/www.aplustopper.com\/?p=8060"},"modified":"2024-01-03T16:24:47","modified_gmt":"2024-01-03T10:54:47","slug":"chemical-bonding-icse-solutions-class-10-chemistry","status":"publish","type":"post","link":"https:\/\/www.aplustopper.com\/chemical-bonding-icse-solutions-class-10-chemistry\/","title":{"rendered":"ICSE Solutions for Class 10 Chemistry – Chemical Bonding"},"content":{"rendered":"
ICSE Solutions<\/a>Selina ICSE Solutions<\/a><\/p>\n APlusTopper.com provides ICSE Solutions for Class 10 Chemistry Chapter 2 Chemical Bonding for ICSE Board Examinations. We provide step by step Solutions for ICSE Chemistry Class 10 Solutions Pdf.\u00a0You can download the Class 10 Chemistry ICSE Textbook Solutions with Free PDF download option.<\/p>\n Download Formulae Handbook For ICSE Class 9 and 10<\/a><\/p>\n Question 1:<\/strong> The combination of atoms to form molecules is based on octel rule. Give two limiations of this rule. Question 2:<\/strong> Write the general characteristics of electrovalent compounds. Question 3:<\/strong> On what factors the formation of an electrovalent compound depends ? Question 4:<\/strong> What are the salient features of electrovalency<\/a> ? Question 5:<\/strong> Write important general characteristics of covalent compounds. Question 6:<\/strong> (i) Name the charged particles which attract one another to form electrovalent compounds. Question 7:<\/strong> In the formation of compound XY2<\/sub>, atorix X gives one electron to each Y atom. What is the nature of bond to XY2<\/sub> ? Give four properties of XY2<\/sub>. Question 8:<\/strong> There are three elements E, F, G with atomic numbers 19, 8 and 17 respectively. Question 9:<\/strong> (i) Give one property of hydrogen chloride which agrees with it being a covalent compound. Question 10:<\/strong> A compound has the formula H2<\/sub>Y (Y = Non-metal). State the following : Question 11:<\/strong> Elements X, Y and Z have atomic number 6, 9 and 12 respectively. Which are :Short Questions<\/span><\/h3>\n
\nAnswer:<\/strong> (i) It cannot explain the formation of molecules like BeF2<\/sub>, BF3<\/sub> in which the central atom has less than 8 electrons in its valence shell.
\n(ii) It cannot explain the formation of molecules such as PF5<\/sub>, SF6<\/sub> etc., in which central atom has more than eight electrons in its valence shell.<\/p>\n
\nAnswer:<\/strong> The general characteristics of electrovalent compounds<\/a> are:
\n(i) Electrovalent compounds are mostly crystalline in nature.
\n(ii) Electrovalent compounds form hard crystals. These crystals are usually brittle.
\n(iii) Electrovalent compounds have high density with high melting and boiling points.
\n(iv) Electrovalent compounds are soluble in polar solvents.
\n(v) Electrovalent compounds exhibit isomorphism.
\n(vi) They react very fast.<\/p>\n
\nAnswer:<\/strong> The formation of an ionic compound<\/a> depends on the following factors:
\n(i) Low ionisation energy: Lesser is the ionisation energy of an atom, greater will be its tendency to form cation by losing the valence electron. Metals with lower ionisation energy values have a greater tendency to form ionic bonds.
\n(ii) High electron affinity: Higher the value of electron affinity, greater will be the tendency of the atom to gain electron and form an anion. Elements with high electron affinity values form ionic compounds.
\n(iii) High lattice energy: The higher is the value of lattice energy, greater will be the electrostatic force of attraction between the oppositely charged ions and hence ionic compounds are formed with greater ease by release of energy.<\/p>\n
\nAnswer:<\/strong> Some salient features of electrovalency are mentioned below :
\n(i) An electrovalent bond is formed by loss or gain or transfer of electrons.
\n(ii) Ions<\/a> are formed during the formation of an electrovalent bond<\/a>.
\nPositive ions —> Cations (Na+<\/sup>, K+<\/sup>, Ca2+<\/sup>, etc.)
\nNegative ions —> Anions (Cl–<\/sup>, O2-<\/sup>, N3-<\/sup>, etc.)
\n(iii) An electrostatic force of attraction exist between the oppositely charged ions.
\n(iv) There is one fixed direction in space among the ions.<\/p>\n
\nAnswer:<\/strong> The important general characteristics of covalent compounds are as follows:
\n(i) Usually covalent compounds exist in gaseous, liquid or amorphous state.
\n(ii) Covalent compounds have low melting or boiling points.
\n(iii) Except for graphite, covalent compounds are bad conductors of electricity.
\n(iv) Covalent compounds are soluble in non polar solvents (usually organic solvents). Polar cgvalent compounds are however soluble in polar solvents.
\n(v) Covalent compounds contain molecules and they undergo reactions slowly.
\n(vi) Many covalent compounds exhibit various types of isomerism.<\/p>\n
\n(ii) In the formation of electrovalent compounds, electrons are transferred from one element to another. How are electrons involved in the formation of a covalent compound ?
\n(iii) The electronic configuration of nitrogen is 2, 5. How many electrons in the outer shell of a nitrogen atom are not involved in the formation of a nitrogen molecule ?
\n(iv) In the formation of magnesium chloride (by direct combination between magnesium and chlorine), name the substance that is oxidised and the substance that is reduced.
\nAnswer:<\/strong> (i) Cation and anion<\/a>
\n(ii) There is a mutual sharing of electrons
\n(iii) 2
\n(iv) Magnesium is oxidised and chlorine is reduced.<\/p>\n
\nAnswer:<\/strong> The bond in XY2<\/sub> is ionic.
\nProperties:<\/strong>
\n(i) It is hard and brittle.
\n(ii) It is soluble in water.
\n(iii) It has high melting and boiling point.
\n(iv) It does not conduct electric current in the solid state but conducts electric current in the molten or dissolved state.<\/p>\n
\n(i) Classify the elements as metals and non-metals<\/a>.
\n(ii) Give the molecular formula of the compound formed between E and G and state the type of chemical bond in this compound.
\nAnswer:<\/strong>
\n<\/p>\n
\n(ii) Give one property of magnesium chloride which agrees with it being an ionic compound.
\n(iii) Name one compound which is covalent, but on dissolving in water conducts electricity ?
\n(iv) Which property of the above compound agrees with the being of a covalent compound ?
\nAnswer:<\/strong> (i) Hydrogen chloride is a gas at room temperature and in dry state it is a bad conductor of electricity.
\n(ii) Magnesium chloride in the molten state or in aqueous solution is a good conductor of electricity and therefore is an ionic compound.
\n(iii) Hydrogen chloride.
\n(iv) Hydrogen chloride is a gas. In dry state, it is bad conductor of electricity. Hence, it is a covalent compound.<\/p>\n
\n(i) the outer electronic configuration of Y.
\n(ii) the valency of Y.
\n(iii) the bonding present in H2<\/sub>Y.
\n(iv) the formula of the compound formed between calcium \\(_{ 20 }^{ 40 }{ Ca }\\) and Y.
\nAnswer:<\/strong> (i) Y has six electrons in its valence shell.
\n(ii) 2
\n(iii) Covalent
\n(iv)
\n<\/p>\n
\n(i) forms an anion (ii) forms a cation ?
\n(iii) has four electrons in its valence<\/a> shell ?<\/p>\n