QQuestion
Define / State:
(a) Electronegativity.
(b) Gay-Lussac’s law of combining volumes.
ICSEClass 10ChemistryChemical Bonding02 Mark2023 Moderate
✓Answer
(a) Electronegativity is the tendency of an atom in a molecule to attract the shared pair of electrons towards itself.
(b) When gases react, they do so in volumes that bear a simple whole-number ratio to one another and to the volume of gaseous products, provided all volumes are measured at the same temperature and pressure.
Was this answer helpful?
Related Questions
More ICSE Moderate level questions
1/12
Arrange the following according to the instructions given in brackets: (a) C2H2, C3H6, CH4, C2H4 (In the increasing order of the molecular weight) (b) Cu2+, Na+, Zn2+, Ag+ (The order of Preferential discharge at the cathode)
Give a reason for each: (a) Ionisation potential decreases down a group. (b) Ionic compounds do not conduct electricity in the solid state.
Choose the answer from the list which fits in the description: [CCl4, PbO, NaCl, CuO, NH4Cl] (a) A compound which undergoes thermal dissociation. (b) An amphoteric oxide. (c) A compound which is a non-electrolyte.
Match the Column A with Column B: Column A Column B (a) Sodium chloride 1. has two shared pair of electrons (b) Methane 2. has high melting and boiling points (c) Hydrogen chloride gas 3. a greenhouse gas (d) Oxidation reaction 4. has low melting and boiling points (e) Water 5. Zn − 2e− ⟶ Zn2+ 6. S + 2e− ⟶ S2−
State the terms/process for the following: (a) The energy released when an atom in the gaseous state accepts an electron to form an anion. (b) Tendency of an element to form chains of identical atoms. (c) The name of the process by which Ammonia is manufactured on a large scale. (d) A type of salt formed by partial replacement of hydroxyl radicals with an acid radical. (e) The ratio of the mass of a certain volume of gas to the same volume of hydrogen measured under the same conditions of temperature and pressure.
Fill in the blanks with the choices given in the brackets: (a) Metals are good ............... [oxidizing agents /reducing agents] (b) Non-polar covalent compounds are ............... [good / bad] conductors of heat and electricity. (c) Higher the pH value of a solution, the more is ............... [acidic / alkaline] it is. (d) ............... [Silver chloride / Lead chloride] is a white precipitate that is soluble in excess of Ammonium hydroxide solution. (e) Conversion of ethene to ethane is an example of ............... . [hydration / hydrogenation]
Ethane burns in oxygen according to the chemical equation: 2C2H6 + 7O2 → 4CO2 + 6H2O If 80 ml of ethane is burnt in 300 ml of oxygen, find the composition of the resultant gaseous mixture when measured at room temperature.
Calculate: (a) The percentage of phosphorus in the fertilizer super phosphate Ca(H2PO4)2 correct to 1 decimal point. (b) Write the empirical formula of C8H18 [At. Wt. H=1, P=31, O=16, Ca=40]
Equal volumes of ammonia gas and chlorine gas are kept in two different containers under the same conditions of temperature and pressure. Find the number of molecules contained in chlorine gas when the mass of ammonia is 34 g. [Atomic weight: Cl=35.5, H=1, N=14]
(a) State Avogadro’s Law. (b) Define Co-ordinate bond.
5.6 litres of gas Z weighs 32 g at STP. What is the molecular weight and vapour density of Z?
A gas cylinder can hold 150 g of hydrogen under certain conditions of temperature and pressure. If an identical cylinder with the same capacity can hold 450 g of gas ‘G’ under the same conditions of temperature and pressure, find: (a) the vapour density of the gas ‘G’. (b) the molecular weight of gas ‘G’.