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New answer posted
a year agoContributor-Level 10
This is a Long Type Questions as classified in NCERT Exemplar
The amount of energy required to remove an electron from the outermost shell of an isolated gaseous atom in its ground state is said to be ionisation enthalpy.
The factors that affect ionization enthalpy of the elements are as follows:
(a) Effective nuclear charge with its increase the ionization enthalpy also increases
(b) Atomic size with its increase the ionization enthalpy decreases
(c) The e-e - repulsion with its increase the ionization enthalpy decreases
(d) Whenever there exists half filled or completely filled orbital than it lead to increase the ionization enthalpy b
New answer posted
a year agoContributor-Level 10
This is a Long Type Questions as classified in NCERT Exemplar
The factors that affects electron gain enthalpy are as follows:
(a) Effective nuclear charge with its increase the electron gain enthalpy also increases
(b) Atomic size with its increase the electron gain enthalpy decreases
(c) The e-e - repulsion with its increase the electron gain enthalpy decreases
(d) Whenever there exists half filled or completely filled orbital than it lead to decrease the electron gain enthalpy because it leads to give extra stability to the atom due to symmetry
The electron gain enthalpy decreases down the group and increases across the period.
New answer posted
a year agoContributor-Level 10
This is a Matching Type Questions as classified in NCERT Exemplar
(i)→ (a), (d); (ii)→ (c); (iii)→ (a); (iv)→ (b)
New answer posted
a year agoContributor-Level 10
This is a assertion and reason answer type question as classified in NCERT Exemplar
(ii) Assertion and reason both are correct statements but reason is not correct
Explanation for assertion.
Explanation: Assertion is correct statement but reason is a wrong statement because a semipermeable membrane allows solvent molecules to move through a lower concentration solution to a higher concentration solution, osmosis is the flow of solvent molecules from the solvent side to the solution side through a semipermeable membrane.
New answer posted
a year agoContributor-Level 10
This is a assertion and reason answer type question as classified in NCERT Exemplar
(i) Assertion and reason both are correct statements and reason is correct explanation for assertion.
Explanation: When a nonvolatile solute (such as NaCl) is added to water, a NaCl solution is created. When compared to pure water, the solution has a lower vapour pressure because there are less water molecules at the liquid's surface. A dip, or drop in the freezing point of water, is noticed as a result of this decrease in vapour pressure.
New answer posted
a year agoContributor-Level 10
This is a assertion and reason answer type question as classified in NCERT Exemplar
(iv) Assertion and reason both are incorrect statements.
Explanation: (i) Both methyl alcohol and water are volatile liquids that, when mixed together to produce a binary solution, have a higher vapour pressure than the separate pure components. The boiling point of water is reduced as a result of this.
(ii) When methyl alcohol is introduced to water, the A-B interaction (also known as the A-A or B-B interaction) occurs, resulting in a positive divergence from Raoult's rule. The boiling point decreases when a positive di
New answer posted
a year agoContributor-Level 10
(i) Assertion and reason both are correct statements and reason is correct explanation for assertion.
Explanation: (i) In terms of 'Molarity (M), ' the number of moles of the solute dissolved per litre of solution is the strength of a solution.
(ii) Because the volume of a liquid changes with temperature, the volume of a solution changes as well, while the number of moles of solute in it remains constant (or unchanged). As a result, the molarity of the solution would be affected.
New answer posted
a year agoContributor-Level 10
This is a matching answer type question as classified in NCERT Exemplar
(i)- (d); (ii)- (c); (iii)- (b); (iv)- (e); (v)- (a)
New answer posted
a year agoContributor-Level 10
This is a matching answer type question as classified in NCERT Exemplar
(i)- (c); (ii)- (e); (iii)- (d); (iv)- (a); (v)- (b)
New answer posted
a year agoContributor-Level 10
This is a matching answer type question as classified in NCERT Exemplar
(i)- (e); (ii)- (c); (iii)- (d); (iv)- (b); (v)- (a)
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