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Which of the following is the correct order with respect to the property indicated? (1) Cl > F (Ionisation energy) (2) K2O > Na2O > Al2O3 (Basic nature) (3) K > Na > Al > Mg (Metallic character) (4) None of these

By jschemistrytelugu@gmail.comPosted on Posted in TrendsNo Comments on Which of the following is the correct order with respect to the property indicated? (1) Cl > F (Ionisation energy) (2) K2O > Na2O > Al2O3 (Basic nature) (3) K > Na > Al > Mg (Metallic character) (4) None of these

Answer (2) Sol.      F > Cl :    Fluorine has higher first ionisation energy than chlorine due to its smaller atomic size, leading to greater effective nuclear charge and tighter hold on the valence electron despite higher electron-electron repulsion in F. The given order Cl > F is incorrect. tThe actual order is […]

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Chemistry in everyday life very short answer questions

By jschemistrytelugu@gmail.comPosted on Posted in CHEMISTRY IN EVERYDAY LIFENo Comments on Chemistry in everyday life very short answer questions

Chemistry in everyday life                       Chemistry plays a significant role in our everyday life, from the food we eat and the medicines we use to the materials and products that surround us. Many concepts in chemistry, especially in topics like polymers, drugs, soaps, detergents, and […]

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Acid -Base theories

By jschemistrytelugu@gmail.comPosted on Posted in IONIC EQUILIBRIUMNo Comments on Acid -Base theories

Arrhenius Theory of Acids and Bases It was proposed by Arrhenius to explainthe behaviour of acids and bases in aqueous solutions. Arrhenius acids:— A substance that produces hydrogenions (H⁺) when dissolved in water. ex:(i) HCl (aq) → H⁺ (aq) + Cl⁻ (aq)(ii) H₂SO₄ (aq) → 2H⁺ (aq) + SO₄²⁻ (aq)(iii) HNO₃ (aq) → H⁺ (aq) […]

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Question: Choose the correct option for free expansion of an ideal gas under adiabatic condition is A) 𝑞 = 0 ,    𝑊 = 0 ,    Δ 𝑇 = 0 B) 𝑞 = 0 ,    𝑊 = 0 ,    Δ 𝑇 ≠ 0 C) 𝑞 = 0 ,    𝑊 = 0 ,    Δ 𝑇 < 0 D) 𝑞 = 0 ,    𝑊 = 0 ,    Δ 𝑇 > 0.

By jschemistrytelugu@gmail.comPosted on Posted in THERMODYNAMICSNo Comments on Question: Choose the correct option for free expansion of an ideal gas under adiabatic condition is A) 𝑞 = 0 ,    𝑊 = 0 ,    Δ 𝑇 = 0 B) 𝑞 = 0 ,    𝑊 = 0 ,    Δ 𝑇 ≠ 0 C) 𝑞 = 0 ,    𝑊 = 0 ,    Δ 𝑇 < 0 D) 𝑞 = 0 ,    𝑊 = 0 ,    Δ 𝑇 > 0.

              Solution :-    Correct option : (1) In  a free expansion, P_ext = 0 — (1) then,W = PΔV= 0 (ΔV) W = 0 — (2) Since, it is an adiabatic process, Heat is constant – q = 0 — (3) acc. to first law of thermodynamics, ΔU […]

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Lanthanide contraction – causes and consequences

By jschemistrytelugu@gmail.comPosted on Posted in f block elementsNo Comments on Lanthanide contraction – causes and consequences

Lanthanide contraction : ” the steady decrease in the atomic and ionic radii of lanthanides with increasing the atomic number  is called Lanthanide contraction”. Atomic radii do show some irregularities   but ionic radii decrease steadily  from La to Lu. Causes : When we proceed from one element to the next element in Lanthanide series, the […]

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derivation for the determination of the rate constant and units for first order reaction.

By jschemistrytelugu@gmail.comPosted on Posted in CHEMICAL KINETICSNo Comments on derivation for the determination of the rate constant and units for first order reaction.

Rate constant for the first order reaction:  The reaction in which the rate of reaction depends only on the concentration of one reactant is called first order reaction. The rate constant for the first order reaction can be determined in the following way,                     A    […]

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Orbit vs Orbital key differences. Clear Explanation for Students

By jschemistrytelugu@gmail.comPosted on Posted in ATOMIC STRUCTURENo Comments on Orbit vs Orbital key differences. Clear Explanation for Students

      difference between orbit and orbital. Orbit: Orbit is a circular path in which electron is  revolving around the nucleus. It represents 2-D motion of an electron. It has no directional properties.  Maximum number of electrons can be accommodated in an orbit is  2n². Shape of an orbit is circular. position  and velocity […]

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National Mathematics Day School Speech: Inspiring Words by Students and Teachers on Srinivasa Ramanujan.

By jschemistrytelugu@gmail.comPosted on Posted in TrendsNo Comments on National Mathematics Day School Speech: Inspiring Words by Students and Teachers on Srinivasa Ramanujan.

          National mathematics day                 Respected principal and students good morning to one  and all. Today we are celebrating a very special day, that is National mathematics day. You know,  it is celebrated to honour the birth anniversary of one of the greatest mathematicians in […]

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Do you know the limitations of first law of thermodynamics

By jschemistrytelugu@gmail.comPosted on Posted in THERMODYNAMICSNo Comments on Do you know the limitations of first law of thermodynamics

First law of thermodynamics has some limitations. Before going to know about that, we need to remind what are the different forms of first law of thermodynamics. First law of thermodynamics is also known as law of conservation of energy. “Energy neither be created nor be destroyed, but it can be changed from one form […]

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