Predict the sign of ∆S for the following reactions.
CaCO3(s) -----> CaO (s) + CO2(g)+ heat
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Predict the order of reactivity of the following compounds in SN1 andSN2 reactions.
i. CH3CH2CH2CH2Br < (CH3)2CHCH2Br < CH3CH2CH(Br)CH3 < (CH3)3CBr (SN1 ) CH3CH2CH2CH2Br > (CH3)2CHCH2Br > CH3CH2CH(Br)CH3 > (CH3)3CBr (SN2 ) stable than derived from CH3CH2CH2CH2Br because of greater electron donating inductive effect...
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A heat engine absorbs heat Q1 at temperature T1 and heat Q2 at temperature T2.
(d) : It does not violate first law of thermodynamics but violates second law of thermodynamics.
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In conversion of limestone to lime, CaCO3(s) → CaO(s) + CO2(g)
Hello SIR, I am a NEET aspirant. I am very sure that this answer is correct and also I have solved it the same way. But my coaching teacher is...
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Although both CO2 and H2O are triatomic molecules, the shape of H2O molecule is bent while that of CO2 is linear.
CO2 molecule has only two bonds which lie farthest to each other to minimise repulsion, making an angle of 180°. H2O, on the other hand, has a lone pair. As lone...
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Predict the relationship between ΔU and ΔH for the following reactions: (i) S(s) + O2(g) → SO2(g) (ii) PCl5(g) → PCl3 (g) + Cl2(g)
(i) Δng = 0 Therefore , ΔU = ΔH + Δng RT , ΔU = ΔH (i) Δng = 1 Therefore , ΔU = ΔH + Δng RT , ΔU >...
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Predict the sign of entropy change in each of the following : (I) H2 (at 298 K, 1 atm) →H2 (at 298K, 10 atm)
Entropy is a measure of randomness or disorder of a system. If randomness increases entropy increases. (I) Gas at lower pressure has greater randomness thanΔ at high pressure (compressed gas) at...
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Predict the sign of ΔS^0 for the following reaction: 2H2S(g)+3O2(g)→ 2H2O(g) + 2SO2(g)
(b) ΔrH = ΣBE (Reactants) – ΣBE (Products).
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The measure of price elasticity of demand of a normal good carries minus sign while price elasticity of supply carries plus sign. Explain why?
It is true that measure of price elasticity of demand for a normal good carrier minus sign because there is an inverse relationship between P and Q. Whereas there is...
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Select correct combination of mathematical sign to replace ‘*’ sign to balance the equation.
9 * 4 * 22 * 14 9 × 4 – 22 = 14
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Complete and balance the following chemical equation: (i) CaCO3 + HCl (ii) Al+HCl (iii) MnO2+HCl
(i) CaCO3(s) 2HCl(aq) → CaCl2(s)+H2O(l)+CO2(g) (ii) 2Al(s)+6HCl(aq) → 2AlCl(aq)+3H2(g) (iii) MnO2+4HCl(aq) → MnCl2+2H2O(l)+Cl2(g)
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