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654 g of zinc reacts with dil. HCl in an open vessel at 37oC liberating hydrogen. Calculate the work done by the hydrogen gas in Joules. What would be the work done by the same gas if the same reaction were carried in a seale ...
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What is oxidation number of iron in Fe(CO)5? Explain how you have calculated. ...
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*Image* Show the mechanism ...
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4.4 g sample of a compound of oxygen and carbon was found to contain 1.2 g carbon and 3.2 g of oxygen. Calculate the percentage composition of the compound. ...
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Unpaired electron is present in which of the following species:- KO2, AlO2-, BaO2 and NO2+ Explain your answer. ...
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Which one is more acidic, p-fluorobenzoic acid or p-bromobenzoic acid and why? ...
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A certain reaction A + B → Product is first-order w.r.t. each reactant with k = 5.0 x 10-3 M-1s-1. Calculate the concentration of A remaining after 100 s if the initial concentration of A was 0.1 M and that of B was 6.0 M. ...
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A sample of chlorine is found to have 75% of 17Cl35 and 25% of 17Cl37. a. Find the average atomic mass of chlorine b. Give the number of neutrons in both the isotopes. ...
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Which of the molecules will have polar bonds but zero dipole moment? A] O2 B] CHCl3 C] CF4 D] None of these ...
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Calculate the equilibrium concentration ratio of C to A if 2.0 ml of each of A and B were allowed to come to equilibrium at 300 K. A + B *Image* C + D dG = 460 cal ...
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Arrange these according to the strengths of the σ-bonds they form along with proper reasons: s-s , s-p, p-p overlap of At. orbitals. ...
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10 ml of a mixture of Na2CO3 and NaHCO3 is titarted with 0.1 M H2SO4 solution. When phenolphthalein is used, it is observed that if 2.5 ml acid solution is added then the solution becomes colourless. After this when one drop ...
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*Image* You can write the mechanism on a paper, scan it (or take a picture of it) and upload it. ...
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An aqueous solution of salt (A) gives a white precipitate (B) with NaCl solution. The filtrate gives a black precipitate (C) when H2S is passed into it. Compound (B) dissolves in hot water and the solution gives a yellow prec ...
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Saturated CaC2O4(aq) is prepared and 250 ml of solution is withdrawn and titrated with 6.3 ml of 0.00102 M KMnO4(aq). What is the value of Ksp for CaC2O4? ...
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Calculate the mass of magnesium oxide obtained by burning 2.4 g of magnesium. ...
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The Mn3O4 formed on strong heating of a sample of MnSO4.4H2O was dissolved in 100cc of 0.1(N) FeSO4 containing H2SO4. The resulting solution reacted completely with 50cc of KMnO4 solution. 25cc of this KMnO4 solution requires ...
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Predict whether the following molecules are iso-structural or not. Justify your answer. NMe3 and N(SiMe3)3. ...
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*Image* Give the product of the organic reaction given above by showing its favourable mechanism. ...
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Arrange in the order of descending bond angle in OF2, OCl2 and OBr2 with proper explanation. ...
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1.922 g of MeOH was burnt in a constant-volume bomb calorimeter. The temperature of water rose by 4.2oC. If the heat capacity of the calorimeter and its contents is 10.4kJoC-1, calculate the molar heat of combustion of MeOH. ...
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Why do we see the characteristic colour of a metal ion when a salt of that metal ion is introduced in the flame? Why is it that all metal ions do not give the flame test? ...
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If you rub a piece of gold, Au, vigorously, you can rub off 2.00 moles of gold atoms in a century. How many minutes are needed to rub off 1.50 micrograms of gold? ...
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How does bleaching powder bleaches water? ...
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What do you mean by an alpha radiation? ...
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Why do you think Pd or Ni can act as a good reducing agent (a good hydrogen donor)? ...
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Can the anode be –vely Charged and a cathode +vely charged? Give an example if your answer is yes. ...
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Why do you think ice occupies more volume than the same mass of water? ...
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Although Carbon is a non-metal, but one of its allotrope, Graphite conducts electricity. Why? ...
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What happens when we add ammonia to copper sulphate solution? Please provide a balanced equation. ...
