Recently Active Chemistry Questions

Q.1 : Answer the following questions based on the potential energy diagram shown here: *Image* a. Does the graph represent an endothermic or exothermic reaction? b. Label the position of the reactants, products, and activated ...

Suppose you have done 6 litre-atm. work to raise some water by certain temperature. Specific heat capacity of water is 4.124 J g-1 K-1. Find out the work you have done (6 litr-atm.) in Joules. Plzzzzzzzzzz explain .... ...

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please try to indentify the intermediate compuonds formed. It's one of b555's problems. conversion of benzaldehyde to 3-phenylpropanol. exp in brackets is the reagent used. benzaldehyde ----->(ethanol / OH- ) ------------- ...

Q1. Selected bond angles for five hydrocarbons are shown below. Arrange these hydrocarbons according to their pKa values, from lowest to the highest *Image* ans: 6>2>3>4>5>1 Q2. Rank the following in decreasing ...

Hydrocarbons exist in aliphatic and alicyclic forms.For the cyclic forms,the Baeyer strain theory is applicable.However this theory can only partly explain the stability of these hydrocarbons.The strain occurs due to a variet ...

Read all these things today....tell me if they are in syllabus or not..since they are from the most untouched chapter:Amino acids 1)Preparation of amino acids from Ketonic acid 2)Preparation of amino acids by Strecker method ...

How would you rate Arihant Objective Chemistry for Objective practise for JEE? and how many questions does it have for each topic(approx) ...

We're looking at the reaction: RCl + OH- → ROH + Cl- (R being the (CH3)3C-radical) The reaction is supposed to follow the mechanism: RCl → R+ + Cl- (k1 forward reaction; k-1 backward reaction) R+ + OH- → ROH (k2 forward ...

What is the n-factor of Fe2(SO4)3 in the following reaction: Fe2(SO4)3 --> FeSO4 + SO2 ? ...

Q1 which can be used as solvent in friedel craft reaction a)nitrobenzene b)toulene c)phenol d)toulene Q2 T/F a)energy (hybrid strucuture) less than resonance strucutre b)resonance energy=diff in enthalpies of formation of mol ...

Helium can be excited to 1s12p1 configuration by supplying 33.12×10-19 J of energy .The lowest excited singlet state 1s12s1 lies 5000 cm-1 below 1s12p1 state . what should be the average He-X bond energy so that HeX2 could f ...

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The incorrect statement/s w.r.t isothermal reversible expansion of an ideal gas from among the following is/are : (a) The change in Entropy of 1 mole of an ideal gas is given by ΔSsys = R ln V1/V2 (b) ΔSsurr = - qrev/T (c) ...

Calculate the n-factor of K2MnO4 in acidic medium ...

Arrenge the fllowing ions in correct order of decreasing nucleophilicity in non polar solvent OH- ,NH2- ,F- ,CH3- ...

Do you think a score of 213 is enough to clear NSEC ? ...

Q : 2 H2 + O2 → 2 H2O This reaction is exothermic in the forward direction: 2 H2 + O2 → 2 H2O + 285 kJ but endothermic in the reverse direction: 2 H2O + 285 kJ → 2 H2 + O2 Consider a general reversible reaction such as: ...

lets put forward our doubts and knowledge on "optical isomerism " in this thread.....that will be a great move ....i feel !!!! ...

Acidified K2Cr2O7will fail to distinguish between A)CO and CO2 B)C2O42- and CO3- C)CO and SO2 D)C2O42- and F- Please state why ...

The ionization energy of the coinage metals fall in the order Cu<Ag>Au .Why ? ...

Somebody asked me this question: *Image* I'm wondering what could answer be.. initially thought of anthracene but that probably couldn't be case. I'm not knowing answer.. can anyone solve it? ...

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1. Any tertiary alkyl halide is taken and reacted with aq NaOH in i>H2O ii>DMSO.The reactions undergone are a. SN2,SN2 B. SN1,SN1 c. SN1,SN2 d. SN2,SN1 Multi Ans Correct --- 2. In conversion of EAA to 3-methyl-2-pentano ...

how stable is it? i want to know more about this , plz give some links . i waqnt the content to be only about anilinium ion and not in terms of basicity with amines. ...

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Statues coated with white lead on long exposure to atmosphere turn black and the original colour can be restored on treatment with H2O2 .Why ? ...

Q. There are four compounds X,Y,Z,W whose standard reduction potentials are -0.8V, 0V, 0.8V and 1.5 V Which of these can act best as both reducing and oxidising agent? (a) X (b) Y (c) Z (d) W ...

What is the pH of a solution prepared by mixing 0.0100 mol HA (with Ka = 1.00*10-2) and 0.0100 mol of A- and diluting with water to 1.00 L? ...

1 mole N2H4 loses 10 moles of electrons to form a new compound Y . assuming that all nitrogen appear in the new compound, what is the oxidation state of nitrogen ? ( there is no change in ON of hyogen )..... a) -1 b) -3 c) +3 ...