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insulin contains 3.4% sulphur. what will be the minimum molecular weight of insuli

39 How to convert tetrahydrofurane to butane

the geometry of electron pairs around iodine in IF5 is ?why is it not square pyramidal

73. Convert acetone to chloroform and vice versa

What will be the equilibrium concentration at 127C if equilibrium constant at 27C is 4 for Habbers process (Enthalpy change H = -46.06 kJ)

23. Number of gram equivalent of h2so4 present in 200 ml of M/10 h2so4 solution is

13. What are electropositive elements? Is hydrogen a electronegative element?

1.12 litre dry chlorine at STP as passed over a heated metal when 5.56g of chloride of the metal was formed.what is the equivalent weight of the metal?

Let f and g be real functions such that fog is defined if g is continuous at x=a and f is continuous at g (a), show that fog is continuous at x=a

Why is the number of atoms in BCC lattice of ionic solids 1?

65. B has two isotopes Boron 10 (19%) and Boron 11 (81%). The atomic mass of B is

3. Which is stronger acid and why: orthohydroxy toluene or parahydroxy toluene?

For the preparation of isopropyl bromide from isopropyl alcohol, which of the following reagents is most preferred? P4/Br2,Br2/CH3COOH,HBr/H2SO4,NaBr

32.Does sulpahte ion have dative bond

The IUPAC name of ethylidene chloride is:

In the conversion of I2 IO3–, the oxidation state of iodine changes from o to +5 give reason

When 3-methylbutan-2-olis treated with HBr, the following reaction takesplace:Give a mechanism forthis reaction.(Hint : The secondarycarbocation formed in step II rearranges to a morestable tertiarycarbocation by a hydride ion shift from 3rd carbon atom.

65 What happens when So2 is passed through an aqueous solution of Fe(111) salt?

The orbital angular momentum of a 4p electron will be :

In aldehyde R-C(O)H and in carboxylic acid R-COOH R can be hydrogen but in ketone R-O-R and in alcohol R-OH why R can't be hydrogen

why size of sodium if bigger then magnisium ?

Consider the following complexes: V(CO)6 Fe(CO)5 Cr(CO)6 [Mn(CO)6] [PtCl6]2− Among the given complexes, number of complexes which have 18 e− in their valence shell is/are:

51.Explain the formation of the depletion region and barrier potential in a p-n junction diode. How does the flow of current through the junction change during : 1. Forward bias 2. Reverse bias Click here to view details:

Why does KMnO4 undergo different conversions with acidic, basic and neutral mediums?

23 The total number of configurational isomers given compound are:- CH3-CH=CHCHOHCHOHCH3

Maximum number of electrons present in 4d Orbital

The correct thermodynamic conditions for the spontaneous reaction at all temperatures is

Which of the following is more reactive towards nitration?

43.0.28 g of an organic compound was heated with concentrated H₂SO₄ and then distilled with NaOH to produce NH₃. NH₃ gas is passed through 50 mL (M/20) H₂SO₄. Remaining acid required 40 mL (M/10) alkali for complete neutralisation. Calculate the %age of nitrogen.

Excess of KI and dil. H_2SO_4 were mixed in 50 ml H_2O_2. Thus, I_2 liberated requires 20 ml of 0.1 N Na_2S_2O_3. What will be the strength of H_2O_2 in gL^{-1

75.2 g of C6H5OH (Phenol) is dissolved in a solvent of Kf=14. If the depression in freezing point is 7 K. Then find the percentage of phenol that dimerizes.(Given, molar mass of phenol=94 g mol−1, mass of solvent =1 kg)

Which of the following has least polar C−X bond?

There are 50 bolts and 50 nuts in a bag. Half of them are rusted. Two of them are drawn from the bag with replacement. Find the probability that either both of them are rusted or both of them are bolts?

how square close packing gives rise to primitive cubic unit cell

Which of the following options have incorrect order of rate in step 2 for different R−X?

25. Eliminate A between the equation:a tanA + b cot2A = c and a cotA - b tan2A = c volume of every gaseous molecule is V? (1) 4 V N (3) 3 V (4) 3 V NA

How many of the given compounds cannot decolourise bromine water

4 mol of a mixture containing one mol each of LiNO3, NaNO3, Ca(NO3)2 and Mg(NO3)2 is decomposed by strongly heating the total number of moles of NO2 evolved is (assuming complete decomposition of all the salts.)

The correct order of C-O bond length among CO, CO32-and CO2 is

what does SO3 behave like during sulphonation of benzene? does it behave as an electrophile and HOW ?

Mention few application of ammonia.

Integrate the following:ʃdx/(x³+x⁴)

A certain mass of gas is expanded from (1L, 10 atm) to (4L, 5 atm) against a constant external pressure of 1 atm. If initial temperature of gas is 300K and the heat capacity of process is 50 J/∘C. Then the enthalpy change during the process is:(1L atm = 100 J)

Major product obtained in the following reaction is:

S4O2−6(aq)+Al(s)→H2S(aq)+Al3+(aq)On balncing the above unblanced reaction (in acidic medium), the ratio of coefficient of H+ to that of H2O is:

Match the elements given in Column I with the colour they impart to the flame given in Column II. ColumnIColumnIIA.Cs1.Apple greenB.Na2.VioletC.K3.Brick redD.Ca4.YellowE.Sr5.Crimson redF.Ba6.Blue.

(a) Using the Bohr’smodel calculate the speed of the electron in a hydrogen atom in the n= 1, 2, and 3 levels. (b) Calculate the orbital period in each ofthese levels.

The ability of an ion to bring about coagulation of a given colloid depends upon

Na+Al2O3High−−−−→Temp.XCO2 in−−−−→waterY; The compound Y is