NEB Question Browser

With 1M solution of ion at 25°C and 1atm. pressure, what will be the cell potential?

A primary alcohol of molecular weight 46 is boiled with sodium hydroxide and iodine. When the same alcohol is heated with ethanoic acid in presence of conc. H₂SO₄, one of the derivatives of carboxylic acid is obtained. Write the reactions involved in both conditions. What would be the product obtained when the same alcohol is heated with conc. H₂SO₄? How would you distinguish the above alcohol from methanol?

Can we predict the spontaneity of the given reaction at 0°C?

Out of Fe³⁺ and Fe²⁺ which one is more stable? Explain on the basis of distortion seen in above figure

What amount of Zn(OH)₂ will be precipitated out at 25°C if 100 mL of 0.22 g NaOH is added to 1 litre of a saturated solution of Zn(OH)₂? Precipitate is obtained in this reaction, why? [Solubility product of Zn(OH)₂ at 25°C is 1.8 × 10⁻¹⁴]

Why do such elements which give such splitting show good catalytic properties?

Identify B and C.

Write the cell notation indicating anode and cathode.

Starting from compound P, how do the reactions proceed ahead to obtain T which gives benzene where R is aniline? Complete the reaction sequence with suitable conditions.

Derive the relation
k = log
Show that for the first order reaction the time required for half the change (half-life period) is independent of the initial concentration

Calculate the total entropy of the universe at given condition 3.

Convert metal X into its vitriol.

On the basis of the given distortion, how can you explain [Cu(H₂O)₆]²⁺ is blue colored complex?

2.16 g of pure Na₂CO₃ is added to 400 mL deci-normal solution of H₂SO₄. How many grams of H₂SO₄ is further required to neutralize the resultant solution completely?

Differentiate between OPC and PPC cement.

A list of compounds is given as follows:
p-hydroxyazobenzene, C₆H₅NCl, C₆H₅NH₂, C₆H₅NO₂, C₆H₆

From the above list of compounds, prepare a sequence of reaction chain with suitable conditions and reactions.

The given table shows the compounds and their molecular formula. How can you convert P to Q, where Q is a compound in which two methyl groups are substituted at adjacent carbons? How is P obtained from T, where T is secondary alcohol? Write the reactions involved in the conversion of P into R and S?

Compounds — Molecular formula
P — C₃H₇Br
Q — C₆H₁₄
R — CH₂O
S — C₂H₄O
T — C₃H₈O

In the figure given below which one is correct?

What effect does calcium sulphate have on cement?

Which of the following products is obtained when nitrobenzene is electrolytically reduced?