List of top Chemistry Questions

(c) (i) Arrange the following in the increasing order of their basic character in an aqueous solution:
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How will you bring about the following conversions in not more than two steps?
(i)Propanone to Propene
(ii)Benzoic acid to Benzaldehyde
(iii)Ethanol to 3-Hydroxybutanal
(iv)Benzene to m-Nitroacetophenone
(v)Benzaldehyde to Benzophenone
(vi) Bromobenzene to 1-Phenylethanol
(vii)Benzaldehyde to 3-Phenylpropan-1-ol
(viii)Benazaldehyde to a-Hydroxyphenylacetic acid
(ix)Benzoic acid to m-Nitrobenzyl alcohol

Draw diagrams showing the formation of a double bond and a triple bond between carbon atoms in $C_2H_4$ and $C_2H_2$ molecules.

0.16 g of dibasic acid requires 25 mL decimolar NaOH solution for complete neutralisation. The molecular mass of the acid is

A certain reaction proceeds in a sequence of three elementary steps with rate constants k1, k2 and k3. If the observed rate constant, Kobs, of the reaction is expressed as Kobs = K3 [K1/K2]^1/2, then what is the observed energy of activation of the reaction?

Justify that the following reactions are redox reactions:

$CuO(s) + H_2(g) \rightarrow Cu(s) + H_2O(g) $
$Fe_2O_3(s) + 3CO(g) \rightarrow 2Fe(s) + 3CO_2(g) $
$4BCl_3(g) + 3LiAlH_4(s) \rightarrow 2B_2H_6(g) + 3LiCl(s) + 3 AlCl_3 (s) $
$2K(s) + F_2(g) \rightarrow 2K+F^- (s) $
$4 NH_3(g) + 5 O_2(g) \rightarrow 4NO(g) + 6H_2O(g)$

In Ostwald's process for the manufacture of nitric acid, the first step involves the oxidation of ammonia gas by oxygen gas to give nitric oxide gas and steam. What is the maximum weight of nitric oxide that can be obtained starting only with 10.00 g. of ammonia and 20.00 g of oxygen?

A carbamate contains:

Catalytic dehydrogenation of primary alcohol will produce a:

A tetrapeptide possesses _____ peptide bonds and can be ______ into amino acids fragments

One of the following aldehydes undergoes Cannizzaro’s reaction and reduces the Schiff’s reagent, but does not reduce Fehling’s reagent. That is

Calculate the pH of the following solutions:
a) 2 g of TlOH dissolved in water to give 2 litre of solution.
b) 0.3 g of Ca(OH)₂ dissolved in water to give 500 mL of solution.
c) 0.3 g of NaOH dissolved in water to give 200 mL of solution.
d) 1mL of 13.6 M HCl is diluted with water to give 1 litre of solution

A binary compound has Y-atoms forming FCC unit cell and another type of X-atoms occupying 1/3^rd of tetrahedral voids. Find out the molecular formula of the compound.

How many of the following have 10 electrons: O^2-, O, Al³⁺, Al, F, F^-, Mg²⁺, Mg, N^-3

In the following reaction, ' $A$ ' is