Ncert Solutions Chemistry Class 12th

The product "P" in the above reaction is:

0 Follower 25 Views

Contributor-Level 9

DIBAL-H at low temperature in a non-polar solvent, followed by hydrolysis, reduces esters to an aldehyde and an alcohol as a byproduct. The reaction shown is:

0 0

New answer posted

7 months ago

he products “A” and “B” formed in above reactions are:

0 Follower 6 Views

Contributor-Level 9

Kindly consider the following Image

0 0

New answer posted

7 months ago

Ga (atomic mass 70u) crystallizes in a hexagonal close packed structure. The total number of voids in 0.581 g of Ga is __________ *10²¹. (Round off to the nearest integer).
[Given: N? = 6.023 *10²³]

0 Follower 1 View

Contributor-Level 10

First, the number of unit cells in the given mass is determined. In an HCP structure, there are 6 atoms and 18 total voids (6 octahedral + 12 tetrahedral) per unit cell. Multiplying the number of unit cells by 18 gives the total number of voids. The result is14.9 x 10²¹, which is rounded.

0 0

New answer posted

7 months ago

Which of the following polymer is used in the manufacture of wood laminates?

0 Follower 2 Views

Contributor-Level 10

Urea-formaldehyde resin is used for wood laminates because of its durable and unbreakable properties.

0 0

New answer posted

7 months ago

The solubility of CdSO? in water is 8.0 * 10? mol L?¹. Its solubility in 0.01 M H?SO? solution is ________ * 10? mol L?¹. (Round off to the nearest integer).
(Assume that solubility is much less than 0.01 M)

0 Follower 2 Views

Contributor-Level 9

Solubility of CdSO? is water ; S = 8 * 10? M
Using Ksp = S²
Ksp = 64 * 10? M
Now,
CdSO? Cd²? + SO? ²?
in H? SO? (0.01M)
Ksp = [Cd²? ] [SO? ²? ]
64 * 10? = S? (S? + 0.01)
S? << 0.01
So, S? = 64 * 10? M.

0 0

New answer posted

7 months ago

Consider the above reaction where 6.1 g of Benzoic acid is used to get 7.8g of m- bromo benzoic acid. The percentage yield of the product is ________. (Round off to the nearest integer).
[ Given : Atomic masses : C: 12.0u, H:1.0u, O:16.0u, Br:80.0 u]

0 Follower 3 Views

Contributor-Level 9

Moles of benzoic acid = 6.1 / 121 = 0.05
Theoretical moles of m- bromobenzoic acid = 0.05
Observed moles of m- bromobenzoic acid = 7.8 / 200 = 0.039
% yield = (0.039 / 0.05) * 100 = 78%

0 0

New answer posted

7 months ago

In the above reaction, the reagent "A" is:

0 Follower 7 Views

Contributor-Level 10

0 0

New answer posted

7 months ago

In Tollen's test for aldehyde, the overall number of electron(s) transferred to the Tollen's reagent formula [Ag(NH?)?]? per aldehyde group to form silver mirror is ________. (Round off to the nearest integer).

0 Follower 5 Views

Contributor-Level 9

In Tollen's test for aldehyde, aldehyde is oxidized to carboxylic acid salt as:
R – CHO + H? O →R – COO? + 3H? + 2e?
So; 2e? are transferred per aldhyde group.

0 0

New answer posted

7 months ago

Kindly consider the following

0 Follower 1 View

Contributor-Level 10

0 0

New answer posted

7 months ago

A xenon compound 'A' upon partial hydrolysis gives XeO?F?. The number of lone pair of electrons present in compound A is ________. (Round off to the nearest integer).

0 Follower 2 Views