Answer: Option (C) is the correct answer.
Explanation:
Chemical formula of a secondary amide is R'-CONH-R, where R and R' can be same of different alkyl or aryl groups. Here, the hydrogen atom of amide is attached to more electronegative oxygen atom of the C=O group.
Therefore, the hydrogen atom will be more strongly held by the electronegative oxygen atom. As a result, there will be strongly hydrogen bonded in the liquid phase of secondary amide.
Whereas chemical formula of nitriles is RCN, ester is RCOOR' and acid chlorides are RCOCl. As no hydrogen bonding occurs in any of these compounds because hydrogen atom is not being attached to an electronegative atom.
Thus, we can conclude that secondary amides are strongly hydrogen bonded in the liquid phase.
Soil Formation<span>:- </span>Living<span> Organisms. Plants, animals, and micro-organisms (fungi and bacteria) all affect </span>soil formation<span> by producing or contributing to humus production. The amount of humus in a </span>soil<span> is a result of how much plant material has been incorporated into it.</span>
Answer:
Explanation:
94.91 nm = 1237.5 / 94.91 eV
= 13.038 eV
Energy of ground state = - 13.6 eV
Energy of higher state to which it jumped
= - 13.6 + 13.038
= - .562 eV
If n be the orbit to which it jumped
13.6 / n² = .562
n = 5 ( approx )
b )
1281 nm = 1237.5 / 1281
= .966 eV
Energy of second photon = 13.038 - .966
= 12.072 eV
Wavelength of second photon
= 1237.5 / 12.072
= 12.51 nm
b ) Energy of intermediate level
= - 0.562 - .966 eV
= - 1.528 eV
If it be n th level
13.6 / n² = 1.528
n = 3
The weight of a solid gold crown would be much heavier than one if not made of solid gold. It would also not tarnish as quickly as one of other metals.
Hope this helped!
2. chemical, thermal, and electromagnetic