Chemistry

In water gas shift reaction carbon monoxide is oxidized into carbon dioxide by treating it with steam in presence of catalyst.

For A
0.693/300 = (2.303/t) log (A? /A? )

For B
0.693/180 = (2.303/t) log (B? /B? )

Given A? = B? & A? = 4B?
Substituting & solving we get t = 900 s

At CMC, the particles cluster together through lyophobic end to form associated colloid called micelle. Further all lyophilic ends (polar head) get projected towards water.

B is least basic as lone pair of electron is present in resonance so as to make the system aromatic in nature
D is most basic as it results in formation of equivalent resonating structures upon attack of H?
Among A and C, the former is less basic as sp² hybridistion of nitrogen decrease its basic strength.
Hence option 3 follows

According to Aufbau's principal, the increasing energy of atomic orbitals for sixth period element follows the order
6s < 4f < 5d < 6p

The major functions of hormones are:

• Regulating Metabolism
• Controlling Growth and Development
• Managing Stress and Energy
• Regulating Sleep and Mood

Hormones present in the human body are:

• Thyrotropin-releasing hormone (TRH)

• Dopamine (prolactin-inhibiting hormones)

• Gonadotropin-releasing hormone (GnRH)

• Adrenal Glands

• Androgens

• Estrogen

• Inhibin

• Testosterone

• Gastrin

• Melatonin

Below is the list of hormones:

1. Cortisol
2. Estrogen & Progesterone
3. Aldosterone 
4. Insulin
5. Growth Hormone
6. Glucagon
7. Adrenaline (Epinephrine)
8. Thyroxine (T4) and Triiodothyronine (T3)
9. Melatonin

There are multiple factors that make the carbonyl group a strong ligand. Check the list below for the reasons.

• Unlike other alkyl ligands, it is an unsaturated compound.
• Due to its unsaturated nature, it has difficulty donating? electron density.
• It has a tendency to accept? (Pie) antibonding electrons.
• CO ligand acts as Lewis acid and donates a lone pair of electrons to form a metal-carbon bond.
• The? -acidic nature of CO gives a strong field and greater d-orbital splitting.

To understand the phenomenon behind this, have a close look at the formula of the first order reaction.

t1/2 = 0.693/k

Here, we can see that the half life is only dependent on k (rate constant) since there is no [A]' in the formula. Hence, we can easily conclude that the half life of a first order reaction is independent of the initial concentration [A]'.