INTERVIEW BASED QUESTIONS PART-04
INTERVIEW BASED QUESTIONS PART-04
1. Out of phenol and acetic acid, which is more acidic?
→Acetic acid is more acidic than phenol
2. Define Saponification.
→When an oil or fat is boiled with a solution of caustic soda, the resultant product are soap and glycerin.The chemical reaction is called saponification.
Oil + caustic soda ------🡪 soap + glycerin
3. Define pH.
→It is the negative logarithm of the activity of hydrogen ion.
pH = -log[H⁺] Or pH = -log[H3O⁺]
→potency of H+ in solution.
4. Give difference between aromatic and aliphatic hydrocarbons.
→
Aromatic Compound | Aliphatic Compound |
They are contain Aromatic ring or benzene ring. | They are organic chemical compound without benzene ring. |
They are always cyclic. | They are linear and cyclic. |
They are always unsaturated. | They are saturated and unsaturated. |
They are conjugated due to the presence of alternating double bond. | The majority of aliphatic compound are not conjugated. |
5. Define: - Valancy.
→The no. of unpaired electron removed or gained in the outer most shell to attained the stability, known as valancy.
e.g.Nitrogen -03, Carbon -04, Oxygen-02
6. Is Ammonia is base or acid?
→Ammonia is weak base because of lower conc. of H+ ion.
7. Give examples of weak acid and weak base.
→
|
Weak acid |
Weak Base |
|
HCOOH (formic acid) |
NH3 (ammonia) |
|
CH3COOH (acetic acid) |
C5H5N (pyridine) |
|
HF(hydrogen fluoride) |
NH4OH (ammonium hydroxide) |
|
H2S (hydrogen sulfide) |
N(CH3)3 (Trimethyl ammonia) |
8. Difference between Corrosion and erosion.
→Corrosion: - It is natural process in which degraded the useful property of material such as strength, structure. It occurs in metal but sometimes in polymer.
→Erosion: - it is action of surface process that removes soil, rocks or dissolves material from the one location to another.
9. What is optically active compound?
→A compound capable of rotating the place of vibration of polarized light to right & left used of molecule and atom.
10. What are inert gases? Why they are inert? Give the names of four inert gases.
→An inert gas is a gas which does not undergo chemical reactions under a set of given conditions.
→Inert gases are generally used to avoid unwanted chemical reactions degrading the sample.
→These undesirable chemical reactions are often oxidation & hydrolysis with oxygen and moisture in air.
→Purified ARGON and NITROGEN gases are most commonly used as inert gases. Other inert gases are NEONE, HELIUM, CO2.
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