1. Answer :

   The nitrogen is bonded to three CH3 groups and has a lone pair, so the hybridisation is sp3.

2. Answer :

   Two positional isomer A and B & two Stereoisomer of each so, total 4 isomers.

Chemical Interview Questions

3. Answer :

   cyclotetrane, because of the double bonds are not conjugation

4. Answer :

   Number of Sigma bonds present in Benzene are same as Borazine (inorganic Benzene).

   no. of sigma bonds in Benzene= 12 (C6H6)
   no. of sigma bonds in Borazine= 12 (B3N3H6)

5. Answer :

   Kekule

BioChemistry Interview Questions

6. Answer :

   Rotenone, Azadirachtin are natural insecticides, synthetic routes are deveoped recently.

   DDT, Gammaxene were used but were scraped out as they pose health hazards and are insects are able sustain the max. dosages every year. Generally, Semio-chemicals, a class of compounds found in insects themselves are being studied and used as effective insecticides and warfare agents.

7. Answer :

   1. Monounsaturated fat: This is a type of fat found in a variety of foods and oils.
   2. Polyunsaturated fat: This is a type of fat found in plant-based foods and oils.They can be divided into two groups known as omega-3 fats and omega-6 fats.
   3. Omega-3 fatty acids: One type of polyunsaturated fat made up of mainly omega-3 fatty acids and may be beneficial to heart.
   4. Omega-6 fats decrease risk of heart disease when they are consumed in place of saturated and trans fats.
Analytical Chemistry Interview Questions

8. Answer :

   IN coordinate covalent bond electrons which are shared by both the atoms are comtributed by only one atom . This is otherwise known as dative bond.

   In covalent bond the electrons shared by both the atoms are contributed by both the atoms equally.

9. Answer :

   when alcohols reats with aminoacids esters are formed. The esters are volatile in contrast to free aminoacids.

   R-CH-COOH + H2O-C2H5 -> R-CH-COO-C2H5 + H2O
   NH2 NH2

Quality Control Chemist Interview Questions

10. Answer :

    Ligases are the group of enzymes that catalyse the transfer of a group from one kind of molecule to another. These are also called transferases.

11. Answer :

    its the structure of amino acid glacine

Chemical Engineering Interview Questions

12. Answer :

    temperature, pH, structure of compound i.e., whether the compd is straight chain or branched & molecular weight of compd.

Chemical Interview Questions

13. Answer :

    Geometrical isomerism is an example of stereo-isomerism.

    This occurs when substances have the same molecular formula, but a different arrangment of their atoms in space. There are three ways that this can happen:

    where there is a C=C bond in the molecule;
    where a molecule has rings; or
    where there is a >C=N bond.

14. Answer :

    Proteins are precipitated from aqueous solution by high concentrations of neutral salts. This is the'salting -out' process.

    Divalent and trivalent ions are more effective than univalent ions.

    The salts commonly used for this purpose are NA2SO4,(NH4) 2SO4 Magnesium salts, and phosphates.

15. Answer :

    When fats are hydrolysed with alkhali,the free fatty acids react with alkali to form metallic acids.these salts are soaps and this process is called saponification.

Polymer Chemistry Interview Questions

16. Answer :

    The quantitative measure of the affinity of a compound to lose or gain electrons is the redox potential.

17. Answer :

    Lithipone is a white pigment.it is amixture of BaSO4&ZnS.

Chemistry Interview Questions

18. Answer :

    Anti aromatic compounds follows 4npi electron rule and are cyclic compounds, planar, where as non aromatic are non planar or planar, cyclic or acyclic.

BioChemistry Interview Questions

19. Answer :

    • uv lamp range is 200 nm to 340 nm.
    • vis lamp range is 320 nm to 1100 nm.

    both of lamp range is mfg instument company voice of record is enculd the data range in lamp is 200 nm to 1200 nm.

20. Answer :

    If benzene and toluene mixed the boiling point will be ~ 90oC. Density will not change.

Chemical reaction Interview Questions

21. Answer :

    in p-nitrobenzoic acid due to -I effect of nitro group hydrogen present in acia become more elecronegative and easily remove as proton and act like strong acid.

22. Answer :

    There no difference between procedure, both are same. we generally term it as sulphated ash test/roi.in indian pharmacoepia, called it as roi and in usp, called it as sulphated ash tesh. both are used for the determination of content of inorganic matter in an organic substance.

23. Answer :

    high molecular weight easily we can seperate koH

24. Answer :

    PVC-POLYVINYL CHLORIDE AND uPVC IS THE Unplasticized polyvinyl chloride IT IS USED FOR building industry as a low-maintenance material.

Analytical Chemistry Interview Questions

25. Answer :

    Organic Chemistry is a branch of Science, which deals study about carbon compounds except Carbon monoxide, Carbon di oxide and corbonates.

26. Answer :

    Kerosine oil

27. Answer :

    An ion is a specie that have no unpaired electron and is charged, either positively or negatively i.e. may be a cation or an anion. It is formed due to heterolysis of a molecule

    e.g HCl----> H+ + Cl-

    A radical is a neutral specie having atleast one unpaired electron and is formed due to homolysis of a molecule

    e.g H-H -------> H* + H*

    The * shows an unpaired electron. Similarly CH3* is a radical.

Quality Control Chemist Interview Questions

28. Answer :

    from directly reaction of toluene to cromyl chloride (CrO2Cl2) at room temp. to form benzaldehyde.

29. Answer :

    Take 100ml water and pore 10gr NaOH pellets sterr with gently boil. NaOH sol ready.

30. Answer :

    By Fluorescein test ... where tartaric acid ' used in baking powder and found in many food products

    oxalic acid : harmful in contact with skin or eyes toxic .remove Ca ions From blood and also block Kidneys Fluoresce in test depended on Light passes & usually in UV light

Organic Chemistry 32-235 Practice Questions for Exam #2 Part 1: (Circle only ONE choice, circling more than one will be counted as wrong!) 4 points each 1. The List of 50 important Chemistry Questions and Answers is given here for download in PDF. Candidates those who are preparing for SSC CGL and all other competitive exams can use these questions. Feb 21, 2014  Analytical Chemistry Interview Questions; Question 25. What Mean By Organic Chemistry? Answer: Organic Chemistry is a branch of Science, which deals study about carbon compounds except Carbon monoxide, Carbon di oxide and corbonates. Which Organic Compound Is Used As A Fuel In Jet Air Crafts?

Related Topics

• 
  What is a penultimate carbon?
  Thepenultimate(second to lastcarbon)carbonis the last chiralcarbonof the chain. The alcohol group attached to thiscarbonis that which attacks the carbonyl during cyclization of a sugar.
  Thepenultimate(second to lastcarbon)carbonis the last chiralcarbonof the chain. The alcohol group attached to thiscarbonis that which attacks the carbonyl during cyclization of a sugar.
• 
  What is Galactosemia?
  Galactosemia is a rare genetic metabolic disorder that affects an individual's ability to metabolize the sugar galactose properly.GALACTOSE INTOLERANCE
  Galactosemia is a rare genetic metabolic disorder that affects an individual's ability to metabolize the sugar galactose properly.GALACTOSE INTOLERANCE
• 
  What are the most abundant pentoses?
  Scrous and glycogen has been a good game for the first few days and this game was
  Scrous and glycogen has been a good game for the first few days and this game was
• 
  What is an amylose?
  Thank you for the helpit is a pleasure
• 
  How would I make Propanone from Propan-2-ol?
  Propanone is more commonly known as Acetone. Acetone is mostly used to clean surfaces with it. Acetone is easily mixed with water. This is why it makes cleaning so easily. Acetone is used frequently in different lab experiments in organic chemistry.Some of the items that contain propanone are paint thinner and nail polish. Even though it seems that this compound is dangerous, it actually is made in the human body. Acetone can’t be seen and is quite flammable. Propan 2-ol is also known as Isopropyl alcohol.This has many similarities to propane including being colorless and it will catch fire easily. Also, to turn Propan-2-ol to Propanone, one would use potassium dichromate. Then you would dilute H2SO4 and then heat and distill it.
  Propanone is more commonly known as Acetone. Acetone is mostly used to clean surfaces with it. Acetone is easily mixed with water. This is why it makes cleaning so easily. Acetone is used frequently in different lab experiments in organic chemistry.Some of the items that contain propanone are paint thinner and nail polish. Even though it seems that this compound is dangerous, it actually is made in the human body. Acetone can’t be seen and is quite flammable. Propan 2-ol is also known as Isopropyl alcohol.This has many similarities to propane including being colorless and it will catch fire easily. Also, to turn Propan-2-ol to Propanone, one would use potassium dichromate. Then you would dilute H2SO4 and then heat and distill it.
• 
  Which of the following properties are most typical of organic compounds?
  Not soluble in water.......i think this is correct
  Which of the following properties are most typical of organic compounds?

  Not soluble in water.......i think this is correct
• 
  How is acetylene best described?
  How is it a alkyne if the suffix is ene and not yne?
  How is it a alkyne if the suffix is ene and not yne?
• 
  What are the reagents used in the production of ethanenitrile from Bromoethane?
  How do we get to that specific answer?Your help will be highly appreciated.
  What are the reagents used in the production of ethanenitrile from Bromoethane?

  How do we get to that specific answer?Your help will be highly appreciated.
• 
  What is the bond that joins 2 monosaccaride units together?
  What is the bond that joins 2 monosaccaride units together?
• 
  What are slucose and galactose?
  1. Aldoses
• 
  What was the Vital force theory and how did organic chemistry replace it?
  The vital force theory was put forward by Swedish chemist BERZELIUS in 1815. According to this theory, organic compounds could be produced only under the influence of some mysterious force existing in living organisms. This mysterious force was called vital force. Since such a mysterious force cannot be created artificially, it is impossible to synthesize organic compounds in the synthesize organic compounds in the laboratory.Organic chemistry is the subdiscipline for the scientific research of structure, properties, and the reaction of organic compounds and organic materials. Before the nineteenth century, chemists believed that compounds obtained from living organisms were endowed with a vital force that distinguished then from inorganic compounds. According to the abstraction of vitalism, organic matter was endowed with a “vital force.”
  What was the Vital force theory and how did organic chemistry replace it?

  The vital force theory was put forward by Swedish chemist BERZELIUS in 1815. According to this theory, organic compounds could be produced only under the influence of some mysterious force existing in living organisms. This mysterious force was called vital force. Since such a mysterious force cannot be created artificially, it is impossible to synthesize organic compounds in the synthesize organic compounds in the laboratory.Organic chemistry is the subdiscipline for the scientific research of structure, properties, and the reaction of organic compounds and organic materials. Before the nineteenth century, chemists believed that compounds obtained from living organisms were endowed with a vital force that distinguished then from inorganic compounds. According to the abstraction of vitalism, organic matter was endowed with a “vital force.”
• 
  Why are lattices so important in organic chemistry?
  A lattice is essential in organic chemistry because lattices utilize a regular arrangement of particles. These particles include atoms, ions, or molecule. When a substance is in its solid state, as a solid phase material, its particles are arranged to achieve minimum stored energy — the bonding of lattices. Ions are bonded, creating a giant molecular mesh.Molecules are attached with covalent bonding and intermolecular bonding, which forms an atomic lattice. Lattices are arranged to achieve minimum stored energy. Lattice energy is relevant to many practical properties including solubility, hardness, and volatility.
  Why are lattices so important in organic chemistry?

  A lattice is essential in organic chemistry because lattices utilize a regular arrangement of particles. These particles include atoms, ions, or molecule. When a substance is in its solid state, as a solid phase material, its particles are arranged to achieve minimum stored energy — the bonding of lattices. Ions are bonded, creating a giant molecular mesh.Molecules are attached with covalent bonding and intermolecular bonding, which forms an atomic lattice. Lattices are arranged to achieve minimum stored energy. Lattice energy is relevant to many practical properties including solubility, hardness, and volatility.

Organic Chemistry Questions Pdf

• Determine the configuration(R or S)as the stereogenic center in
  (R,S)
  (S,R)
  (R,R)
  (S,S)

• Which fuel, on combustion, does not form apollutant?
  petrol
  natural gas
  hydrogen
  diesel

• What type of atoms do carbohydrates contain
  Carbon, oxygen, hydrogen
  Carbon, hydrogen, nitrogen
  Carbon, oxygen, nitrogen

• Which of the following are constitutional isomers of trans-1,2 dimethylcyclopentane
  I,III ,IV
  II, IV ,V
  II, III ,V
  III, IV ,V

• The difference between Dakin oxidation and Baeyer-villager reaction is which one?
  The starting material for Dakin oxidation must have a -OH group.
  The starting material for Baeyer-Villager reaction must have a -OH group
  Dakin oxidation is conducted under basic condition.
  Both A and C

• Which of the following represents the most stable conformation of all cis-1,2,4-trimethylcyclohexane?
  D
  B
  A
  C

• Which of the following is the correct formula for propene?
  C4H10
  C3H8
  C4H8
  C3H6

• Why are large alkane molecules cracked to form smaller molecules?
  Alkanes with large molecules are not useful.
  Small alkane molecules can be polymerised.
  Crude oil does not contain small alkane molecules.
  To meet the demand for small alkane molecules.

• Ethanol is an example of a......
  Primary alcohol
  Secondary alcohol
  Tertiary alcohol
  Ketone

• P { margin-bottom: 0.08in; }P { margin-bottom: 0.08in; }Bromo ethane reacts with silver nitrite to give a) C2H5NO2 b) C2H5-O-NO c) C2H5Ag + NaBr d) C2H5NC
  Option 1
  Option 2
  Option 3
  Option 4

• Ethanol is an example of a......
  Primary alcohol
  Secondary alcohol
  Tertiary alcohol
  Ketone

• Identify total No of functional groups in given compounds?
  A-5,B-6,C-4,D-7,E-5,F-4,G-7,H-2
  A-7,B-5,C-4,D-6,E-5,F-6,G-7,H-6
  A-4,B-6,C-3,D-7,E-5,F-8,G-7,H-2
  A-3,B-6,C-2,D-7,E-5,F-4,G-67,H-2

• Alcohols
  Ethers
  Aldehydes
  Ketones
  Carboxylic acids
  Esters
  Amines

• What is the reagent used in the production of butan-1-ol from 1-Chlorobutane?
  KOH (Aq) or NaOH(aq)
  KOH (aq)
  KOH (Ethanolic)
  NaOH (aq)
  NaOH (Ethanolic)

• Which of the following are filter controls
  Cut off
  ADSR
  Resonance
  Rate

• Which of the following molecule(s) is/are not an alkane?I C10H22 II C6H6 III C2H5OH IV C6H12
  II only
  II and III only
  II, III and IV only
  III only

Free Chemistry Questions And Answers

• Which property is generally characteristic of an organic compound?
  Low melting point
  Ionic bonds
  Solubility in water
  Fast reactions