2011, 2012, 2014, and 2016 Flashcards
Number of carbon atoms in olvanil
26
(Chemical formula: C26H43NO3)
Who discovered x-ray?
Wilhelm Conrad Roentgen
How many amino acids are there in human protein?
20
It is a chemical reaction that is executed in a series of steps and removes N-terminal amino acids in a sequential manner from a peptide or protein.
Edman degradation
What is the chemical formula of 11-tetradecenyl acetate?
C16H30O2
What is the product when ethanoyl chloride is reacted with propanol?
Ethyl propanoate
What is the primary use of ethylene?
Ripening of fruits
What is another name for bulk temperature?
Mixing-cup temperature
What is the method Wohler did to break the vital force theory in nature?
Heating of NH4Cl with AgCN to form urea.
(He was able to disprove the idea that organic compounds cannot be produced from inorganic reactants.)
What is the difference between catabolism, anabolism, and metabolism?
Catabolism - breakdown
Anabolism - growth
Metabolism - chemical process for the functioning of organs
Who discovered the carbon dating method?
Willard Libby
Where is the ozone layer located in the atmosphere?
Stratosphere
What is the solid part of the Earth’s crust called?
Lithosphere
Which among the below choices float in water?
Balsa wood
Ethylene glycol
Table salt
Ethanol
Balsa wood
What results from three alpha emissions and two beta emissions of Rn-222?
Lead-210
Fundamental class of reactions in which electron-rich nucleophile selectively bonds with or attacks the positive or partially positive charge of an atom or a group of atoms to replace a leaving group
Nucleophilic substitution
Which of the following is a synthetic dye?
a. Alizatrin
b. Melanin
c. Carotenoid
Carotenoid
One way of obtaining IR spectra of solids is
Nojul Mull process
What is the sign convention of enthalpy during endothermic reaction?
Positive
The position and the velocity of an object (particles, atom) cannot both be measured exactly, at the same time, even in theory.
Heisenberg Uncertainty Principle
What is another name for taurine?
Aminoethanesulfonate or 2-aminoethanesulfonic acid
Internal energy is composed of all energy in the system except:
Kinetic and potential energy
Which of the following is an example of pseudo-plastic fluid?
a. apple sauce
b. rubber latex
c. tap water
d. sewage sludge
apple sauce
It is a product of distillation of coal tar.
Phenol
What happens to the pH of carbonated drinks if it is opened in atmospheric condition?
Decrease
The range of melting points of fatty acids:
For saturated: 100 to 110 deg Celsius
For unsaturated: 70 to 85 deg Celsius
What happens to the enthalpy content of the real gases when it is throttled at constant temperature?
Stays constant
