2011, 2012, 2014, and 2016

Question 1

Number of carbon atoms in olvanil

Answer 1

26

(Chemical formula: C26H43NO3)

Question 2

Who discovered x-ray?

Answer 2

Wilhelm Conrad Roentgen

Question 3

How many amino acids are there in human protein?

Answer 3

20

Question 4

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.

Answer 4

Edman degradation

Question 5

What is the chemical formula of 11-tetradecenyl acetate?

Answer 5

C16H30O2

Question 6

What is the product when ethanoyl chloride is reacted with propanol?

Answer 6

Ethyl propanoate

Question 7

What is the primary use of ethylene?

Answer 7

Ripening of fruits

Question 8

What is another name for bulk temperature?

Answer 8

Mixing-cup temperature

Question 9

What is the method Wohler did to break the vital force theory in nature?

Answer 9

Heating of NH4Cl with AgCN to form urea.

(He was able to disprove the idea that organic compounds cannot be produced from inorganic reactants.)

Question 10

What is the difference between catabolism, anabolism, and metabolism?

Answer 10

Catabolism - breakdown
Anabolism - growth
Metabolism - chemical process for the functioning of organs

Question 11

Who discovered the carbon dating method?

Answer 11

Willard Libby

Question 12

Where is the ozone layer located in the atmosphere?

Answer 12

Stratosphere

Question 13

What is the solid part of the Earth’s crust called?

Answer 13

Lithosphere

Question 14

Which among the below choices float in water?

Balsa wood
Ethylene glycol
Table salt
Ethanol

Answer 14

Balsa wood

Question 15

What results from three alpha emissions and two beta emissions of Rn-222?

Answer 15

Lead-210

Question 16

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

Answer 16

Nucleophilic substitution

Question 17

Which of the following is a synthetic dye?

a. Alizatrin
b. Melanin
c. Carotenoid

Answer 17

Carotenoid

Question 18

One way of obtaining IR spectra of solids is

Answer 18

Nojul Mull process

Question 19

What is the sign convention of enthalpy during endothermic reaction?

Answer 19

Positive

Question 20

The position and the velocity of an object (particles, atom) cannot both be measured exactly, at the same time, even in theory.

Answer 20

Heisenberg Uncertainty Principle

Question 21

What is another name for taurine?

Answer 21

Aminoethanesulfonate or 2-aminoethanesulfonic acid

Question 22

Internal energy is composed of all energy in the system except:

Answer 22

Kinetic and potential energy

Question 23

Which of the following is an example of pseudo-plastic fluid?

a. apple sauce
b. rubber latex
c. tap water
d. sewage sludge

Answer 23

apple sauce

Question 24

It is a product of distillation of coal tar.

Answer 24

Phenol

Question 25

What happens to the pH of carbonated drinks if it is opened in atmospheric condition?

Answer 25

Decrease

Question 26

The range of melting points of fatty acids:

Answer 26

For saturated: 100 to 110 deg Celsius
For unsaturated: 70 to 85 deg Celsius

Question 27

What happens to the enthalpy content of the real gases when it is throttled at constant temperature?

Answer 27

Stays constant