PAST BOARDS 2018

Question 1

The chemist who wom a nobel prize in 1944 for nuclear fission?

Answer 1

Otto Hahn

Question 2

Molecular Formula of DNA

Answer 2

G- C10 H22 O6 N5 P
C- C9 H12 O6 N3 P
T- C10 H13 O7 N2 P
U- C9 H 11 O7 N2 P

Question 3

What will you wear for protection against beta particles?

Answer 3

Aluminum

Question 3

Former name of element Antimony?

Answer 3

Stibium

Question 4

Process in which wastewater is subjected to air?

Answer 4

Activated sludge process

Question 5

Molecular Formula of Sucrose

Answer 5

C12H22O11

Question 6

Molecular formula of Urea

Answer 6

CH4N2O

Question 7

They are compounds that have the same molecular formula and different connectivity?

Answer 7

Constitutional Isomers

Question 8

The minimum amount of energy required to start a chemical reaction?

Answer 8

Activation Energy

Question 9

States that when stress is applied to a system in a state of equilibrium the system reacts in a way to reduce the stress

Answer 9

Le Chatelier’s Principle

Ex. Sunglasses

Question 10

What is Zeroth Law of Thermodyanamics?

Answer 10

States that if two bodies are each on thermal equilibrium w/ some third body, then they are also in equilibrium w/ each other

Question 11

Where was oil shark revovered?

Answer 11

Kerogen

Question 12

It hardens during the absorption of

Answer 12

Hydrated Lime