Question 81 : What is the chemical symbol of mercury
1. Mr
2. Mg
3. Hg
4. None of the above
View Answer   Discuss with Members

Question 82 : What is the atomic number of mercury
1. 32
2. 41
3. 63
4. 80
View Answer   Discuss with Members

Question 83 : Plastic is a type of
1. Polyester
2. Polymer
3. Acrylic
4. None of the above
View Answer   Discuss with Members

Question 84 : Which one element has the highest electronegativity value
1. Lithium
2. Nitrogen
3. Chlorine
4. Fluorine
View Answer   Discuss with Members

Question 85 : Which one element has the lowest electronegativity value
1. Fluorine
2. Chlorine
3. Francium
4. Radium
View Answer   Discuss with Members

Question 86 : Nylon is a type of
1. Polyamide
2. Polyolefin
3. Polyester
4. Acrylic
View Answer   Discuss with Members

Question 87 : Which one is the most dense liquid from the below
1. Water
2. Choloform
3. Gasolin
4. None of the above
View Answer   Discuss with Members

Question 88 : Normal rainwater is slightly acidic due to the presence of
1. Carbon dioxide
2. Sulphur dioxide
3. Methane
4. None of the above
View Answer   Discuss with Members

Question 89 : Normal rainwater has a pH level of
1. 3.2
2. 5.6
3. 6.3
4. 8.3
View Answer   Discuss with Members

Question 90 : What is the mass percentage of oxygen in carbon dioxide (CO2)
1. 30.50%
2. 50.90%
3. 65.80%
4. 72.70%
View Answer   Discuss with Members