1. bromine is a a. black solid b. red liquid c. colourless gas d. highly inflammable gas 2. the hardest substance available on earth is a. gold b. iron c. diamond d. platinum 3. the variety of coal in which the deposit contains recognisable traces of the original plant material is a. bitumen b. anthracite c. lignite d. peat 4. tetraethyl lead is used as a. pain killer b. fire extinguisher c. mosquito repellent d. petrol additive 5. which of the following is used as a lubricant? a. graphite b. silica c. iron oxide d. diamond

1.  B.  red liquid

2. C.  diamond

3.  D.  peat

4.  D.  petrol additive

5.  D.  diamond

Explanation:

1.B

2.C

3.D

4.D

5.A

- "the acute form of diverticulitis can manifest itself with one or more severe attacks of infection and inflammation.

the inflammation of diverticulitis can eventually result in a bowel obstruction, which may cause constipation, thin stools, diarrhea, abdominal swelling or bloating, and abdominal pain."

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.