General
✓✗Which of the following burns by producing a yellow, sooty flame?
- natural gas
- coke
- wax
- charcoal
General
✓✗In conversion of wine to vinegar
- ethanol is reduced to acetic acid
- methanol is oxidized to acetic acid
- ethanol is oxidized to acetic acid
- methanol is reduced to acetic acid
General
✓✗Alkaline hydrolysis of an ester is known as :
- esterification
- saponification
- hydration
- hardening
General
✓✗Which country first used ethanol as an additive in petrol ?
- India
- USA
- Bangladesh
- Brazil
General
✓✗The substance which can produce brisk effervescence with baking soda solution is
- Ethanol
- Vegetable oil
- Vinegar
- Soap Solution
General
✓✗Sodium chloride is added in soap making because
- it helps in good lather formation
- it increases the quality of soap
- it helps in precipitation of soap
- it separates unwanted impurities
General
✓✗An alkyne has seventy five carbon atoms in its molecule. The number of hydrogen atoms in its molecule will be
- 150
- 148
- 152
- 146
General
✓✗Number of carbon atoms in Buckminsterfullerene is
- 40
- 60
- 80
- 100
General
✓✗60 carbons of Buckminsterfullerene are arranged in
- 5 hexagonal and 15 pentagonal rings
- 20 hexagonal and 12 pentagonal rings
- 10 hexagonal and 5 pentagonal rings
- 10 hexagonal and 20 pentagonal rings
General
✓✗Methanol is harmful because it
- is a strong acid
- is radioactive
- damages the optic nerve and can cause blindness
- causes tooth decay