2
Q:

# Chloroform used as anaesthetic should be preserved in the dark in tightly stoppered bottles because otherwise

 A) it becomes coloured B) it gets evaporated in air C) it gets oxidised to phosgene D) it gets decomposed to chloropicrin

Answer:   C) it gets oxidised to phosgene

Explanation:

Chloroform, $\inline CHCl_{3}$ is easily oxidised to the highly poisonous gas known as phosgene or carbonyl chloride $\inline COCl_{2}$. Hence if it is used as anaesthetic it should be kept free from sunlight and air.

Subject: Chemistry
Q:

Select the correct statement (s).

 A) When energy is transferred to the system from the surrounding as work, the surrounding do work on the system and the value of work (W) positive. B) When energy is transferred from the system to the surrounding as work, work is done on the surrounding and the value of W is negative. C) Both (A) and (B) D) None of the above

Answer & Explanation Answer: C) Both (A) and (B)

Explanation:

Filed Under: Chemistry
Exam Prep: AIEEE

2 62
Q:

Triple point of water corresponds to

 A) 1 atm, 0°C B) 1 atm, 0.01°C C) 1 atm, 0 K D) 4.58 Torr, 0.01°C

Answer & Explanation Answer: D) 4.58 Torr, 0.01°C

Explanation:

Filed Under: Chemistry
Exam Prep: AIEEE

1 42
Q:

Which one of the following can be oxidised to the corresponding carbonyl compound:

 A) 2-methyl-2-hydroxy propane B) 2-hydroxy propane C) o-Nitrophenol D) Phenol

Answer & Explanation Answer: B) 2-hydroxy propane

Explanation:

Filed Under: Chemistry
Exam Prep: AIEEE

2 28
Q:

Ethanol is converted into ethoxy ethane,

 A) by heating excess of ethanol with conc. H2SO4 at 140°C B) by treating with conc. H2SO4 at room temperature C) by treating with conc. H2SO4 at 273 K D) by heating Ethanol with excess of conc. H2SO4 at 443 K

Answer & Explanation Answer: A) by heating excess of ethanol with conc. H2SO4 at 140°C

Explanation:

Filed Under: Chemistry
Exam Prep: AIEEE

1 71
Q:

What is the third most common gas found in the air we breathe ?

 A) Argon B) Neon C) Carbondioxide D) Hydrogen