0
Q:

# Alum is used

 A) as an analgesic B) in the purification of water C) as a fertilizer D) as a disinfectant

Answer:   B) in the purification of water

Explanation:

Alum is common alum, potassium alumimium sulphate $\inline [K_{2}SO_{4}.Al_{2}(SO_{4})_{3}.24H_{2}O]$ which makes colloidal suspended impurities in water such as clay to settle down.

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

Explanation:

Filed Under: Chemistry
Exam Prep: AIEEE

2 61
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

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

Explanation:

Filed Under: Chemistry
Exam Prep: AIEEE

2 27
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