Options:
- A. in silvery mirror
- B. in making medicine urotropine
- C. in making throat lozenges
- D. in making acetic acid
View Answer
D. in making acetic acid
Chemistry
Which of the following reactions may be assoclated with aldehyde and ketone ?
Options:
- A. nucleophile addition
- B. polymerization
- C. oxidation
- D. all of the above
View Answer
D. all of the above
Carbonates of lithium are not stable like that of sodium due to________________?
Options:
- A. Low electronegativity
- B. Low electropositivity
- C. Low charge density
- D. Not known yet
View Answer
B. Low electropositivity
Which one is least ionic in nature and decompose on heating ?
Options:
- A. LiOH
- B. NaOH
- C. KOH
- D. CsOH
View Answer
A. LiOH
Addition of 2% gypsum in cement________________?
Options:
- A. Triggers hydration
- B. Triggers hydrolysis
- C. Prevents rapid hardening
- D. all of the above
View Answer
C. Prevents rapid hardening
The hydrolysis of Benzenetrizonide will yield three moles of____________________?
Options:
- A. Glyoxime
- B. Benzaldehyde
- C. Glycol
- D. Glyoxal
View Answer
D. Glyoxal
Concept of Triads was introduced by_______________?
Options:
- A. Dobereiner
- B. Newland
- C. Mendeleev
- D. Al-Razi
View Answer
A. Dobereiner
True increasing order of acidity of the oxides of Mn is_________________?
Options:
- A. MnO < MnO2 < Mn2O7
- B. Mn2O7 > MnO2 > MnO
- C. MnO2 > MnO > Mn2O7
- D. MnO2 > Mn2O7 > MnO
View Answer
B. Mn2O7 > MnO2 > MnO
Which discovery caused a revision in the periodic law as stated by Mendeleev ?
Options:
- A. Location of nucleus by Rutherford
- B. Atomic number by Moseley
- C. X-rays by Roentgen
- D. Natural radioactivity by Henry Bacquerel.
View Answer
B. Atomic number by Moseley
The test which is used for the identification of amino-acids is_________________?
Options:
- A. Ninhydrin test
- B. Molisch test
- C. Biuretic test
- D. Benedict test
View Answer
A. Ninhydrin test