Options:
- A. Zn / HCI
- B. SOCl2 / Pyridine
- C. PCI3
- D. PCI5
View Answer
B. SOCl2 / Pyridine
Chemistry
The process of fermentation of starch involve many enzymes the sequence of enzymes used are____________________?
Options:
- A. Diastase-maltase-zymase
- B. Zymase-maltase-diastase
- C. Maltase-diastase-zymase
- D. Diastase-zymase-maltase
View Answer
A. Diastase-maltase-zymase
Aluminium oxide is_________________?
Options:
- A. Acidic oxide
- B. Basic oxide
- C. Amphoteric oxide
- D. It does not exists
View Answer
C. Amphoteric oxide
Tincal is a mineral of___________________?
Options:
- A. A1
- B. Si
- C. B
- D. C
View Answer
C. B
Phosphorous acid upon thermal decomposition yields phosphoric acid and____________________?
Options:
- A. Phosphine
- B. Phosphorus
- C. Water
- D. Phosphorus pentoxide
View Answer
A. Phosphine
Which one of the following compounds usually smells like garlic ?
Options:
- A. P2O3
- B. P2O5
- C. H3PO3
- D. All have same smell
View Answer
A. P2O3
Which of the halogen can displace other three elements ?
Options:
- A. Flourine
- B. Chlorine
- C. Iodine
- D. Bromine
View Answer
A. Flourine
Which of the following statements is incorrect about halogens ?
Options:
- A. All are non-metals
- B. All the halogens have electronic conviguration ns2p5
- C. They have high electron attinity and ionization energy
- D. All the halogens react with noble gases to form their halides
View Answer
D. All the halogens react with noble gases to form their halides
In unsaturated hydrocarbons electrons favour___________________?
Options:
- A. less reactivity
- B. addition reactions
- C. substitution reactions
- D. none
View Answer
B. addition reactions
Raney nickel is prepared from ______________________ by treating with caustic soda?
Options:
- A. Ni-Cu alloy
- B. Ni-Fe alloy
- C. Ni-Al alloy
- D. Ni-Mg alloy
View Answer
C. Ni-Al alloy