Zone refining is used for the purification of


A) Au

B) Ge

C) Ag

D) Cu

Correct Answer:
B) Ge


Part of solved Chemistry questions and answers : >> General Science >> Chemistry








Comments

No comments available




Similar Questions
1). The gas used for artificial ripening of green fruit is
A). Acetylene
B). ethane
C). carbon dioxide
D). acetylene
-- View Answer
2). The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?
A). 3 billion years
B). 100 years
C). 0.01 minute
D). 13 days
-- View Answer
3). The method that cannot be used for removing permanent hardness of water is
A). adding sodium carbonate
B). distillation
C). adding caustic soda
D). boiling
-- View Answer
4). The mineral containing both magnesium and calcium is
A). magnesite
B). calcite
C). carnallite
D). dolomite
-- View Answer
5). The main chemical constituent of clay is
A). silicon oxide
B). aluminium borosilicate
C). zeolites
D). aluminium silicate
-- View Answer


6). The major constituent of air is
A). nitrogen
B). carbon dioxide
C). oxygen
D). hydrogen
-- View Answer
7). The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is
A). 5x/36
B). 5x
C). 7.2 x
D). x/6
-- View Answer
8). The iron ore magnetite consists of
A). \( Fe_{2}O_{3} \)
B). Fe3OH4
C). FeCO3
D). 3Fe2O3 .. 3H2O
-- View Answer
9). The high reactivity of fluorine is due to
A). its high electro negativity
B). small size of fluorine atom
C). availability of d-orbitals
D). strong F-F bond
-- View Answer
10). The inexpensive and commonly used variety of glass is called soda glass. It is called so because
A). was used initially for making bottles of soda(carbonated drink)
B). is made using soda(sodium carbonate)
C). was initially used for storing sodium carbonate
D). is made using soda lime
-- View Answer