Question

al
#USI.
D. Fill up the blanks with the correct choice given in brackets.
Carbonates of zinc, magnesium, and copper on
(roasting/calcination) give the
respective metal oxides.
2. The oxide of zinc is .... ....(basic/amphoteric).
3.
.... (Enzymes/Promoters) act as catalysts for the biochemical reactions taking
place in our body.
4. When paper, wood, or coal is burnt, it undergoes a
(physical/chemical)
change and releases a large amount of heat.
5. An upward arrow in a chemical equation depicts
(precipitate/evolution of gas)
ERI.​

Answer 1

প্রশ্ন টা কপি করে গুগোল করে নাও।