Question

1- The reaction in which two compounds exchange their ions to form two new compounds is called
A) Displacement reaction
B) Combination reaction
C) Double displacement reaction
D) Redox reaction

2- Which of the given statements is not a physical change?
A) Boiling of water to give water vapour
B) Melting of ice to give water
C) Dissolution of salt in water
D) Combustion of Liquefied Petroleum Gas (LPG)

Answer 1

Answer:

1. Double decomposition reaction

2. Combustion of LPG

Answer 2

Answer:

correct answer is a ,c and e. Chinese cultivation was started near to major river, workers made baskets and other made clothes and pots, and most Chinese people worship their ancestors rather than gods.correct answer is a ,c and e. Chinese cultivation was started near to major river, workers made baskets and other made clothes and pots, and most Chinese people worship their ancestors rather than gods.correct answer is a ,c and e. Chinese cultivation was started near to major river, workers made baskets and other made clothes and pots, and most Chinese people worship their ancestors rather than gods.correct answer is a ,c and e. Chinese cultivation was started near to major river, workers made baskets and other made clothes and pots, and most Chinese people worship their ancestors rather than gods.correct answer