Question

1. Balancing of equations is based on
a. Avogadro number
b. principle of conservation of momentum
c conditions for a chemical reaction to take place
d. law of conservation of mass or matter
Identify the balanced equation in the following
a. SIO + Mg - Si + Mgo
b. Sio, + 2Mg --S1+ 2 Mgo
c. SiO + Mg - SiMgo,
d. SiO, + Mg - SiO 2Mgo
3. Correct statement about chemical displacement is,
a. less reactive element displaces more reactive element
b. a non-metal displaces more reactive non metal
c. more reactive element displaces less reactive element
d. evolution of heat when carbon is burnt in air​

Answer 1

1.law of conservation of mass and matter

2.a is the correct answer

3.d is the. answer