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While writing a chemical equation, which of the following statements is incorrect?
Reactant is written on LHS.
Arrow shows the direction of the reaction.
Product is written on RHS.
Reaction conditions are mentioned after products.
Reaction conditions like temperature, pressure and catalyst are mentioned on the arrow.
Which law is obeyed by a balanced chemical equation?
Law of conservation of mass
Law of thermal equilibrium
Law of conservation of energy
Law of conservation of momentum
A balanced chemical equation obeys the law of conservation of mass.
How many oxygen atoms are there in 3Al2O3?
6
9
4
8
There are 9 oxygen atoms in 3Al2O3.
In the equation
a Al + b HCl → c AlCl3 + d H2↑ , the values of a, b, c and d are
a = 2, b = 6, c = 2, d = 3
a = 1, b = 3, c = 1, d = 3
a = 2 , b = 6, c = 2, d = 2
a = 2, b = 3, c = 2, d = 3
The balanced chemical equation is
2 Al + 6 HCl → 2 AlCl3 + 3 H2↑
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