Question

The evolution of gas during a chemical reaction is shown by an arrow pointing downwards.
A) True
B) False

Answer 1

Hint: In chemistry, equations play a major role. In the reaction three things are main. There are reactants, products and reaction conditions. The reactants are always on the left side of the equation. If more than one reactant in the equation means by using plus sign. The products are always on the right side of the reaction. Something here also follows. More than one product by using plus sign. In between reactant products are used arrows to find the reaction direction in the equation.

Complete answer:
The given statement is
The evolution of gas during a chemical reaction is shown by an arrow pointing downwards.
True or false
In chemical reaction, generally two arrows will be used in the product side of the equation. One is upwards and the other is downwards arrows.
In general upwards arrows are used for evolution of the gas in the chemical reaction. In general, downwards arrows are used for precipitation of solid in the chemical reaction.
According to the above discussion, we conclude the evolution of gas during a chemical reaction is shown by an arrow pointing upwards.
Hence, the statement of the evolution of gas during a chemical reaction is shown by an arrow pointing downwards is wrong.
The evolution of gas during a chemical reaction is shown by an arrow pointing downwards. Is false.

So, the correct answer is “Option B”.

Note:
We must have to know that in balanced chemical reaction wise, we predict the side product of the reaction. In some cases we are not able to attain balance by changing the mole. In that case we use the number of countable ions in the product and reactant side of the chemical reaction. In chemistry, redox reaction is one of the types of major reactions. In this redox reaction two methods are used to attain the balanced chemical reaction. There are ion-electron methods and the oxidation number method.