GENERAL KNOWLEDGE

GK

CHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Chemical equations, such as seen above, model what occurs in chemical reactions. To do so accurately, chemical equations must be ‘balanced’. What does this mean and why is it an important characteristic of an accurate portrayal of chemical reactions?
A
The Law of Constantinople requires that any reaction must proceed in an even or ‘balanced’ fashion or reactants and products will decay and the reaction will fail.
B
Chemical reactions are best modeled through the use of an electronic balance to insure that just the right amounts of materials are blended.
C
Balancing a chemical equation simply means insuring that the same numbers of atoms of the elements which are involved in the reaction (reactants) are represented in the result of the reaction (products). This demonstrates that matter is not created nor destroyed in a chemical reaction.
D
To balance a chemical equation you must be certain that the subscripts next to element symbols in the reactant molecules add up to the subscripts of element symbols found in the product molecules. This is the law of matter.
Explanation: 

Detailed explanation-1: -Answer. The chemical equation must be balanced in order to obey the law of conservation of mass. A chemical equation is said to be balanced when the number of different atoms of elements in the reactants side equals the number of atoms in the products side. Balancing chemical equations is a trial-and-error process.

Detailed explanation-2: -As a consequence, chemical equations must be balanced, meaning that the number and kinds of atoms must be the same on both sides of the reaction arrow. The numbers placed in front of formulas to balance equations are called coefficients, and they multiply all the atoms in a formula.

Detailed explanation-3: -The chemical equation needs to be balanced so that it follows the law of conservation of mass. A balanced chemical equation occurs when the number of the different atoms of elements in the reactants side is equal to that of the products side.

Detailed explanation-4: -(i) Change in state. (ii) Change in colour. (iv) Evolution of gas. (v) Change in temperature.

There is 1 question to complete.