IPC Semester 1 Exam

Front

How many electrons do most elements want to have in their outer shell to be stable?

Back

8

Front

What is the formula to calculate speed?

Back

Speed = distance/time

Front

What is the left part of a chemical equation called?

Back

Reactants

Front

How many Mn atoms are found in the compound 3Cr(MnO4)6?

Back

18

Front

What is displacement in physics?

Back

The shortest distance from the initial to the final position of an object.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity (magnitude only), while velocity is a vector quantity (magnitude and direction).

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed.

Front

What is the unit of speed in the SI system?

Back

Meters per second (m/s)

Front

What does a chemical equation represent?

Back

A chemical equation represents the reactants and products in a chemical reaction.

Front

What is the significance of the coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of each substance involved in the reaction.