Isotopes have the
same:
A) Atomic mass
B) Atomic number
C) Neutrons
D) None of these
Which method is/are used to separate components of a
mixture?
A) Filtration
B) Sublimation
C) Distillation
D) All of these
A chemical process that gives out heat is called………….
A) Combustion
B) Synthesis
C) Polymerization
D) Conduction
Explanation: Combustion is a chemical process in which a substance reacts rapidly with oxygen and gives off heat. The original substance is called the fuel, and the source of oxygen is called the oxidizer.
The attractive force
among molecules is stronger in……….
A) Liquid
B) Solid
C) Gas
D) All of these
