Showing
6
question(s) for
ICSE Class 9
—
Subject:
Chemistry
Chemistry
Q1.
Define element.
Answer:
An element is a pure substance made of only one kind of atom.
Chemistry
Q2.
Define element.
Answer:
An element is a pure substance made of only one type of atom.
Chemistry
Q3.
What is a mixture?
Answer:
A mixture is a combination of two or more substances not chemically combined.
Chemistry
Q4.
Define alloy.
Answer:
An alloy is a mixture of two or more metals or a metal and non-metal.
Chemistry
Q5.
Define valency. (Q314)
Answer:
Valency is the combining capacity of an element.
Chemistry
Q6.
What is a chemical reaction? (Q414)
Answer:
A chemical reaction is a process where substances change into new substances.