Samacheer Kalvi 7th Science Is Matter Around Us Questions - 1

Question: 1

An element which is always lustrous, malleable and ductile

(A) Gas

(B) Metalloid

(C) Metal

(D) Non metal

Question: 2

Which of the following is a short and scientific way of representing one molecule of an element or compound?

(A) Chemical symbol

(B) Chemical formula

(C) Mathematics symbol

(D) Mathematical formula

Question: 3

The metals which is a liquid at room temperature

(A) Silver

(B) Mercury

(C) Chlorine

(D) Sulphur

Question: 4

Oxygen, hydrogen and sulphur are examples of which of the following?

(A) Metalloids

(B) Inert gases

(C) Metals

(D) Non metals

Question: 5

Which of the following is an example of a metal?

(A) Iron

(B) Water

(C) Oxygen

(D) Helium

Question: 6

A molecule which contains only one atom is called _____ molecule.

(A) Diatomic

(B) Triatomic

(C) Monoatomic

(D) None of these

Question: 7

_____ is the first scientist who used the term element.

(A) Robert hook

(B) Robertr boyle

(C) Einstein

(D) Newton

Question: 8

The smallest unit of an element is

(A) Atom

(B) Molecule

(C) Compound

(D) None of these

Question: 9

_____ is a substance that is made up of three oxygen atoms chemically combined.

(A) CO₂

(B) Ozone

(C) Oxygen

(D) Hydrogen

Question: 10

The graphite refill used in pencil is made of element called

(A) Sodium

(B) Silicon

(C) Graphite

(D) Carbon