15 Jan
2016
Tuition Singapore Secondary Science Chemistry Tuition – Elements, Compounds and Mixtures
Tuition Singapore Secondary Science Chemistry Tuition – Elements, Compounds and Mixtures
Question 1
Which of the following sets contains only elements?
A. Hydrogen, brass and oxygen
B. Alcohol, sodium and seawater
C. Air, neon and oxygen
D. Mercury, carbon and neon
Question 2
Which of the following elements is the most abundant in air?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Argon
Question 3
Which of the following substances is not a compound?
A. Salt
B. Carbon monoxide
C. Helium gas
D. Steam
Answers:
Q1) D – All the elements can be found in the Periodic Table.
Q2) B – The percentage of nitrogen in air is 80 %.
Q3) C – Helium is an element
Please contact Mr Ong @ 9863 9633 or Angie @ 96790479 if you need help in Secondary Science Chemistry Tuition