Q.1
How many carbon atom/s are present in the compounds CaCO3?
  • 1
  • 2
  • 3
  • 4
Q.2
Is water an element or a compound?
  • Element
  • Compound
Q.3
Element is a
  • pure substance
  • compound
  • mixture
  • molecule
Q.4
Is salt (NaCI) a compound or a element
  • Compound
  • element
Q.5
Which one can be found on the periodic table
  • Compound
  • Element
Q.6
Which of the following represents an element?
  • H2O
  • H2
  • NaCl
  • CaCO3
Q.7
What is the formula for sulfur pentoxide?
  • SO2
  • SO3
  • SO4
  • SO5
Q.8
What is the formula for Sodium Nitrate? (refer to your polyatomic ions sheet)
  • NaN
  • NaN2
  • NaNO3
  • NaNO3
Q.9
What is the formula for Silicon dioxide?
  • SO
  • SO2
  • SiO
  • SiO2
Q.10
What is the name for MgH2?
  • Magnesium hydride
  • Magnesium dihydride
  • Monomagnesium hydride
  • Monomagnesium dihydride
Q.11
What is the name for CO?
  • Copper Oxide
  • Carbon monoxide
  • monocarbon oxide
  • Copper monoxide
Q.12
What is the formula for Lithium Iodide?
  • LiI
  • LiI2
  • LiI3
  • LiI4
Q.13
Rust & Tarnishing is ALWAYS and example of a chemical change/reaction?
  • True
  • False
Q.14
Which combination of letters could be used as a chemical symbol for an element?
  • BR
  • Chl
  • Dy
  • FeO
Q.15
How many Capital or Uppercase letters can one element have?
  • 5
  • 1
  • 3
  • 2
Q.16
CO2 , + H2O, + C6H12O+ O2Which of the following is a Compound?
  • Oxygen
  • Hydrogen
  • Water
  • Carbon
Q.17
What is a chemical property associated with wood?
  • ability to burn
  • snapping when bent
  • floating on water
  • having a rough surface
Q.18
CaCO3 heat CaO + CO2 The products above are best classified as -
  • two elements
  • one element and one compound
  • two compounds
  • two compounds and one element
Q.19
Carbon (C) is considered an element while Carbon Dioxide (COis considered a compound. That is because Carbon Dioxide is -
  • a gas
  • made of two elements
  • given off by plants
  • useful to us
Q.20
Which of the following is NOT evidence of a chemical reaction?
  • bubbling and fizzing
  • a precipitate forming
  • a phase change from a solid to a liquid
  • temperature change
0 h : 0 m : 1 s