Tag: non-metals

Quizzes (12) Questions (109)

Questions Related to non-metals

Multiple choice chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

Nitrogen and germanium are:

  1. metal and non-metal respectively

  2. metal and metalloid respectively

  3. non-metal and metalloid respectively

  4. non-metal and metal respectively
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hydrogen, oxygen, nitrogen etc. are non-metal and boron, silicon, germanium etc. are metalloids. On the basis of chemical and physical properties, elements are further classified into metals, non metals and metalloids.

Multiple choice chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

Mark the correct statement.

  1. Some metals are found in earth's crust in the free state

  2. Metals at the bottom of activity series are least reactive

  3. Gold, silver can never be found in free state

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Some metals are found in earth's crust in the free state. Some are found in the form of their compounds. The metals at the bottom of activity series are least reactive.

Multiple choice chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

Metals found at the top of the reactivity series are never found in free-state because

  1. They are less reactive

  2. They are highly reactive

  3. They are moderately reactive

  4. None of above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Metals found at the top of the reactivity series are never found in free-state as they are very reactive, e.g. K, Na, Ca, Mg and Al, etc.

Multiple choice chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

Which of the following are found as carbonate ore in nature?

  1. $Fe$
  2. $Mg$
  3. $Zn$
  4. $Pb$
Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
Explanation

 Carbonate ores are Magnesite $(MgCO _3)$, Dolomite $(CaCO _3MgCO _3)$, Calamine $(ZnCO _3)$, Malachite $(CuCO _3.Cu (OH) _2)$, Siderite $(FeCO _3)$, and Limestone $(CaCO _3)$.

A principal ore of lead is galena $(PbS)$.