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

Metals found in a combined state in the earth's crust are known as:

  1. native metal

  2. minerals

  3. metalloids

  4. semi pure
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
A mineral is a naturally occurring chemical compound and has one specific chemical composition of metals and other elements in the combined state.
An ore is a type of rock that contains sufficient minerals with important elements including metals that can be economically extracted from the rock.
A native metal is any metal that is found in its metallic form, either pure or as an alloy, in nature.
A metalloid is any chemical element which has properties in between those of metals and nonmetals, or that has a mixture of them.
All ores are minerals but not vice-versa.
The metals found in the combined state in earth's crust are called minerals.
Multiple choice chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

Iron is mainly extracted from its oxide ores such as___________.

  1. Haemetite

  2. Magnetite

  3. Both a and b

  4. Ironide
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Iron is mainly extracted from its oxide ores such as haematite and magnetite. The iron extracted from these ores is mostly used in the manufacture of steel an alloy of iron. Iron is also an essential element found in biological systems.

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

Which of the following metal fall under platinum group?

  1. Silver

  2. Osmium

  3. Rhodium

  4. Both b and c
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The six platinum-group metals are ruthenium, rhodium, palladium, osmium, iridium, and platinum. They have similar physical and chemical properties,[clarification needed] and tend to occur together in the same mineral deposits.
So silver does not fall under platinum group.
Osmium and Rhodium both fall under platinum group.

Hence, option D is correct.
Multiple choice chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

Minerals that have a relatively high concentration of metal and can be extracted in an easy and cost-effective process are called:

  1. Metalloids

  2. Gold crust

  3. Ores

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

Minerals that have a relatively high concentration of metal and can be extracted in an easy and cost-effective process are called ores.

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

Which of the following are found in Earth's crust mainly as oxides, sulphides and carbonates?

  1. Metals above in the activity series

  2. Metals in the middle of the activity series

  3. Metals at the bottom of the activity series

  4. All of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The metals at the bottom of the activity series are the least reactive. They are often found in a free state. For example, gold, silver, platinum and copper are found in the free state. Copper and silver are also found in the combined state as their sulphide or oxide ores. The metals at the top of the activity series $(K, Na, Ca, Mg$ and $Al)$ are so reactive that they are never found in nature as free elements. The metals in the middle of the activity series $ (Zn, Fe, Pb, etc.)$ are moderately reactive. They are found in the earth’s crust mainly as oxides, sulphides or carbonates. The ores of many metals are oxides. This is because oxygen is a very reactive element and is very abundant on the earth.