Frequently Asked Questions
Name a metal which is soft and a non metal which is hard
Solution:
Explanation:
- Metals have the properties of being malleable, ductile, and sonorous.
- Nonmetals, on the other hand, have limited tensile strength and cannot support a lot of weight.
- In general, metals are hard and nonmetals are soft, although there are several exceptions.
- Mercury, for example, is a soft metal, but Diamond is a hard nonmetal.
Final answer:
Hence, a soft metal is mercury and a hard non-metal is diamond .
What is the common name and chemical name of the compound CaOCl2
Solution:
Answer:
- Common Name:- Bleaching Powder
- Chemical Name:- Calcium Hypochlorite
- It is an Inorganic Chemical Compound which is also known as Calcium oxychloride.
Final answer:
Common Name:- Bleaching Powder
Chemical Name:- Calcium Hypochlorite
State four differences between metals and non metals
Solution:
Explanation:
Metals:
- Metals are lustrous in nature i.e. have shiny appearance.
- Metals are good conductors of heat and electricity.
- Metals are malleable and ductile in nature.
- Metals have high melting and boiling points.
Non-Metals
- Non-metals are dull in appearance.
- These are poor conductors of heat and electricity except graphite.
- These are soft in nature and can exist in all three states of matter.
- Having low melting and boiling point.
Final answer:
Metals are lustrous while non-metals are dull, metals are good conductor of heat and electricity while non-metals are bad, malleable and ductile nature shown by metals while non-metals are soft.
What is meant by the reactivity series of metals
Solution:
Explanation:
The reactivity series is a collection of metals arranged in decreasing order of reactivity. As a result, the least reactive metal is placed at the bottom of the series, while the most reactive metal is positioned at the top.
Consider the following example:
Sodium, Potassium, Lithium, Calcium, Magnesium, Zinc, Iron and Copper.
Final answer:
Reactivity series is a collection of metals arranged in decreasing order of reactivity.
Cinnabar is an ore of
A: Zn
B: Sn
C: Pb
D: Hg
Solution:
Explanation:
- Ores are naturally occurring rocks of minerals that contain different valuable parts such as metals .
- Minerals are raw forms in which ores exist .
- Cinnabar is an ore of mercury (Hg) .
- It is composed of mercury sulfide (HgS) . It is a toxic chemical compound for humans .
- It is the biggest source of mercury in the world .
- Sulfides are converted into oxide ores by heating them in excess air . This process is called roasting .
Final answer:
The correct answer is D , i.e. , Hg .
