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Quiz about Chemistry Anyone
Quiz about Chemistry Anyone

Chemistry Anyone? Trivia Quiz


A quiz to test your knowledge of chemistry.

A multiple-choice quiz by shawn888. Estimated time: 5 mins.
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Author
shawn888
Time
5 mins
Type
Multiple Choice
Quiz #
210,173
Updated
May 16 23
# Qns
10
Difficulty
Difficult
Avg Score
4 / 10
Plays
3026
- -
Question 1 of 10
1. Which of these is not a noble gas? Hint


Question 2 of 10
2. Which of these metals has the highest density? Hint


Question 3 of 10
3. Bromine is the only non-metal which is in the liquid state in room temperature.


Question 4 of 10
4. Which is the most abundant element in the Earth's crust? Hint


Question 5 of 10
5. Which elements are called bridge elements? Hint


Question 6 of 10
6. Which allotrope of phosphorus is the most stable? Hint


Question 7 of 10
7. Which metal has the lowest vapor pressure and the highest melting point? Hint


Question 8 of 10
8. Which of the following is used in making bullet-proof jackets? Hint


Question 9 of 10
9. Which element shows maximum radioactivity? Hint


Question 10 of 10
10. Which is the rarest naturally-occurring element on Earth? Hint



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Quiz Answer Key and Fun Facts
1. Which of these is not a noble gas?

Answer: hydrogen

Noble gases are so called because they are very inactive at normal temperature and pressure. They do undergo chemical reactions, but under extreme conditions. There are six noble gases in all. They are neon, argon, xenon, radon, krypton and helium. Hydrogen is the first element in the periodic table and has accumulated in the atmosphere due to its unreactive nature.
2. Which of these metals has the highest density?

Answer: iridium

Iridium has a density of 22.61 g/cc followed by osmium which is at 22.57 g/cc. Iridium has an atomic number 77 and is placed in the sixth period and ninth group of the modern periodic table.
3. Bromine is the only non-metal which is in the liquid state in room temperature.

Answer: true

Bromine is placed in the seventeenth group and fourth period of the modern periodic table. It is a member of the halogen group. It is a heavy, volatile reddish brown liquid and produces painful sores when spilled on the skin.
4. Which is the most abundant element in the Earth's crust?

Answer: oxygen

The most abundant element in the Earth's crust is oxygen which occupies 46.4% of the Earth's crust. silicon, aluminium and iron occupy 28.2%, 8.32% and 5.63% of the Earth's crust, respectively.

Oxygen is a Period 2 and Group 16 element occupying 21% of the Earth's atmosphere. It is a colorless gas and exists as a pale blue liquid. Oxygen is the third most abundant element found in the sun after helium and hydrogen and it plays a part in the carbon-nitrogen cycle. Mars contains .15% of oxygen. Ozone, an allotrope of oxygen shields the Earth from the harmful UV rays.

Figures courtesy: http.//www.webelements.com/webelements/
5. Which elements are called bridge elements?

Answer: Elements of the second period

Elements of the third period are called typical elements because they have characteristic properties of the group they belong to. Elements of the first and second group are called alkali metals and alkaline earth metals, respectively.

Period: The modern periodic table is divided into seven horizontal columns known as periods.

Group: The modern periodic table is divided into eighteen vertical columns known as groups.
6. Which allotrope of phosphorus is the most stable?

Answer: black

Phosphorus exists in mainly three allotropic forms which are black, white and red. Black is the most stable and white is the most unstable. Yellow phosphorus is mainly a mixture of white and red Phosphorus.

Allotropy: The property that certain chemical elements and compounds have of existing in two or more different forms is called allotropy. Sulphur has the most allotropes followed by carbon.
7. Which metal has the lowest vapor pressure and the highest melting point?

Answer: tungsten

Pure tungsten metal is a steel-gray to white metal. It has a melting point of 3653K. Due to this property it is used as filaments in electric bulbs. It oxidizes in air and must be protected at elevated temperatures. due to its unreactive nature.

Vapor pressure: The pressure exerted by a vapor in equilibrium with its solid or liquid phase.
8. Which of the following is used in making bullet-proof jackets?

Answer: boron carbide

Boron carbide or norbide is the hardest artificially prepared substance and is also a very good conductor of electricity. Due to its high hardness, boron carbide powder is used as an abrasive in polishing.
9. Which element shows maximum radioactivity?

Answer: radium

Pure radium is whitish in color, but turns black after sometime due to formation of radium nitrite. Radium is over a million times more radioactive than the same mass of uranium.

Radioactivity: The property of an element to spontaneously emit highly penetrating radiations and undergo self disintegration is called radioactivity.
10. Which is the rarest naturally-occurring element on Earth?

Answer: astatine

The longest-lived isotope, of mass number 210, has a half-life of 8.3 hours. There are about 20 isotopes known, all of which are radioactive, having very short half lives. Astatine is a halogen and accumulates in the thyroid like iodine.

Figures courtesy: http://www.webelements.com/webelements/
Source: Author shawn888

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