Tag: non-metals

Quizzes (12) Questions (109)

Questions Related to non-metals

Multiple choice chemistry non-metals dihydrogen fuel dihydrogen as a fuel introduction to hydrogen

The usage of dihydrogen is:

  1. It acts a a fuel cell

  2. Energy is distributed in the form of dihydrogen

  3. It is economical fuel

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Dihydrogen fuel is a zero-emission fuel when burned with oxygen (if one considers water not as an emission) or used in a contained cell. The energy released enables hydrogen to act as a fuel. In an electrochemical cell, that energy can be used with relatively high efficiency.

Multiple choice chemistry non-metals dihydrogen fuel dihydrogen as a fuel introduction to hydrogen

Hydrogen gas is:

  1. has high molecular weight.

  2. a medium for storage of energy

  3. excellent fuel

  4. both B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hydrogen is not found in pure form on Earth, however, so it must be produced from other compounds such as natural gas, biomass, alcohols or water. In all cases it takes energy to convert these into pure hydrogen. For that reason, hydrogen is really an energy carrier or storage medium rather than an energy source in itself.

Multiple choice chemistry non-metals dihydrogen fuel dihydrogen as a fuel introduction to hydrogen

Basic principle of hydrogen economy is:

  1. transportation of energy in the form of liquid or gaseous dihydrogen

  2. storage of energy in the form of liquid or gaseous dihydrogen
  3. both $A$ and $B$

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

The usage of hydrogen as a low-carbon energy source, such as gasoline as a transport fuel, it is referred to as "Hydrogen economy". The basic principles of Hydrogen economy are:-

(i) Storage of energy in the form of liquid or gaseous dihydrogen.
(ii) transportation of energy in the form of liquid or gaseous dihydrogen.
Thus the answer is both (A) and (B).

Multiple choice chemistry non-metals carbon dioxide - an oxide of carbon component of air - carbon dioxide oxides of non metal

Dissolved air contains a higher percentage of oxygen than ordinary air.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Dissolved air has a higher percentage of oxygen as compared to ordinary air. Air dissolved in water contains 36% oxygen as compared to 21% in air. This is because oxygen in the air has a higher solubility than other elements in air and also there is hydrogen bonding between water and oxygen that increases its solubility.

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

Which statement is false?

  1. Elements of VB group are transition elements

  2. Elements of VA group are all metalloids

  3. Elements of IA and IIA groups are metals

  4. Elements of IVA group are neither strongly electronegative nor strongly electropositive
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In element of $VA$ only arsenic and antimony are metalloids where as nitrogen and phosphorus are non metal. Bismuth and moscovium are metal.

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

Which of the following is the most reactive metal?

  1. Copper

  2. Gold

  3. Silver

  4. Francium
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Francium, right on the bottom of the group one of periodic table. As we know,size of the atoms increases as you go down a column and decreases as you go across the table. The larger the atom, the easier is to get rid of the valence electrons and easier to react with other atoms. Now if you look at the periodic table, francium has the largest radius therefore it is the most reactive element.