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The Language of Chemistry - 1

Fundamental chemistry concepts including chemical formulas, atomic mass units, valency, radicals, and chemical nomenclature for introductory chemistry students.

17 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

What does the chemical symbol 'Cl2' represent?

  1. An atom of chlorine
  2. An isotope of chlorine
  3. A molecule of chlorine
  4. An isobar of chlorine
Question 2 Multiple Choice (Single Answer)

1 a.m.u. is equivalent to

  1. $\frac{1}{12}$th of mass of carbon atom
  2. $\frac{1}{6} th$ of mass of carbon atom
  3. $\frac{1}{4}th$ of mass of carbon atom
  4. $\frac{1}{16}th$ of mass of carbon atom
Question 3 Multiple Choice (Single Answer)

Which of the following is atomic mass of an atom with 12 neutrons, 10 electrons and 10 protons?

  1. 12 U
  2. 22 U
  3. 20 U
  4. 32 U
Question 4 Multiple Choice (Single Answer)

Which of the following is not a correct formula of the given compound?

  1. Acetic acid - $CH _3$ COOH
  2. Slaked lime - $Ca\left(OH\right)_2$
  3. Aluminium oxide - $AlO _3$
  4. Potassium carbonate - $K _2CO _3$
Question 5 Multiple Choice (Single Answer)

Which of the following cannot be depicted from the chemical formula of a compound?

  1. Molecular weight of a compound
  2. Number of atoms in a compound
  3. Ratio of weights of elements in a compound
  4. Nature of bonds between elements in a compound
Question 6 Multiple Choice (Single Answer)

Which of the following is not indicated by the formula 'CO2'?

  1. Molecular weight of carbon dioxide is 44.
  2. Carbon dioxide contains 32 parts by weight of carbon.
  3. Carbon atom is joined with the oxygen atoms by chemical bonds.
  4. There are three atoms in the molecule.
Question 7 Multiple Choice (Single Answer)

What is the valency of iron in ferrous oxide?

  1. -2
  2. -3
  3. +3
  4. +2
Question 8 Multiple Choice (Single Answer)

Which of the following shows variable valencies?

  1. Copper
  2. Sodium
  3. Chlorine
  4. Calcium
Question 9 Multiple Choice (Single Answer)

What is the name of the compound HgO?

  1. Hydragyrium oxide
  2. Mercurous oxide
  3. Mercuric oxide
  4. Hydragyric oxide
Question 10 Multiple Choice (Single Answer)

Which of the following statements is true for NaCl?

  1. Sodium forms acidic and positive radical.
  2. Chlorine forms basic and positive radical.
  3. Sodium forms positive and basic radical.
  4. Chlorine forms negative and basic radical.
Question 11 Multiple Choice (Single Answer)

Which of the following is a simple radical?

  1. $(PO^3)^{-9}$
  2. $OH^{-1}$
  3. $SO_4^{2-}$
  4. $Pt^+4$
Question 12 Multiple Choice (Single Answer)

Which of the following is a simple bivalent electronegative ion?

  1. SO$4^{2-}$
  2. N-3
  3. S-2
  4. CN-1
Question 13 Multiple Choice (Single Answer)

Which of the following statements is true regarding HCO$3^-$?

  1. It is simple, electronegative and basic radical.
  2. It is simple, electronegative and acidic radical.
  3. It is compound, electronegative and basic radical.
  4. It is compound, electronegative and acidic radical.
Question 14 Multiple Choice (Single Answer)

Which of the following is a basic radical?

  1. Hydroxide
  2. Peroxide
  3. Argentic
  4. Arsenate
Question 15 Multiple Choice (Single Answer)

Which of the following elements will form acidic radical?

  1. Tin
  2. Platinum
  3. Arsenic
  4. Gold
Question 16 Multiple Choice (Single Answer)

Which of the following is true regarding sodium carbonate compound?

  1. Compound consists of two atoms, i.e. sodium and carbonate.
  2. Valency of carbonate in the compound is - 2.
  3. Two different elements form this compound.
  4. Valency of sodium in sodium carbonate is + 2.
Question 17 Multiple Choice (Single Answer)

The valency of phosphorous is 3, but that of oxygen is 2. What will be the molecular formula of phosphorous oxide?

  1. $P_3O_2$
  2. $2PO_3$
  3. $P_2O_3$
  4. $3PO_2$
  5. $P_4O_10$
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