Language of Chemistry Quiz - ICSE Class 8 Science

Free practice quiz: Language of Chemistry (ICSE Class 8 Science). 51 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This ICSE Class 8 Science practice quiz has 51 multiple-choice questions on Language of Chemistry, and 51 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. Which of the following is NOT a chemical symbol?

   1. H
   2. He
   3. Hy
   4. Hg
   Show answer

   Answer: C. Hy

   Chemical symbols are abbreviations for elements. 'H' represents Hydrogen, 'He' represents Helium, and 'Hg' represents Mercury. 'Hy' is not a recognized chemical symbol for any element.

2. The chemical formula for sulfuric acid is H₂SO₄. How many atoms are present in one molecule of sulfuric acid?

   1. 4
   2. 5
   3. 6
   4. 7
   Show answer

   Answer: D. 7

   The molecule contains 2 Hydrogen atoms, 1 Sulfur atom, and 4 Oxygen atoms. Total atoms = 2 + 1 + 4 = 7.

3. Which element has the chemical symbol 'Na'?

   1. Nickel
   2. Sodium
   3. Nitrogen
   4. Neon
   Show answer

   Answer: B. Sodium

   'Na' is the chemical symbol for Sodium.

4. If an atom has 9 protons and 10 neutrons, what is its atomic number?

   1. 9
   2. 10
   3. 19
   4. 90
   Show answer

   Answer: A. 9

   The atomic number is defined by the number of protons. An atom with 9 protons has an atomic number of 9.

5. What is the chemical formula for potassium chloride?

   1. KCl
   2. K₂Cl
   3. PCl
   4. KClO
   Show answer

   Answer: A. KCl

   Potassium (K) has a +1 charge and Chlorine (Cl) has a -1 charge. They combine in a 1:1 ratio to form KCl.

More questions in this quiz

Answers and explanations are in the full quiz.

1. If an element's atomic number is 12, which of the following statements is true about its electron configuration in its neutral state?
2. The chemical formula for water is H₂O. What does the subscript '2' indicate?
3. Which noble gas has the chemical symbol 'Ne'?
4. What is the correct chemical formula for sodium chloride?
5. The element with atomic number 17 is Chlorine. What is its valency?
6. Which of the following represents an ion?
7. What does the symbol 'Ca' represent?
8. If an element has a mass number of 23 and an atomic number of 11, how many neutrons does it have?
9. Which element has the chemical symbol 'Fe'?
10. Which of the following is a diatomic molecule?
11. What is the valency of Nitrogen (N) if its atomic number is 7 and it typically forms compounds where it gains 3 electrons?
12. The chemical symbol 'K' refers to which element?
13. Which of the following is a polyatomic ion?
14. If an atom has 8 protons and 9 neutrons, what is its mass number?
15. What is the chemical formula for carbon dioxide?
16. Which of the following elements is a halogen?
17. The symbol 'P' represents which element?
18. What is the number of valence electrons in an atom of Sulfur (atomic number 16)?
19. The chemical formula for methane is CH₄. What does this formula tell us?
20. What is the valency of Oxygen (O), which has an atomic number of 8 and typically forms compounds by gaining 2 electrons?
21. Which of the following is an example of a noble gas?
22. The chemical symbol 'Cl' represents which element?
23. If an element has atomic number 11, it is Sodium (Na). What is its typical ionic charge in compounds?
24. What is the chemical formula for carbon monoxide?
25. Which of the following elements belongs to Group 1 of the periodic table (alkali metals)?
26. The element with atomic number 6 is Carbon. What is its valency?
27. What does the symbol 'S' represent?
28. Which of the following is the chemical symbol for silver?
29. The chemical formula for calcium chloride is CaCl₂. This formula indicates:
30. An element has an electron configuration of 2, 8, 8, 1. What is its valency?
31. Which of the following is NOT a transition metal?
32. The chemical symbol 'Br' represents which element?
33. If an atom has 12 protons and 12 neutrons, what is its mass number?
34. What is the common ionic charge of Magnesium (Mg), which has an atomic number of 12?
35. Which of the following is a representation of an anion?
36. The chemical symbol 'Au' represents which element?
37. An element has an electron configuration of 2, 8, 8. What is its valency?
38. Which of the following elements is a halogen, located in Group 17?
39. What does the subscript '3' in the chemical formula Al₂(SO₄)₃ represent?
40. Which element has the chemical symbol 'Zn'?
41. If an atom has 15 protons, what is its atomic number and the element it represents?
42. What is the valency of Aluminium (Al), which has atomic number 13 and typically forms compounds by losing 3 electrons?
43. Which of the following is the chemical formula for ammonium ion?
44. The chemical symbol 'Pb' represents which element?
45. If an element has an atomic number of 19, which group does it belong to in the periodic table?
46. What is the chemical formula for magnesium hydroxide?

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