9th Chemistry Chapter One Fundamentals of Chemistry Solved MCQs Notes
Here you will get the 9th Chemistry Chapter One Fundamentals of Chemistry Solved MCQs Notes with Answers from the Sindh Textbook.
These notes will help students in securing top marks in the board examination and job tests.
Those candidates who are preparing for SSC Part-1 (Matric) board exam, are advised to prepare from here.
Because, We have shared 9th Class Physics, 9th Class English, 9th Class Biology and other subjects solved textbook exercise and notes.
For 9th Class Chemistry, We have created a separate category under name; "9th Class Chemistry Notes", where we shares Class 9 Chemistry solved MCQs, Questions and Textbook Exercise.
9th Class Chemistry MCQs with Answers
01. There are ________ known elements.
A. 101
B. 109
C. 118
D. 126
ANSWER.C
02. Atoms or Groups of Atoms with unpaired electrons are known:
A. Compounds
B. Mixture
C. Molecules
D. Free radicals
ANSWER.D
03. A gas contains ———— molecules per mole.
A. 6.022×10²³
B. 6×1024
C. 5.3×1024
D. 9×1027
ANSWER.A
04. Which one of these was the first to use opium as anesthesia?
A. Bu Ali Sina
B. Al-Beruni
C. Jabir-ibin-Haiyan
D. Al RaAzi
Answer: D
05. Which of the following gas is used as Fuel fo Rockets.
A. Chlorine
B. hydrogen
C. Helium
D. Neon
ANSWER.B
06. Which is the primary ingredient in toothpaste?
A. NaOH
B. NaHCO3
C. Na2CO3
D. H2O
ANSWER. B
07. The simplest ratio of elements in a formula is given by:
A. Empirical formula
B. Molecular formula
C. Formula Unit
D. Atomic Number
ANSWER. A
08. Which gas is studied by J-Black.?
A. hydrogen chloride
B. sulpherdioxide
C. carbondioxide
D. carbonmonodioxide
Answer: C
09. What is the relative atomic mass in grams:
A. Mole
B. Formula Unit
C. Candela
D. Tesla
ANSWER. A
10. One mole of water weighs:
A. 36g
B. 48g
C. 18g
D. 88g
ANSWER.C
Fundamentals of Chemistry: 1st Chapter Solved MCQs of Class-9th with Answers
11. What is the product of Mixing salt and water is:
A. Homogeneous
B. Heterogeneous
C. Colloidal
D. NilS
ANSWER. A
12. The investigation of the rules and regulations guiding how atoms and molecules interact during chemical reactions is known as:
A. Inorganic chemistry
B. Industrial chemistry
C. Physical chemistry
D. Analytical chemistry
Answer: C
13. Which of the following cannot be decomposed into simpler substances:
A. Compound
B. Solution
C. Element
D. Mixture
ANSWER. C
14. Which of the following is a compound:
A. Carbon
B. Salt
C. Argon
D. Iron
ANSWER.B
15. What is the valency of oxygen atom:
A. 6
B. 2
C. 4
D. 16
ANSWER. B
16. What is the Proton number of Carbon?
A. 7
B. 6
C. 9
D. 5
ANSWER.B
17. What is the charge on Neutrons?
A. +
B. –
C. No charge
D. Double Positive
ANSWER. C
18. Hydrochloric Acid is a —— molecule.
A. Homoatomic
B. Heteroatomic
C. Monoatomic
D. None of the above
ANSWER. B
19. The following equation describes the relationship between atomic mass and Atomic Number [z]:
A. A=Z+N
B. A=Z-N
C. A=Z
D. 2Z-N
ANSWER. A
Fundamentals of Chemistry: 1st Chapter Solved MCQs of Class-9th with Answers
20. One oxygen atom weighs ___ times as much as one hydrogen atom.
A. 12
B. 16
C. 22
D. 32
ANSWER. B
21. Which of these is a triatomic molecule?
A. HCl
B. H20
C. BF3
D. CCl4
ANSWER. B
22. What is the unit of Relative Atomic Mass?
A. amu
B. KJ/mol
C. Both
D. None of these
ANSWER. A
23. The amount of matter contained in a body is called its:
A. Mass
B. weight
C. Molecule
D. Atom
ANSWER. A
24. What is the molar mass of NaHCO3 is:
A. 84g
B. 44g
C. 40g
D. 66g
ANSWER.A
25. What is the Molar mass of CaCO3 is:
A. 100g
B. 96g
C. 64g
D. 52g
ANSWER. A
26. There are ________ types of mixtures.
A. 3
B. 8
C. 2
D. 6
ANSWER. C
27. ——— is a charged specie.
A. Ion
B. Molecule
C. Atom
D. None of the above
ANSWER. A.
28. Which of the following best describes a heterogeneous mixture _____?
A. Sand in water
B. Salt in water
C. Both
D. None
ANSWER. A
29. Alphabet ————– is used to represent the atomic number.
A. C
B. Z
C. V
D. P
ANSWER. B
30. The typical number of protons and electrons in an atom is _____.
A. Equal
B. Unequal
C. Cannot be determined
D. Unknown
ANSWER. A
Frequently Asked Questions (FAQs)
Why is chemistry often called the central science?
Chemistry is often called central science because it bridges the gap between physics, biology, and environmental science. It helps us understand the world around us from the behavior of molecules to the makeup of the universe.
What is the difference between accuracy and precision?
Precision and accuracy are terms used to describe the consistency of a measurement. Accuracy describes how near a measurement is to the genuine value. For instance, hitting the bullseye numerous times on a dartboard is precise, but striking the bullseye in its real centre is accurate.
How do I know the number of significant digits to use in my calculations?
The number of significant digits in a measurement is determined by the precision of the measuring instrument. When doing calculations with multiple measurements, the final answer should be rounded to the least number of significant digits in any of the measurements.
Why is balancing chemical equations important?
Balancing chemical equations is important because it follows the principle of conservation of mass, which states that matter cannot be created or destroyed. When balancing equations, it ensures that the same number of atoms are present on each side of the equation, preventing any matter from being lost.
What is the difference between an acid and a base?
Acids and bases are both aqueous solutions that have opposite characteristics. Acids have a pH less than 7 and release hydrogen ions in water while bases have a pH greater than 7 and release hydroxide ions in water.
0 Comments