FBISE 9th Class Chemistry Chapter 1 Fundamentals of Chemistry Short Questions Answers
FBISE 9th class Chemistry Chapter 1 Fundamentals of Chemistry Short Questions with answers are combined for all 9th class(Matric/ssc) Level students. Here You can prepare all Chemistry Chapter 1 Fundamentals of Chemistry short question in unique way and also attempt quiz related to this chapter. Just Click on Short Question and below Answer automatically shown. After each question you can give like/dislike to tell other students how its useful for each.
Class/Subject: 9th Class Chemistry
Chapter Name: Fundamentals of Chemistry
Board: Federal Board
Helpful For:
- Federal Boards 9th Class Chemistry Annual Examination
- Schools 9th Class Chemistry December Test
- Federal 9th Class Chemistry Test
- Entry Test questions related Chemistry
FBISE 9th Class Chemistry Chapter 1 Fundamentals of Chemistry Short Questions Answers
[toggle title=”Define Chemistry?” state=”close”]
Chemistry is the branch of science which deals with the composition, properties, chemical changes in matter, and the law and principles, which govern these changes.[/toggle]
[toggle title=”Define Industrial Chemistry?” state=”close”]
The branch of chemistry that deals with the methods and use of technology in the large-scale production of useful substances is called Industrial Chemistry.[/toggle]
[toggle title=”Write down the main postulates of Dalton’s atomic theory?” state=”close”]
i. All elements are composed of tiny indivisible particles called atoms.
ii. Atoms of a particular element are identical. They have the same mass and same volume.
iii. During chemical reactions atoms combine or separate or re-arrange. They combine in simple ratios.
iv. Atoms can neither be created nor destroyed.[/toggle]
[toggle title=”Define Element?” state=”close”]
An element is a substance that’s all the atoms have the same atomic number. A substance that cannot be converted to another simpler substance is called an element.[/toggle]
[toggle title=”Define mixture?” state=”close”]
An impure substance that contains two or more pure substances that retain their chemical characteristics is called a mixture.[/toggle]
[toggle title=”What is a Heterogeneous mixture?” state=”close”]
A mixture that consists of two or more visible different components is called a heterogeneous mixture.[/toggle]
[toggle title=”Define atomic number?” state=”close”]
The number of protons in the nucleus of an atom is known as its atomic number.[/toggle]
[toggle title=”Define mass number?” state=”close”]
The total number of protons and neutrons in an atom is known as its mass number.[/toggle]
[toggle title=”Define Physical Chemistry?” state=”close”]
The branch of chemistry that deals with the laws and theories to understand the structure and changes of the matter is called physical chemistry.[/toggle]
[toggle title=”Define Organic Chemistry?” state=”close”]
The branch of chemistry that deals with the substances containing carbon is called organic chemistry.[/toggle]
[toggle title=”Define Inorganic chemistry?” state=”close”]
The branch of chemistry that deals with the elements and their compound except organic compounds is called inorganic chemistry.[/toggle]
[toggle title=”Define Nuclear Chemistry?” state=”close”]
The branch of chemistry that deals with the changes that occur in atomic nuclei is called Nuclear Chemistry.[/toggle]
[toggle title=”Define Environmental Chemistry.” state=”close”]
The branch of chemistry that deals with the chemicals and toxic substances that pollute the environment and their adverse effects on human beings is called Environmental Chemistry.[/toggle]
[toggle title=”Define Analytical Chemistry?” state=”close”]
The branch of chemistry that deals with the methods and instruments determining the composition of matter is called Analytical Chemistry.[/toggle]
[toggle title=”Define relative atomic mass.” state=”close”]
The mass of an atom of an element relative to the mass of C-12 is called relative atomic mass.[/toggle]
[toggle title=”Define empirical formula with example.” state=”close”]
The simplest type of formula which shows the simplest whole-number ratio of atoms present in a compound is called the empirical formula. e.g. glucose has the simplest ratio of 1:2:1 of carbon, hydrogen, and oxygen respectively. Hence its empirical formula is CH2O.[/toggle]
[toggle title=”Define Molecular mass?” state=”close”]
Molecular mass is the sum of atomic masses of all atoms present in the molecule.[/toggle]
[toggle title=”Define formula mass.” state=”close”]
The sum of the atomic masses of all atoms in the formula unit of a substance is called formula mass.[/toggle]
[toggle title=”Define ion?” state=”close”]
Ion is a charged species formed from an atom of chemically bonded groups of atoms by adding or removing electrons.[/toggle]
[toggle title=”Differentiate between Cations and Anions.” state=”close”]
Cations: Positively charged ions are called Cations.
Anions: Negatively charged ions are called Anions.[/toggle]
[toggle title=”Define molecular ion?” state=”close”]
When a molecule loses or gains electrons, the resulting species is called a molecular ion.[/toggle]
[toggle title=”Define free radicals?” state=”close”]
A free radical is an atom, which has an unpaired electron and bears no electrical charge.[/toggle]
[toggle title=”What is a Homogeneous mixture?” state=”close”]
A mixture that has a uniform composition throughout is called a Homogeneous mixture.[/toggle]
[toggle title=”Define Bio Chemistry?” state=”close”]
It is the branch of chemistry in which we study the structure, composition, and chemical reactions of substances found in living organisms.[/toggle]
[toggle title=”What is the matter?” state=”close”]
Anything that has mass and occupies space is called matter. Matter can exist in any of the three states; solid, liquid, or gas.[/toggle]
[toggle title=”What is valency?” state=”close”]
The combining capacity of an element with other elements is called valency. For example valency of carbon is 4.[/toggle]
[toggle title=”What is the molecular formula?” state=”close”]
The formula of molecular substances that shows an actual number of atoms of each element present in a molecule of that substance is called the molecular formula.[/toggle]
[toggle title=”What is Avogadro’s number?” state=”close”]
Avogadro’s number is a collection of 6.02 x 1023 particles. It is represented by the symbol ‘NA’. Hence, the 6.02 x 1023 number of atoms, molecules, or formula units is called Avogadro’s number.[/toggle]
[toggle title=”Define a mole.” state=”close”]
A mole of defined as the amount (mass) of a substance that contains 6.02 x 1023 number particles (atoms, molecules, or formula units). It is abbreviated as ‘mol’ e.g. 6.02 x 1023 carbon atoms = 1 mole of carbon.[/toggle]
[toggle title=”Define Symbol?” state=”close”]
An abbreviation for the name of the element is called a symbol.[/toggle]
[toggle title=”What is an isotope?” state=”close”]
Atoms of an element having different mass numbers but the same atomic numbers.[/toggle]
[toggle title=”Define Chemical reaction.” state=”close”]
Representation of an element or a compound in terms of symbols is called chemical formula.[/toggle]
[toggle title=”What is the gram atomic mass of S-atoms?” state=”close”]
Mass of 1 mole of S-atoms = 32g[/toggle]
[toggle title=”Define gram formula mass?” state=”close”]
The formula mass of a substance expressed in grams is called gram formula mass.[/toggle]
[toggle title=”Define gram molecular mass?” state=”close”]
The molecular mass of a substance expressed in grams is called gram molecular.[/toggle]
