Chemistry Grade 11 Questions - @Educational_Questions 1. What was one of the key postulates of Dalton's Atomic Theory?
A) Atoms can be subdivided into smaller particles
B) Atoms of different elements are identical
C) Atoms combine in simple whole-number ratios to form compounds
D) Atoms have a variable mass
2. Which subatomic particle was discovered through the cathode ray tube experiment?
A) Proton
B) Electron
C) Neutron
D) Nucleus
3. The discovery of the nucleus was attributed to:
A) Rutherford
B) Thomson
C) Dalton
D) Bohr
4. What is the charge of a neutron?
A) +1
B) 0
C) -1
D) Variable
5. Which model of the hydrogen atom successfully explained atomic spectra?
A) Bohr Model
B) Rutherford Model
C) Thomson Model
D) Dalton Model
6. The Heisenberg Uncertainty Principle states:
A) It is impossible to know both the position and momentum of a particle simultaneously
B) Electrons occupy fixed orbits around the nucleus
C) Electrons exhibit wave-like behavior
D) Electrons have a dual nature
7. How many quantum numbers are needed to describe an electron in an atom?
A) 1
B) 2
C) 3
D) 4
8. What is the maximum number of electrons that can occupy the 3p subshell?
A) 2
B) 6
C) 8
D) 10
9. According to the Pauli Exclusion Principle, no two electrons in an atom can have the same:
A) Energy level
B) Spin quantum number
C) Principal quantum number
D) Angular momentum quantum number
10. Which type of chemical bond involves the sharing of electrons between atoms?
A) Ionic
B) Covalent
C) Metallic
D) Hydrogen
11. What is the geometry around a carbon atom in a molecule with sp3 hybridization?
A) Linear
B) Trigonal Planar
C) Tetrahedral
D) Octahedral
12. Metallic bonding is characterized by:
A) Sharing of electrons between atoms
B) Transfer of electrons from one atom to another
C) A "sea" of delocalized electrons
D) Strong electrostatic interactions between ions
13. The Kinetic Molecular Theory of Gases assumes that:
A) Gas particles have no volume
B) Gas particles are in constant motion
C) Gas particles do not exert any pressure
D) Gas particles have strong attractive forces
14. Boyle's Law describes the relationship between:
A) Pressure and Volume
B) Pressure and Temperature
C) Volume and Temperature
D) Volume and Amount of Gas
15. Which state of matter has a definite volume but no definite shape?
A) Solid
B) Liquid
C) Gas
D) Plasma
16. The rate of a chemical reaction is affected by:
A) Temperature only
B) Pressure only
C) Concentration of reactants, temperature, and presence of catalysts
D) Nature of the products
17. Reversible reactions reach a state of equilibrium when:
A) The reactants are completely consumed
B) The rate of the forward reaction equals the rate of the reverse reaction
C) The products are completely formed
D) The reaction stops
18. Which principle states that if a system at equilibrium is disturbed, it will shift to counteract the disturbance?
A) Avogadro's Principle
B) Le Chatelier's Principle
C) Boyle's Principle
D) Charles's Principle
19. Carboxylic acids contain which functional group?
A) -OH
B) -COOH
C) -CHO
D) -NH2
20. What is the general formula for an alcohol?
A) R-O-R'
B) R-OH
C) R-COOH
D) R-CHO
21. Which organic compound is responsible for the characteristic smell of fruits?
A) Ethers
B) Esters
C) Aldehydes
D) Carboxylic acids
22. Fats and oils belong to which class of organic compounds?
A) Alcohols
B) Carboxylic acids
C) Esters
D) Aldehydes
23. What process converts unsaturated fats into saturated fats?
A) Hydrolysis
B) Esterification
C) Hydrogenation
D) Saponification
24. In the nomenclature of alcohols, the suffix used is:
A) -ane
B) -ol
C) -al
D) -one
25. Which theory explains the formation of chemical bonds by the overlapping of atomic orbitals?
A) Valence Bond Theory
B) Molecular Orbital Theory
C) Lewis Theory
D) VSEPR Theory
Join our Educational Channels:
▬▬▬▬▬▬▬▬▬▬▬▬▬
📚JOIN:
@Educational_Question📚JOIN:
@Et_Study_Notes📚JOIN:
@Oromia_Educational_News📚JOIN:
@AmboIfaBoru📚JOIN:
@General_questions_always
