MCJ Sample Paper Chemistry – 1
(For Entry Test Class 1st Year)
1. Which of the following is not considered a fundamental particle in chemistry?
A) Proton
B) Electron
C) Neutron
D) Photon
2. The nucleus of an atom is composed of:
A) Protons and electrons
B) Neutrons and electrons
C) Protons and neutrons
D) Protons, neutrons, and electrons
3. The atomic number of an element is determined by the number of:
A) Neutrons in its nucleus
B) Protons in its nucleus
C) Electrons in its outer shell
D) Both protons and neutrons
4. Elements in the periodic table are arranged in order of increasing:
A) Atomic mass
B) Atomic number
C) Electron configuration
D) Valence electrons
5. The group number of an element in the periodic table represents the number of:
A) Protons in its nucleus
B) Neutrons in its nucleus
C) Valence electrons in its outer shell
D) Electrons in its inner shell
6. Which of the following elements is a noble gas?
A) Sodium
B) Helium
C) Oxygen
D) Carbon
7. The chemical symbol for iron is:
A) Ir
B) Fe
C) Au
D) Pb
8. A covalent bond is formed when atoms:
A) Gain or lose electrons
B) Share electrons
C) Transfer protons
D) Exchange neutrons
9. The chemical formula for water is:
A) H
B) HO
C) H2O
D) H3O
10. Which state of matter has a definite shape and volume?
A) Solid
B) Liquid
C) Gas
D) Plasma
11. The process of converting a solid directly into a gas is called:
A) Condensation
B) Sublimation
C) Evaporation
D) Fusion
12. What happens to the volume of a gas when the pressure is increased, assuming constant temperature?
A) Increases
B) Decreases
C) Remains constant
D) Varies unpredictably
13. The solute is the component of a solution that:
A) Dissolves another substance
B) Is present in the largest amount
C) Determines the state of matter
D) Can be separated by filtration
14. An aqueous solution is one in which the solvent is:
A) Water
B) Alcohol
C) Oil
D) Acid
15. Electrochemistry deals with the study of:
A) Chemical bonds
B) Chemical reactions in living organisms
C) Chemical reactions involving electricity
D) Chemical reactions in the presence of light
16. Which of the following is an example of a redox reaction?
A) Rusting of iron
B) Formation of water from hydrogen and oxygen
C) Combustion of gasoline
D) Dissolution of salt in water
17. The substance that undergoes reduction in a redox reaction is:
A) Oxidizing agent
B) Reducing agent
C) Electrolyte
D) None of the above
18. The chemical reactivity of an element depends primarily on its:
A) Atomic mass
B) Electron configuration
C) Group number
D) Atomic radius
19. Which of the following is a characteristic of alkali metals?
A) Low melting point
B) High electronegativity
C) Existence as diatomic molecules
D) Brittle nature
20. The outermost shell of an atom is also known as its:
A) Valence shell
B) Nucleus
C) Electron cloud
D) Atomic core
21. Which of the following elements is in the same period as oxygen?
A) Nitrogen
B) Sodium
C) Carbon
D) Fluorine
22. The most abundant element in the Earth’s crust is:
A) Oxygen
B) Carbon
C) Silicon
D) Hydrogen
23. An ionic bond is formed by:
A) Sharing electrons
B) Transferring electrons
C) Overlapping electron clouds
D) None of the above
24. Which of the following is not a property of a metal?
A) Malleability
B) Ductility
C) Low conductivity
D) Luster
25. The process of removing dissolved salts from water is called:
A) Filtration
B) Distillation
C) Evaporation
D) Desalination
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