THIRD QUARTERLY ASSESSMENT IN PHYSICAL SCIENCE-SY-2022-2023
Quiz by Evangeline D. Tala
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- Q1
When the star has used up all its hydrogen fuel. Which of the following statements BEST describe stellar nucleosynthesis?
It is the formation of elements during a supernova explosion.
It is the formation of light elements such as hydrogen and helium.
It is the process by which elements are formed within stars.
It is the process by which elements are produced ingas clouds.
120s - Q2
Which of the following is TRUE about the formation of elements lighter than iron in the core of the stars?
I. When the elements combine, they release energy that can fuel the nuclear fusion reactions in the star.
II. When the elements combine, they produce a nucleus with a mass lower than the sum of their masses.
III. When there is an input of energy from nuclear fission reactions in the star, the elements are formed.
IV. When the elements combine, they produce a nucleus with a mass greater than the sum of their masses.
I
II
III
IV
120s - Q3
Which of the following shows the proper sequence of stages of stellar evolution of a low-mass star?
Main sequence star – protostar - red giant - whitedwarf
Main sequence star - red giant - white dwarf –protostar
Protostar - main sequence star - red giant - white dwarf
Protostar - main sequence star - white dwarf - red giant
120s - Q4
Which of the following is one of the products of the reaction?
120s - Q5
Synthetic elements with atomic numbers higher than that of Uranium (Z = 92).
Superheavy Elements
Transuranic Elements
Light Elements
Heavy Elements
120s - Q6
Which of the following DOES NOT match with each other?
Helium 3: Alpha Particle
CNO: Carbon Fusion Cycle
R-process: Supernova Explosion
Iron: Alpha Ladder
120s - Q7
Which of the following determines the polarity of a bond between two elements?
The difference in electronegativity between the two elements.
The number of valence electrons in the two elements.
The difference in first ionization energy between the two elements.
The type of bond between the two elements.
120s - Q8
The ability of an atom to attract a pair of electrons in a chemical bond is known as _____.
electronegativity
ionization energy
electron affinity
nuclear affinity
120s - Q9
Which of the following will be the solvent if a nonpolar substance dissolves in an unknown liquid?
Polar
Ionic
Both polar & nonpolar
Non-polar
120s - Q10
In the given molecule BeCl₂, Be is the central atom, while Cl₂ is the terminal atom surrounded by two bonding electrons and with no lone pairs. So, the general formula is _____ with a geometrical shape of _____
AX₂E₂; angular
AX₂; linear
AX₃; trigonal planar
AX₃E; trigonal pyramidal
30s - Q11
There are molecules that are polar in bond but non-polar in shape. Which of the following is a molecule with a polar bond and a nonpolar molecule?
CO2
O3
H₂O
N2
120s - Q12
Which of the following is TRUE about H2O?
Polar
Linear Structure
Low boiling point
Non-Polar
120s - Q13
Supposedly a hypothetical molecule has an electronegativity difference of 0.5, what is the type of chemical bond present?
Polar covalent
Nonpolar covalent
Hydrogen
Ionic
120s - Q14
Which of the following Intermolecular Forces of Attraction (IMFAs) is considered as the weakest?
Dipole-dipole
H-bonding
London Dispersion
Ion-dipole
120s - Q15
A molecule shape is a three-dimensional arrangement of atoms or bonding groups around a central atom. The molecular shape is governed by the valence shell electron repulsion (VSEPR) theory.
The first and second statements are true.
The first statement is false while the second statement is true.
The first statement is true while the second statement is false.
The first and second statements are false.
120s
