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81
Why were nonviolent direct-action tactics effective during the U.S. Civil Rights Movement of the 1950s–1960s?
A. They avoided attracting national media attention and thus kept protests localized and private.
B. They exposed segregationist violence to national audiences and pressured federal authorities to intervene and legislate.
C. They immediately transformed Southern state governments into racially integrated administrations without federal laws.
D. They replaced all legal challenges with purely symbolic acts that required no legislative change.
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Correct Option
Explanation
Nonviolent protests attracted media coverage of brutal reactions, galvanising public opinion and prompting federal action such as civil rights legislation.
82
The 1952 Language Movement in East Pakistan was primarily triggered by which government decision?
A. the imposition of Islamic criminal codes in East Pakistan
B. the declaration of Urdu as the sole state language of Pakistan
C. the cancellation of provincial legislative sessions in East Bengal
D. the merger of East Pakistan with adjacent Indian provinces
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Explanation
The central government's promotion of Urdu as the sole state language sparked protests in East Pakistan demanding recognition of Bengali.
83
Which type of seismic wave generally causes the greatest destruction at Earth's surface during an earthquake?
A. Primary (P) waves
B. Secondary (S) waves
C. Body waves
D. Surface waves (Love and Rayleigh)
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Correct Option
Explanation
Surface waves (Love and Rayleigh) have larger amplitudes and longer durations at the surface, producing the most damage during earthquakes.
84
On the Mohs hardness scale, which mineral defines the lowest hardness value (1)?
A. Talc
B. Gypsum
C. Calcite
D. Quartz
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Explanation
Talc is the softest mineral and defines Mohs hardness 1, being easily scratched by all other minerals on the scale.
85
At room temperature (~20°C), sound travels fastest in which medium?
A. Air
B. Steel (solid)
C. Water (liquid)
D. Vacuum
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Explanation
Sound travels fastest in solids because of higher elastic modulus and density transmission properties; among the given options, steel (a solid) supports the highest speed.
86
Which cellular process generates the greatest amount of ATP per glucose molecule in aerobic eukaryotic cells?
A. Oxidative phosphorylation (electron transport chain and chemiosmosis)
B. Glycolysis
C. Citric acid (Krebs) cycle
D. Fermentation
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Explanation
Oxidative phosphorylation produces the majority of ATP (~26–34 ATP per glucose) via the electron transport chain and chemiosmosis, far exceeding glycolysis or the Krebs cycle alone.
87
What was the principal significance of Martin Luther’s 95 Theses (1517) for European history?
A. They initiated a public challenge to Church practices and papal authority, sparking the Protestant Reformation.
B. They called for the immediate abolition of all Church sacraments and monastic orders.
C. They established a new Catholic doctrine formally recognized by the papacy.
D. They promoted a unified German nation-state under the pope’s protection.
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Explanation
Luther’s theses attacked the sale of indulgences and questioned ecclesiastical authority, triggering debates that led to the Protestant Reformation.
88
During the Environmental Impact Assessment (EIA) process, the stage that determines whether a full EIA is required is called:
A. Mitigation.
B. Monitoring.
C. Reporting.
D. Screening.
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Correct Option
Explanation
Screening is the initial EIA stage used to decide if a project needs a full assessment, making option d correct.
89
Currently in which country there were massive protests against the economic crisis and oil shortage?
A. Kenya
B. Maldives
C. Indonesia
D. Sri-Lanka
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Explanation
As stated, Sri Lanka experienced massive protests driven by an economic crisis and shortages of fuel.
90
Which planet which is easily visible from the Earth?
A. Venus
B. Mercury
C. Mars
D. Jupitar
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Explanation
Venus is the brightest planet as seen from Earth and is easily visible near sunrise or sunset.
