Question
Match the following pH change and its effect.
Column A (Change)
Column B (Effect)
A. pH ↓ from 7 to 4
1. Increase in acidity
B. pH ↑ from 7 to 10
2. Acid rain forms
C. pH = 7
3. Neutral solution
D. pH < 5.6 in rain
4. Increase in basicity
Asked in RRB Group D · 2026
Acids Bases and Salts · Chemistry
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A solution with pH below 7 is acidic at 25°C; pH above 7 is basic.
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Questions Asked from Bases, Alkalis & the pH Scale in Previous Exams
See how often Bases, Alkalis & the pH Scale has appeared in previous-year questions across major government exams.
11UPSC Questions Asked in These Years:2010, 2011, 2012, 2013, 2014, 2020, 2021, 2022, 2023, 2024, 2026
10SSC Questions Asked in These Years:2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
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16State PSC Questions Asked in These Years:2002, 2004, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025
Bases, Alkalis & the pH Scale has appeared in 43 previous-year exam questions, most frequently in State PSC, UPSC and SSC.
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