Global warming leads to: MCQ with Answer and Explanation

Question
Global warming leads to:
A. Reduction in CO₂ concentration
B. Climate change and rise in sea level
C. Cooling of the Earth
D. Decrease in sea level
Answer: Option B
Solution (By JKExamLibrary)
Global warming, caused by increased greenhouse gases, leads to melting of polar ice, thermal expansion of oceans, rise in sea level, and changes in weather patterns (climate change). It does not cool the Earth or decrease CO₂.
This question belongs to: Science chemistry

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Practice More chemistry Questions

Question #1
The acid used in car batteries is:
A. Sulphuric acid
B. Nitric acid
C. Hydrochloric acid
D. Phosphoric acid
Discuss

Correct Answer: Option A

Explanation:
Lead-acid batteries (used in automobiles) contain dilute sulfuric acid (H₂SO₄) with specific gravity around 1.25-1.30 when fully charged. It acts as electrolyte and participates in the electrode reactions. Nitric acid is a strong oxidizing agent, HCl is not used because it would produce chlorine, phosphoric acid is in some fuel cells but not lead-acid batteries.
This question belongs to: Science chemistry
Question #2
Which of the following is a saturated carbon compound?
A. C₃H₆
B. C₂H₄
C. C₂H₂
D. C₄H₁₀
Discuss

Correct Answer: Option D

Explanation:
C₄H₁₀ (butane) follows CnH₂n+2, indicating no double or triple bonds, i.e., saturated alkane. C₂H₄ is ethene (alkene), C₃H₆ could be propene or cycloalkane (but alkene formula), C₂H₂ is ethyne (alkyne). Saturated hydrocarbons contain only single bonds and undergo substitution reactions.
This question belongs to: Science chemistry
Question #3
Which of the following acids is considered a strong acid?
A. Acetic acid
B. Carbonic acid
C. Citric acid
D. Hydrochloric acid
Discuss

Correct Answer: Option D

Explanation:
Hydrochloric acid (HCl) dissociates completely in water, making it a strong acid. Acetic acid (CH₃COOH), carbonic acid (H₂CO₃), and citric acid are weak acids—they partially ionize. Other strong acids: H₂SO₄ (first dissociation), HNO₃, HBr, HI, HClO₄. Strong acids have very large Ka values. pH of 0.1 M HCl is about 1.
This question belongs to: Science chemistry
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