Igcse Model Questions Vol1 2024 Chemistry Question 28

Practice objective / multiple choice question 28 from the 2024 Igcse Model Questions Vol1 Chemistry examination.

Igcse Model Questions Vol1 2024 Chemistry Objective / Multiple Choice Hard Difficulty
Question 28 IGCSE_MODEL_QUESTIONS_VOL1 • 2024 • CHEMISTRY • objective

A city emits \(2.5 \times 10^{10}\) kg of \(\mathrm{CO_2}\) each day. Over one year a tree‑planting programme plants \(1.2 \times 10^{6}\) trees, each of which absorbs 22 kg of \(\mathrm{CO_2}\) per year. (a) Calculate the net increase in the mass of atmospheric \(\mathrm{CO_2}\) after one year. (b) Express this increase as a change in parts per million (ppm), given that the total mass of the atmosphere is \(5.15 \times 10^{18}\) kg.

Answer Options

Correct Answer A. 9.12×10^12 kg; 1.77 ppm
B. 8.3×10^12 kg; 1.60 ppm
C. 9.5×10^12 kg; 1.85 ppm
D. 1.02×10^13 kg; 1.95 ppm
Correct Answer
A
Correct Option:
9.12×10^12 kg; 1.77 ppm

About This Question

This is Igcse Model Questions Vol1 2024 Chemistry Question 28. It is one of the objective questions from the 2024 Igcse Model Questions Vol1 Chemistry examination.

Difficulty level: Hard .

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