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GATE 2024 ES question paper with official answer key
The complete GATE 2024 Environmental Science and Engineering (ES) paper: 65 questions for 100 marks, with the official answer to every question. Try each question first, then open its answer, or practise the whole paper free with a 3-hour timer and your score.
GATE 2024 ES paper at a glance
- Questions
- 65
- Total marks
- 100
- General Aptitude
- 10 questions · 15 marks
- ES subject
- 55 questions · 85 marks
- Question types
- 29 MCQ · 15 MSQ · 21 NAT
- Duration
- 3 hours
In GATE, each MCQ carries 1 or 2 marks; a wrong MCQ answer costs one-third of its marks (−1/3 for a 1-mark and −2/3 for a 2-mark question). MSQ (multiple select) and NAT (numerical answer) questions have no negative marking.
All 65 questions
Each question is shown exactly as in the official paper. Tap “Show answer” to check yourself.
Q.1 · General Aptitude · 1 mark · MCQ
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Answer: D
Q.2 · General Aptitude · 1 mark · MCQ
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Answer: A
Q.3 · General Aptitude · 1 mark · MCQ
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Answer: B
Q.4 · General Aptitude · 1 mark · MCQ
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Answer: B
Q.5 · General Aptitude · 1 mark · MCQ
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Answer: B
Q.6 · General Aptitude · 2 marks · MCQ
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Answer: D
Q.7 · General Aptitude · 2 marks · MCQ
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Answer: A
Q.8 · General Aptitude · 2 marks · MCQ
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Answer: B
Q.9 · General Aptitude · 2 marks · MCQ
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Answer: A
Q.10 · General Aptitude · 2 marks · MCQ
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Answer: A
Q.11 · ES · 1 mark · MCQ
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Answer: B
Q.12 · ES · 1 mark · MCQ
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Answer: D
Q.13 · ES · 1 mark · MCQ
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Answer: C
Q.14 · ES · 1 mark · MCQ
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Answer: A
Q.15 · ES · 1 mark · MCQ
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Answer: C
Q.16 · ES · 1 mark · MCQ
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Answer: B
Q.17 · ES · 1 mark · MCQ
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Answer: A
Q.18 · ES · 1 mark · MCQ
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Answer: D
Q.19 · ES · 1 mark · MCQ
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Answer: C
Q.20 · ES · 1 mark · MCQ
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Answer: B
Q.21 · ES · 1 mark · MCQ
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Answer: C
Q.22 · ES · 1 mark · MCQ
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Answer: B
Q.23 · ES · 1 mark · MCQ
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Answer: B
Q.24 · ES · 1 mark · MSQ
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Answer: A, C
Q.25 · ES · 1 mark · MSQ
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Answer: A, B, C
Q.26 · ES · 1 mark · MSQ
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Answer: A, C, D
Q.27 · ES · 1 mark · MSQ
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Answer: A, C
Q.28 · ES · 1 mark · MSQ
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Answer: C, D
Q.29 · ES · 1 mark · MSQ
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Answer: A, B, C
Q.30 · ES · 1 mark · MSQ
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Answer: A, B, D
Q.31 · ES · 1 mark · MSQ
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Answer: A, B, D
Q.32 · ES · 1 mark · NAT
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Answer: -1
Q.33 · ES · 1 mark · NAT
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Answer: -0.4 to -0.3
Q.34 · ES · 1 mark · NAT
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Answer: 517625 to 517885
Q.35 · ES · 1 mark · NAT
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Answer: 16
Q.36 · ES · 2 marks · MCQ
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Answer: B
Q.37 · ES · 2 marks · MCQ
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Answer: D
Q.38 · ES · 2 marks · MCQ
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Answer: B
Q.39 · ES · 2 marks · MCQ
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Answer: A
Q.40 · ES · 2 marks · MCQ
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Answer: A
Q.41 · ES · 2 marks · MCQ
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Answer: D
Q.42 · ES · 2 marks · MSQ
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Answer: B, C
Q.43 · ES · 2 marks · MSQ
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Answer: A, B
Q.44 · ES · 2 marks · MSQ
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Answer: A, B, C
Q.45 · ES · 2 marks · MSQ
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Answer: A, C
Q.46 · ES · 2 marks · MSQ
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Answer: A, C
Q.47 · ES · 2 marks · MSQ
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Answer: A, B
Q.48 · ES · 2 marks · MSQ
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Answer: A, D
Q.49 · ES · 2 marks · NAT
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Answer: 3.7 to 3.9
Q.50 · ES · 2 marks · NAT
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Answer: 4.46
Q.51 · ES · 2 marks · NAT
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Answer: 0.033
Q.52 · ES · 2 marks · NAT
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Answer: 234 to 236
Q.53 · ES · 2 marks · NAT
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Answer: 63
Q.54 · ES · 2 marks · NAT
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Answer: 2.38 to 2.41
Q.55 · ES · 2 marks · NAT
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Answer: 20
Q.56 · ES · 2 marks · NAT
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Answer: 3.4 to 3.5
Q.57 · ES · 2 marks · NAT
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Answer: 132 to 133
Q.58 · ES · 2 marks · NAT
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Answer: 40 to 41
Q.59 · ES · 2 marks · NAT
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Answer: 2.5 to 2.6
Q.60 · ES · 2 marks · NAT
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Answer: 1.75 to 1.8
Q.61 · ES · 2 marks · NAT
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Answer: 142 to 143
Q.62 · ES · 2 marks · NAT
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Answer: 320 to 321
Q.63 · ES · 2 marks · NAT
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Answer: 0.02
Q.64 · ES · 2 marks · NAT
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Answer: 143280 to 144000
Q.65 · ES · 2 marks · NAT
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Answer: 155
GATE 2024 ES official answer key
From the official GATE answer key ↗. Numerical answers are accepted anywhere in the range shown.
| Q. | Section | Type | Marks | Answer |
|---|---|---|---|---|
| 1 | GA | MCQ | 1 | D |
| 2 | GA | MCQ | 1 | A |
| 3 | GA | MCQ | 1 | B |
| 4 | GA | MCQ | 1 | B |
| 5 | GA | MCQ | 1 | B |
| 6 | GA | MCQ | 2 | D |
| 7 | GA | MCQ | 2 | A |
| 8 | GA | MCQ | 2 | B |
| 9 | GA | MCQ | 2 | A |
| 10 | GA | MCQ | 2 | A |
| 11 | ES | MCQ | 1 | B |
| 12 | ES | MCQ | 1 | D |
| 13 | ES | MCQ | 1 | C |
| 14 | ES | MCQ | 1 | A |
| 15 | ES | MCQ | 1 | C |
| 16 | ES | MCQ | 1 | B |
| 17 | ES | MCQ | 1 | A |
| 18 | ES | MCQ | 1 | D |
| 19 | ES | MCQ | 1 | C |
| 20 | ES | MCQ | 1 | B |
| 21 | ES | MCQ | 1 | C |
| 22 | ES | MCQ | 1 | B |
| 23 | ES | MCQ | 1 | B |
| 24 | ES | MSQ | 1 | A, C |
| 25 | ES | MSQ | 1 | A, B, C |
| 26 | ES | MSQ | 1 | A, C, D |
| 27 | ES | MSQ | 1 | A, C |
| 28 | ES | MSQ | 1 | C, D |
| 29 | ES | MSQ | 1 | A, B, C |
| 30 | ES | MSQ | 1 | A, B, D |
| 31 | ES | MSQ | 1 | A, B, D |
| 32 | ES | NAT | 1 | -1 |
| 33 | ES | NAT | 1 | -0.4 to -0.3 |
| 34 | ES | NAT | 1 | 517625 to 517885 |
| 35 | ES | NAT | 1 | 16 |
| 36 | ES | MCQ | 2 | B |
| 37 | ES | MCQ | 2 | D |
| 38 | ES | MCQ | 2 | B |
| 39 | ES | MCQ | 2 | A |
| 40 | ES | MCQ | 2 | A |
| 41 | ES | MCQ | 2 | D |
| 42 | ES | MSQ | 2 | B, C |
| 43 | ES | MSQ | 2 | A, B |
| 44 | ES | MSQ | 2 | A, B, C |
| 45 | ES | MSQ | 2 | A, C |
| 46 | ES | MSQ | 2 | A, C |
| 47 | ES | MSQ | 2 | A, B |
| 48 | ES | MSQ | 2 | A, D |
| 49 | ES | NAT | 2 | 3.7 to 3.9 |
| 50 | ES | NAT | 2 | 4.46 |
| 51 | ES | NAT | 2 | 0.033 |
| 52 | ES | NAT | 2 | 234 to 236 |
| 53 | ES | NAT | 2 | 63 |
| 54 | ES | NAT | 2 | 2.38 to 2.41 |
| 55 | ES | NAT | 2 | 20 |
| 56 | ES | NAT | 2 | 3.4 to 3.5 |
| 57 | ES | NAT | 2 | 132 to 133 |
| 58 | ES | NAT | 2 | 40 to 41 |
| 59 | ES | NAT | 2 | 2.5 to 2.6 |
| 60 | ES | NAT | 2 | 1.75 to 1.8 |
| 61 | ES | NAT | 2 | 142 to 143 |
| 62 | ES | NAT | 2 | 320 to 321 |
| 63 | ES | NAT | 2 | 0.02 |
| 64 | ES | NAT | 2 | 143280 to 144000 |
| 65 | ES | NAT | 2 | 155 |
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