Complete GATE ES 2026 Paper 1 overview, original pages and practice · Timed previous-paper practice

Questions 28–30 of 65. Imported answers require review unless explicitly marked reviewed.

Paper practice 65 questionsPage 10 of 22

Question 28

Open question
ESMSQ1 markNeeds review
Which of the following chemical reactions is/are related to smog formation in the troposphere?
Your answerSelect all correct options. You can choose more than one.

Log in to check the answer

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Question 29

Open question
ESMSQ1 markNeeds review
Which of the following processes is/are primarily used to remove the organic matter in sludge?
Your answerSelect all correct options. You can choose more than one.

Log in to check the answer

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Question 30

Open question
ESMSQ1 markNeeds review
Which of the following options is/are CORRECTLY listing the species included in Total Kjeldahl Nitrogen (TKN) estimation of an aqueous sample?
Your answerSelect all correct options. You can choose more than one.

Log in to check the answer

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer