Civil Engineering
2025 · Paper 2
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Complete GATE CE 2025 Paper 2 overview, original pages and practice · Timed previous-paper practice
Questions 49–51 of 65. Imported answers require review unless explicitly marked reviewed.
Question 49
Open questionCEMSQ2 marksNeeds review
A compound has a general formula CₐHᵦO꜀Nᵈ and molecular weight 187. A 935 mg/l solution of the compound is prepared in distilled deionized water. The Total Organic Carbon (TOC) is measured as 360 mg/l (as C). The Chemical Oxygen Demand (COD) and the Total Kjeldahl Nitrogen (TKN) are determined as 600 mg/l (as O₂) and 140 mg/l (as N), respectively (as per the chemical equation given below). Which of the following options is/are CORRECT?
CₐHᵦO꜀Nᵈ + ((4a + b − 2c − 3d)/4) O₂ → aCO₂ + ((b − 3d)/2) H₂O + dNH₃
Atomic weight: C(12), H(1), O(16), N(14)
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Open questionCEMSQ2 marksNeeds review
The free flow speed of a highway is 100 km/h and its capacity is 4000 vehicle/h. Assume speed density relation is linear.
For a traffic volume of 2000 vehicle/h, choose all the possible speeds (in km/h) from the options given below (round off to two decimal places).
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Open questionCENAT2 marksNeeds review
Consider a discrete random variable
whose probabilities are given below. The standard deviation of the random variable is _____ (round off to one decimal place).
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