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Q19.A tank is converted to treat organic waste water from a kitchen as shown in the figure below. Bio gas gets accumulated on the top part of the tank. Which of the following options is a suitable location for drilling an air hole to maintain the water level inside the tank?

Q21.Parts of the letters have been hidden by vertical strips in the given options. Which option contains a meaningful word with correct spelling?

CEED2024Q20·mcq·Medium

Which option will replace the question mark? (A sequence of rotating hexagonal gem/crystal shapes is shown)