Hexadentate chelating ligand — Binds via 4 O and 2 N. Used in water softening, titrations of Ca²⁺, Mg²⁺.

State Police — State police force.

Since 2004 — Infopark Kochi from 2004.

DCOA Mixed Practice Test #174

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Q1.Newton's first law defines:

A. Force B. Inertia C. Acceleration D. Impulse

Q2.Kerala Rural Development Programme funds:

A. DCP B. MGNREGA + state C. All D. Unknown

Q3.10% law (Lindeman) states:‌‍

A. Zero loss B. All energy passes C. 90% transferred D. ~10% of energy transferred to next trophic level

Q4.EDTA is a:‌‍

A. Hexadentate chelating ligand B. No binding C. Bidentate D. Monodentate

Q5.Kerala Police:‌‍

A. Central B. State Police C. Union D. Private

Q6.Whose autobiography is known as 'Ente Jeevitha Smaranakal'?‌‍

A. Vaikom Muhammad Basheer B. E.M.S. Namboodiripad C. K. Kelappan D. Mannathu Padmanabhan

Q7.First Chief Justice of Kerala HC:‌‍

A. P.T. Raman Nair B. K.T. Koshi C. V.R. Krishna Iyer D. M.S. Menon

Q8.Human evolution — first hominid with larger brain:‌‍

A. Homo habilis ('handy man') B. Australopithecus C. Neanderthal D. Homo erectus

Q9.Anaerobic respiration in yeast produces:‌‍

A. Water B. Acetic acid C. Lactic acid D. Ethanol + CO₂

Q10.Infopark Kochi:‌‍

A. 2020 B. Since 2004 C. 1990 D. 2010

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