⚗️ Chemical Engineering Solved MCQs with Answers

Practice 1920 approved ⚗️ Chemical Engineering questions with verified answers from the 🛠️ Engineering Essentials subject for Pakistan exams.

1920 solved MCQs

Markovnikov’s rule: HBr + propene produces?Answer: 2-bromopropane Critical temperature means the temperature above which? Gas cannot be liquefied by pressure alone, Gas freezes immediately, Gas becomes plasma, None of theseAnswer: Gas cannot be liquefied by pressure alone Which is a strong ligand among all? Cl⁻, H₂O, CN⁻, None of theseAnswer: CN⁻ What is correct about [Ni(CN)₄]²⁻? Square planar and paramagnetic, Tetrahedral and paramagnetic, Square planar and diamagnetic, None of theseAnswer: Square planar and paramagnetic Which has maximum number of unpaired electrons? Mn₂⁺, Fe₂⁺, Co₂⁺, None of theseAnswer: Mn₂⁺ Which has the bond angle near to 120°? CH₄, NH₃, BF₃, None of theseAnswer: BF₃ Which has highest ionic character? KBr, LiF, NaCl, None of theseAnswer: LiF Ethyl acetate formed by reaction of ethanol and ethanoic acid is an example of?Answer: Esterification Which orbital faces highest effective nuclear charge? 3s, 3p, 3d, None of theseAnswer: 3s What is the oxidation state of Fe in [Fe(CN)₆]₄−?Answer: +2 In the manufacturing of Nylon 6,6, which two chemicals are used?Answer: Adipic acid and Hexamethylenediamine Which electrophile is used in aromatic nitration? NO⁺, NO₂⁻ , NO₂⁺, None of theseAnswer: NO₂⁺ If doubling [A] (keeping B constant) makes the rate 4 times, and doubling [B] doubles the rate, what is the overall order of reaction?Answer: Third order [Pt(NH₃)₂Cl₂] shows how many geometrical isomers?Answer: 2 The common crystal type of carbon is ……………..Answer: Cubic How many zones through which the charge passes in rotary kiln?Answer: 4 Which of the following reaction of HNO₃ is true?Answer: 3Cu + 8HNO₃ → 3Cu(NO₃)₂ + 2NO + 4H₂O Acetylene under pressure over an organo-nickel catalyst at 70 degree C converts into:Answer: Benzene The mode of hybridization in alkane is _________ and three hybrids orbital is formed.Answer: Sp₃ Which of the following agent oxidized the aldehydes to carboxylic acid?Answer: Tollen’s reagent The IUPAC name of formic acid is _______ acid.Answer: Methanoic acid The part of fourdrinier table apparatus which discharges a uniform jet of pulp suspension is:Answer: Head box Sodium reacts with alkyl halides in ether to form alkanes, the reaction is known as:Answer: Wurtz synthesis When the solute has gone in the ether layer then it is separated by _______the etherAnswer: Evaporating Which of the following forms ideal solution?Answer: Ethyl iodide and promo-benzene Which of the following gas has maximum value of e/wAnswer: H₂ The phenomena in which the substance exists in more than one crystalline fo0rm is called:Answer: Polymorphism If two sets have no common elements then they are called:Answer: Disjoint sets To ensure that ethanol is not used for drinking purposes, it is converted to methylated spirit by addingAnswer: 10 % methanol and a little acetone Nanocomposite materials are useful in food industry as they prevent packaged food from damage due to:Answer: All of these