Sindh MDCAT 2020 Paper 81- Alkyl halides involving –C –X bond breakage and –C –Nu bond formation ? A. SN1B. SN2C. E1D. E2 View Answer Answer : B. SN2 Description 83- R-X reaction with alcohols forms: A. R-OHB. RORC. R-X-OHD. RH View Answer Answer : B. ROR Description 84- IUPAC name of C6H5O(CH3)2 is: A. 2-methyl-3-hexanoneB. 2,6-Dimethyl cyclohexanoneC. 3-methyl cyclohexanoneD. 4-methyl-3-hexanon View Answer Answer : B. 2,6-Dimethyl cyclohexanone Description 85- Phenol is known as: A. Carpolic acid B. Carbonylic Acid C. Carbolic AcidD. Carboxylic Acid View Answer Answer : C. Carbolic Acid Description 86- Phenol is more acidic than alcohols because of the following reasons: A. Delocalization of negative charge in the ringB. Delocalization of negative charge in the OH group C. Delocalization of positive charge on the carbon atom in ring D. Delocalization of positive charge in the OH group View Answer Answer : A. Delocalization of negative charge in the ring Description 88- Which of the following reagent is used to separate purify carbonyl and non-Carbony compounds? A. HCNB. BrMgCH3C. NaHSO3D. H2O View Answer Answer : C. NaHSO3 Description 90- Which of the following is the strongest acid? A. Propionic acid B. Fluoroethanoic acid C. Nitro Ethanoic acidD. Trichloroethanoic acid View Answer Answer : D. Trichloroethanoic acid Description 91- Hydrolysis of acyl chloride results in the formation of: A. Acid anhydride B. Carboxylic acidC. AmidesD. Esters View Answer Answer : B. Carboxylic acid Description 92- The exact reactivity order for carboxylic acid derivatives is: A. Amide >acylchloride> esterB. Acychloride> anhydride > EsterC. Anhydride >acylchloride> esterD. Ester > anhydride >acylchloride View Answer Answer : B. Acychloride> anhydride > Ester Description 93- Based on the physio-chemical properties, proteins may be classified into the following types: A. Simple proteins B. Compound proteins C. Derived proteins D. All of the above View Answer Answer : D. All of the above Description 94- Based on function, thyroxin can be classified as: A. Hormonal proteinB. Structural proteinC. Transport protein D. Genetic protein View Answer Answer : A. Hormonal protein Description 95- L-Asparaginase enzyme has been used for the treatment of: A. JaundiceB. Blood cancerC. RicketsD. Heart disease View Answer Answer : B. Blood cancer Description 96- Potassium, Rubidium, Cesium react with oxygen to form which types of oxides? A. PeroxideB. SuperoxideC. Suboxide D. Normal Oxide View Answer Answer : B. Superoxide Description 97- Magnesium reacts with Nitrogen to form: A. Mg2N2B. Mg3N2C. MgN2D. MgN View Answer Answer : B. Mg3N2 Description 98- Densities of alkali metals are low due to: A. Weak intermolecular forcesB. Large atomic volume C. Smaller sizeD. ns1 configuration View Answer Answer : B. Large atomic volume Description 99- In 3rd series of transition elements paramagnetic behaviour is maximum for Mn+2 and: A. Ti^3+B. V^3+C. Zn^+2D. Cr^3+ View Answer Answer : D. Cr^3+ Description 100- Electronic configuration of chromium (Proton number 24) is: A. [Ar} 3d^5 4S^2B. [Ar] 3d^5 4S^1C. [Ar] 3d^4 4S^2D. [Ar] 3d^6 4S^2 View Answer Answer : B. [Ar] 3d^5 4S^1 Description 1 2 3 4 5 6 7 8 9 10
