Dental Questions 2023 Exam Paper PDF

1- Type of hyperdization carbon in CH4 is: 1- SP 2-SP2 3- SP3 2- Type of hyperdization carbon in CH2=CH2 is: 1- SP 2-SP2 3- SP3 3- Type of hyperdization carbon in C2H2 is: 1- SP 2-SP2 3- SP3 4- The structure of carbon cation is: : 1- CH2...

1- Type of hyperdization carbon in CH4 is: 1- SP 2-SP2 3- SP3 2- Type of hyperdization carbon in CH2=CH2 is: 1- SP 2-SP2 3- SP3 3- Type of hyperdization carbon in C2H2 is: 1- SP 2-SP2 3- SP3 4- The structure of carbon cation is: : 1- CH2 + 2- CH3 - 3- CH3 5- The structure of carbon anion is: : 1- CH2 + 2- CH3 - 3- CH3 6- The structure of cabene is: : 1- CH2 + 2- CH3 - 3- CH3 7- The structure of radical is: : 1- CH2. 2- CH3 3-.CH. 2 8- The reaction between Br2/H2O and CH2=CH2 is considered as: 1- Rearrangement reaction 2- Substitution reaction 3- Addition reaction 4- Elimination reaction 9- The reaction between Br2/H2O and CH2=CH2 is considered as: 1  1- Rearrangement reaction 2- Substitution reaction 3- Addition reaction 4- Elimination reaction 10- The reaction betweenCH3Cl and NaOH is considered as: 1- Rearrangement reaction 2- Substitution reaction 3- Addition reaction 4- Elimination reaction 11- The reaction between PhNHOH and HCl is considered as: 1- Rearrangement reaction 2- Substitution reaction 3- Addition reaction 4- Elimination reaction 12- The reaction between CH3CH2OH and KMnO4 is considered as: 1- Rearrangement reaction 2- Oxidation reaction 3- Addition reaction 4- Elimination reaction 13- The compound with molecular formula C4H10 has 1- Position isomerism 2- Chain isomerism 3- Functional group isomerism 4- Metamerisme 14- The compound with molecular formula C3H6O has 1- Position isomerism 2- Chain isomerism 3- Functional group isomerism 4- Metamerisme 15- The compound with molecular formula C2H6O has 1- Position isomerism 2- Chain isomerism 3- Functional group isomerism 4- Metamerisme 16- The compound with molecular formula C4H10O has 1- Position isomerism 2- Chain isomerism 3- Functional group isomerism 4- Metamerisme 17- The type of isomerism in CH3-CH=CH-CH3 1- Optical isomerism 2  2- Chain isomerism 3- Geometrical isomerism 18- The type of isomerism in CH3-CHOHCOOH 1- Optical isomerism 2- Chain isomerism 3- Geometrical isomerism 18- The type of isomerism in CH3CHNH2COOH 1- Optical isomerism 2- Chain isomerism 3- Geometrical isomerism 19- The D form of lactic acid is: 1- 2- 20- The L form of lactic acid is: 1- 2- 21- Addition of singlet carbine to cis 2-butene gave 1- 2- 3- both 1 and 2 22- Addition of singlet carbine to trans 2-butene gave 1- 2- 3- both 1 and 2 23- Addition of triplet carbine to cis 2-butene gave 3  1- 2- 3- both 1 and 2 24- addition of triplet carbine to trans 2-butene gave 1- 2- 3- both 1 and 2 25- Methane reacts with excess of Cl2 in presence of sun light to gave 1- CH3Cl 2-CH2Cl2 3-CHCl3 4-CCl4 26- The structure of ethylene is: 1- CH3CH3 2-CH2=CH2 3-CH3CH2CH3 27- 2- methyl-propane(CH3CH(CH3)CH3) reacts with Cl2 at 250- 400C to give 1- CH3CH(CH3)CH2Cl 2-CH3C(CH3)ClCH3 3- Both 1 and 2. 28- The structure of 2-butene (cis or trans) is 1- CH3CH2CH2CH3 2-CH3CH=CHCH3 3- CH3CH2CH=CH2 29- Propene has the following structure: 1- CH3CH2CH3 2-CH3CH=CH2 3- CH3CH2CH2Cl 30- The structure of 4-methyl-2-pentene(cis or trans) is: 1- CH3(CH2)4CH3 2-CH3CH(CH3)CH=CHCH3 3- CH3CH=CHCH2CH=CH2 31- Ethyl chloride (CH3CH2Cl) reacts with alcoholic KOH to give: 1- CH3CH2OH 4  2-CH2=CH2 3- CH2OHCH2OH 32- Dehydration of ethyl alcohol gives: 1- C2H2 2-CH2=CH2 3- CH2OHCH2OH 33- Ethylene reacts with Br2/H2O to give 1- CH3CH2Br 2-CH2BrCH2Br 3- CH2OHCH2OH 34- Ethylene reacts with HCl to give 1- CH3CH2Cl 2-CH2ClCH2Cl 3- CH2ClCH2OH 35- Ethylene reacts with H+/H2O to give 1- CH3CH2OH 2-CH3COOH 3- CH2OHCOOH 35- Ethylene reacts with acidic KMnO4 to give 1- CH3CH2OH 2-CH3CH3 3- CH2OHCH2OH 36- Propene reacts with HCl to give 1- CH3CH2CH2Cl 2-CH3CH2ClCH2Cl 3- CH3CHClCH3 37- Propene reacts with HCl in presence of H2O2 to give 1- CH3CH2CH2Cl 2-CH3CH2ClCH2Cl 3- CH3CHClCH3 38- Ozonolysis of ethylene give 1- Formaldehyde only 2- Acetaldehyde only 3- Formaldehyde and Acetaldehyde 39- Ozonolysis of Propene give 1- Formaldehyde only 2- Acetaldehyde only 3- Formaldehyde and Acetaldehyde 40- Ozonolysis of 2-methyl-propene give 1- Formaldehyde only 5  2- Acetaldehyde only 3- Formaldehyde and Acetone 41- Ozonolysis of trans-2-butene give 1- Formaldehyde only 2- Acetaldehyde only 3- Formaldehyde and Acetaldehyde 42- Ozonolysis of 2,3-dimetthyl-putene give 1- Formaldehyde only 2- Acetaldehyde only 3- Acetone only 43- Ethylene reacts with HCN to give 1- CH2CNCH2CN 2- CH3CH2CN 3-CH3CH3 44- Propene reacts with H2SO4 to give 1- CH3CHOHCH3 2-CH3CH2CH2OH 3-CH3CH(OSO3H)CH3 45- Methylpropene CH3C(CH3)=CH2 reacts with HCl to give: 1- tert. Butyl chloride (CH3)3CCl 2- 2-Chloro-2-methyl propane CH3C(CH3)ClCH3 3- Both 1 and 2 46- 1-Bromo-propene reacts with NaNH2 to give 1- propyne CH3CCH 2- Propene CH3CH=CH2 3- Propane CH3CH2CH3 + 47- Propyne reacts with H2O/H to give: 1- Formaldehyde 2- Acetaldehyde 3- Acetone + 48- Acetylene reacts with H2O/H to give: 1- Formaldehyde 2- Acetaldehyde 3- Acetone 51- Acetylene reacts with sodium metal to give: 1- CH2=CH2 2- CH3COONa 3- HCCNa 52- Addition of water to Ca2C give: 1- Ethane 6  2- Ethylene 3- Acetylene 53- Methly Chloride CH3Cl reacts HCCNa to give: 1- CH3CCH 2- CH3CH=CH2 3- CH3CH2CH3 54- CH3Cl react with aqueous NaOH undergo 1- SN1 type 2- SN2 type 3- SNi type 55- (CH3)CCl react with aqueous NaOH undergo 1- SN1 type 2- SN2 type 3- SNi type 56- CH3CH2CH2Cl reacts with alcoholic KOH to give 1- CH3CH2CH2OH 2- CH3CHOHCH3 3- CH3CH=CH2 57- CH3CH2CH2ClCH3 reacts with alcoholic KOH to give 1- CH3CH2CH2OHCH3 2- CH3CH2CH=CH2 3- CH3CH=CHCH3 58- Ethyl chloride reacts with H2O/H+ to give 1- C2H5OH 2- CH3OCH3 3- CH2ClCH2OH 59- Ethyl chloride reacts with H2SO4 to give 1- C2H5OSO3H 2- CH3OCH3 3- CH3CHO 60- Ethyl chloride reacts with NH3 to give 1- C2H5NH2 2- CH2NH2COOH 3- CH3CONH2 61- Ethyl chloride reacts with Zn metal to give 1- CH3CH2CH2CH3 2- CH3CH=CHCH3 3- CH2=CHCH2CH3 62- Ethyl chloride reacts with HCN to give 7  1- CH3CH2CN 2- CH2ClCH2CN 3- CH3COOH 63- Methyl chloride reacts with Mg to give 1- CH3OH 2- CH3MgCl 3- CH3COOH 64- Ethyl alcohol is a type of; 1- Primary alcohol 2- Secondary alcohol 3- tert. Alcohol 65- Ethyl alcohol is a type of; 1- Monohydric alcohol 2-Dihydric alcohol 3- Polyhydric alcohol 66- Methyl alcohol is a type of; 1- Primary alcohol 2- Secondary alcohol 3- tert. Alcohol 67- Isopropyl alcohol is a type of 1- Primary alcohol 2- Secondary alcohol 3- tert. Alcohol 68- tert Butyl alcohol is a type of: 1- Primary alcohol 2- Secondary alcohol 3- tert. Alcohol 69- Structural formula of Isopropyl alcohol is: 1- CH3CH2CH2OH 2- CH3CHOHCH3 3- (CH3)2CHCH2OH 70- Structural formula of isobutyl alcohol is: 1- CH3CH2CH2OH 2- CH3CHOHCH3 3- (CH3)2CHCH2OH 71- Structural formula of tert pentyl alcohol is: 1- CH3CH2CH2CH2CH2OH 2- CH3CHOHCH2CH2CH3 3- (CH3)2COHCH2CH3 8 72- Ethylene glycol (HOCH2CH2OH) is a type of: 1- Monohydric alcohol 2-Dihydric alcohol 3- Polyhydric alcohol 73- Glycerin is a type of: 1- Monohydric alcohol 2-Dihydric alcohol 3- Polyhydric alcohol 74- Alcohol have higher boiling point than the corresponding alkane due to 1- Ionic bond 2- Covalent bond 3- Hydrogen bond 75- Structural formula of Glycerin is : 1- CH2OHCHOHCH2OH 2- HOCH2CH2CH2OH 3- CH3CHOHCH2OH 76- We can differentiate between different types of monohydric alcohol by: 1- Esterfication test 2- Acidity test 3- Oxidation test 77- Reduction of formaldehyde gives: 1- Methanol 2- Formic acid 3- Methane 78- Reduction of acetaldehyde gives: 1- Ethane 2- Ethyl alcohol 3- Acetic acid 79- Reduction of acetone gives: 1-Propyl alcohol 2- Isopropyl alcohol 3- Propane 80- Ethyl alcohol reacts with I2/NaOH to give: 1- Iodoform test 2- Acidity test 3- Esterfication test 81- Ethyl alcohol reacts with POCl3 to give 1- CH3CH2Cl 9  2-CH2ClCH2Cl 3-CH3CHCl2 82- Ethyl alcohol reacts with PCl3 to give 1- CH3CH2Cl 2-CH2ClCH2Cl 3-CH3ClCHCl2 83- Ethyl alcohol reacts with PCl5 to give 1- CH3CH2Cl 2-CH2CH2Cl 3-CH3CHCl2 84- Ethyl alcohol reacts with I2/NaOH to give: 1- CHI3 2- CH3CHO 3- CH3COOH 85- Oxidation of ethyl alcohol with KMnO4 in acidic medium gives 1- Ethane 2- Acetaldehyde 3- Acetic acid 86- Oxidation of isopropyl alcohol gives 1- CH3COCH3 2- CH3CH2CHO 3- CHOCH2CHO 87- Ethyl alcohol reacts with Na metal to give: 1- CH3CH2ONa 2- CH3CHO 3- CH3COONa 88- Methyl magnesium chloride reacts with formaldehyde to give 1- CH3CH2OH 2- HOCH2CH2OH 3- CH3CHOHCH3 89- Methyl magnesium chloride reacts with acetaldehyde to give 1- (CH3)2CHOH 2- CH3CH2CH2OH 3- CH3CH2CH3 90- Methyl magnesium chloride reacts with acetone to give 1-CH3CH2CH2CH2OH 2-(CH3)2CHCH2OH 3- (CH3)3COH 10 91- Ethyl alcohol reacts with acetic acid in presence of H 2SO4 to give: 1- CH3COOC2H5 2- (CH3CO)2O 3- CH3CH2OSO3H 92- Methyl alcohol reacts with acetic acid in presence of H 2SO4 to give: 1- CH3COOCH3 2- (CH3CO)2O 3- CH3CH2OSO3H 93- Hydrolysis of HOOCCPhCH3Cl with aq. NaOH undergo 1- SN1 2- SN2 3- SNi 94- Structure formula of diethyl ether is 1- CH3OCH3 2- CH3OCH2CH3 3- CH3CH2OCH2CH3 95- Structure formula of ethyl methyl ether is 1- CH3OCH3 2- CH3OCH2CH3 3- CH3CH2OCH2CH3 95- Structure formula of dimethyl ether is 1- CH3OCH3 2- CH3OCH2CH3 3- CH3CH2OCH2CH3 96- Ethyl chloride reacts with sodium ethoxied to give 1- CH3OCH3 2- CH3OCH2CH3 3- CH3CH2OCH2CH3 97- Mild oxidation of ethyl alcohol gives: 1- Acetaldehyde 2- Formaldehyde 3- Both 1 and 2 98- Strong oxidation of ethyl alcohol gives: 1- Acetaldehyde 2- Acetic acid 3- Both 1 and 2 99- Mild oxidation of methyl alcohol gives: 1- Acetaldehyde 11  2- Formaldehyde 3- Both 1 and 2 100- Strong oxidation of methyl alcohol gives: 1- Acetaldehyde 2- Formic acid 3- Both 1 and 2 101- Mild oxidation of benzyl alcohol gives: 1- Benzaldehyde 2- Benzoic acid 3- Both 1 and 2 102- Strong oxidation of benzyl alcohol gives: 1- Benzaldehyde 2- Benzoic acid 3- Both 1 and 2 103- Oxidation of Primary alcohol gives: 1- Aldehydes 2- Ketone 3- Acid 104- Oxidation of Secondry alcohol gives: 1- Aldehydes 2- Ketone 3- Acid 105- Oxidation of tert alcohol gives: 1- Aldehydes 2- Ketone 3- non of them 106- Acetone is formed on oxidation of : 1- Propanol 2- Isopropanol 3- Propan 107- Benzene reacts with acetyl chloride in presence of anhydrous AlCl3 to give: 1- PhCOCH3 2- PhCOPh 3-CH3COCH3 108- Ozonolysis of Acetylene gives: 1- HCOCOH 2- HCOOH 3-Both 1 and 2 12 109- Ozonolysis of CH3CH=CHCH3 1- CH3CHO 2- CH3CHOHCHOHCH3 3-CH3CH2CH2CH3 110- Benzaldehyde reacts with aniline to give 1- PhCONHPh 2- PhCH=NPh 3- PhCH=NOPh 111- Benzaldehyde reacts with hydroxyl amine to give 1- PhCONHPh 2- PhCH=NPh 3- PhCH=NOH 112- Benzaldehyde reacts with hydrogen cyanide to give: 1- PhCOOH 2-PhCH2COOH 3- PhCHOHCN 113- Acetaldehyde reacts with hydrogen cyanide to give: 1- CH3CH2CN 2- CH3CHOHCN 3- CH3CHOHCOOH 114- Formaldehyde reacts with hydrogen cyanide to give: 1- HOCH2CN 2- CH3OH 3- CH3CN 115- Acetone reacts with hydrogen cyanide to give: 1- HOCH2COCH2CN 2- (CH3)2COHCN 3- CNCH2COCH2CN 116- Formaldehyde reacts with methyl alcohol 1:1 to give: 1- HOCH2OCH3 2- CH2(OCH3)2 3- CH3COOCH3 117- Acetaldehyde reacts with methyl alcohol 1:1 to give: 1- Hemeacetal 2- Acetal 3- Hemiketal 4- Ketal 118- Acetaldehyde reacts with methyl alcohol 1:1 to give: 1- CH3CHOHOCH3 2- CH3CH(OCH3)2 13  3- (CH3)2COHOCH3 4- (CH3)2C(OCH3)2 119- Benzaldehyde reacts with methyl alcohol 1:1 to give: 1- PhCHOHOCH3 2- PhCH(OCH3)2 3- Ph2COHOCH3 4- Ph2C(OCH3)2 120- Acetophenone reacts with methyl alcohol 1:1 to give: 1- PhCH3COHOCH3 2- PhCH3C(OCH3)2 3- Ph2COHOCH3 4- Ph2C(OCH3)2 121- Acetophenone reacts with methyl alcohol 1:1 to give: 1- PhCH3COHOCH3 2- PhCH3C(OCH3)2 3- Ph2COHOCH3 4- Ph2C(OCH3)2 122- Formaldehyde reacts with methyl alcohol 1:2 to give: 1- HOCH2OCH3 2- CH2(OCH3)2 3- CH3COOCH3 123- Acetaldehyde reacts with methyl alcohol 1:2 to give: 1- Hemeacetal 2- Acetal 3- Hemeketal 4- Ketal 124- Acetaldehyde reacts with methyl alcohol 1:2 to give: 1- CH3CHOHOCH3 2- CH3CH(OCH3)2 3- (CH3)2COHOCH3 4- (CH3)2C(OCH3)2 125- Benzaldehyde reacts with methyl alcohol 1:2 to give: 1- PhCHOHOCH3 2- PhCH(OCH3)2 3- Ph2COHOCH3 4- Ph2C(OCH3)2 126- Acetophenone reacts with methyl alcohol 1:2 to give: 1- PhCH3COHOCH3 2- PhCH3C(OCH3)2 3- Ph2COHOCH3 4- Ph2C(OCH3)2 14 127- Acetophenone reacts with methyl alcohol 1:2 to give: 1- PhCH3COHOCH3 2- PhCH3C(OCH3)2 3- Ph2COHOCH3 4- Ph2C(OCH3)2 128- Structural formula of Acetophenone is: 1- PhCOCH3 2- PhCOHCH3 3- PhCH2CH3 129- Structural formula of Benzophenone is: 1-PhCOPh 2- PhCOHPh 3- PhCOPh 130- Benzene reacts with CH3Cl in presence of AlCl3 to give:- 1- PhCH3 2- PhCH2Cl 3- PhCHO 131- Benzene reacts with CH3COCl in presence of AlCl3 to give:- 1- PhCOOCH3 2- PhCOCl 3- PhCOCH3 132- Benzaldehyde reacts with Phenyl hydroxylamine to give 1- PhCONHPh 2- PhCH=NPh 3- PhCH=NOPh 133- Aldol condensation gives with a-CH3CHO b-HCOOH c-HCHO 134 - Cannizzarro reaction gives with a-CH3COCH3 b-PhCOCH3 c- HCHO 135- Cannizzarro reaction gives with a-CH3COCH3 b- PhCHO c- PhCOCH3 136- Cannizzarro reaction gives with a-Furfural b-PhCOCH3 15  c- CH3CHO 137- Aldol condensation gives with a-CH3COCH3 b-PhCOOH c-HCHO 138- Aldol condensation gives with a-CH2=CHCH3 b-HCOOH c-PhCOCH3 139- Iodoform test give with 1- Acetaldehyde 2- Ethyl Alcohol 3- Both 1 and 2 140- Iodoform test give with 1- Acetone 2- Acetophenone 3- Both 1 and 2 141- Iodoform test give with 1- Benzaldehyde 2- Formaldehyde 3- Acetone 16