Organic Chemistry Questions

Match the following molecules with their right function Drag and drop options on the right hand side to reorder and match with items on the left Reordering may cause items on the right hand side to swap positions 1 2 3 4 1 stronger base weaker acid weaker base stronger acid III

Determine the predominant form of this molecule at a pH 7 A 1 B 2 C 3 C I

2 points How many moles are in 52 0 grams of methane CH4 3 24 moles 309 moles 16 0 moles 26 0 moles

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What is the most stable chair conformation of the 4 methoxy 1 2 dimethylcyclohexane structure given below A B C a b C D d OCH3 H C CH3

Dimensional Analysis 2 Molar Concepts Question 4 How many atoms are in 1 20 moles of copper Select one O O 6 02 x 1023 1 20 x 1023 5 02 x 1023 O 7 22 x 1023

hydrocarbon Which of the following explains why that is A B D E The carbon atoms of cyclopentadiene are all sp hybridized Cyclopentadiene is aromatic Removal of a proton from cyclopentadiene yields an aromatic anion Removal of a hydrogen atom from cyclopentadiene yields a highly stable free radical Removal of a hydride ion from cyclopentadiene produces an aromatic cation

projection shown A a B b C C D d E e Newman Br H Bu

What is the number of oxygen atom s on which the negative charge will resonate following relevant resonance structures A B C 0 1 2 D 3 4 F 5 HO H

When HI and NaOH reacts the products formed will be A HNa aq and IOH aq B H g and Nal aq C H O I and Nal aq D H O I and IOH aq

D Select one Dimensional Analysis 2 Molar Concepts Question 5 How many grams of H O are contained in 3 00 moles of H O O 54 06 grams O 18 01 grams O 6 00 grams O 0 167 grams D E c 1 B e F 219 Key C Section 116 12 5 aliha S d 28 3 11 ht m Ten 2 NO SA n P F S PRO Leld A4 7 FAH DOE P 6 P Br

following molecule A a B C D E b C d e D Br CH CH3 CH3 Br Br OH CH CH3 CH3 OH Br CH

Which structure represents the Newman projection shown A a B C b C D d E e

How many asymmetric carbons are present in the compound below N O H I OH

Select one a 1 a How many molecules are in 4 62 moles of nitric acid HNO De O 8 34x1024 molecules O6 02 x 1023 molecules 2 78 x 1024 molecules O 1 33x 1023 molecules

In the structure of the antibiotic Aztreonam shown below how many sp hybridized nitrogen atoms are there Type your response H N S N HO N O HZ O O

Are the following molecules chiral or achiral Match the molecules with the terms chiral and achiral PS answers need to be in numerical order e g chiral 1 before chiral 2 and achiral 1 before achiral 2 1 2 3 Drag and drop options on the right hand side to reorder and match with items on the left Reordering may cause items on the right hand side to swap positions CI Br K Br H 1 Br 2 Achiral 1 Chiral 2 Achiral 2 Chiral 1 CH Br H C CBr3 3 III III Br CH CH CH CH CH

How many chiral carbons does Betmathaosone have A 6 B 7 C 8 D 9 L

01 Dimensional Analysis 2 Molar Concepts Question 8 A piece of chalk CaCO has an initial mass of 43 5 grams The mass of the chalk decreased to 39 6 grams after a teacher used it Which of these is the closest value to the amount of chalk used Select one 1 3 90 moles 1 85 moles 0 0400 moles 0 400 moles 1 CEFNQUE isti S B C 6 Se

What is the absolute configuration R or S stereochemistry of the following molecule A B C D 2R 4R 2R 4S 2S 4R 2S 4S NH N

Select one 1 18 O O O O contain one molecule each contain the same number of molecules have a mass of 1 gram each have the same mass

Which wedge and dash drawing correctly represents the chair conformation given A B C D 1 2 3 4 H Chair conformations H Molecule CH H CH H C CI H H CH CH CH h CH H H CI H B H C CI H H

Choose the base s that can deprotonate the following acid and favour the formation of the products A 1 Select all that apply B 2 C 3 O OH 4 NH Base H NH H Bas

What is happening in the diagram below if red spheres are protons and blue spheres are neutrons Deuterium Tritium Nuclear Fission O Chemical Reaction O Radioactive Decay OPhase Change Energy Helium Neutron BYJU S co

Consider all relevant resonance structures for the molecule shown How many relevant resonance structures have a positive charge on different carbon atoms Type your response O N

Dimensional Analysis 2 Molar Concepts Question 1 Which has more atoms 1 moles of barium atoms or 2 moles of carbon atoms Select one O O 1 moles of barium Ba atoms They cannot be compared 2 moles of carbon C atoms They have the same number of atoms

13 27 Predict the products that are expected when each of the fol owing compounds is heated with concentrated HBr 0 0 F c b d

Select one alim 1 Dimensional Analysis 2 Molar Concepts Question 2 Which represents the greatest number of phosphorous atoms De 1 mole of phosphorous O1 gram of phosphorous O 1 molecule of phosphorous O1 atom of phosphorous

01 Dimensional Analysis 2 Molar Concepts Question 10 What is the molar mass of K CO3 Select one 1 O 99 g 138 g 106 g 67 g 1 2 310 Kay liimallimalia DE Beau 22 1211 110 19 zallerl

Explain how energy is involved with nuclear ission and fusion coses

Use a drawing to show how nuclear fission nuclear fusion and radioactive decay are different from each other Include an explanation with words with your drawing

1 12 pts Provide the structure s of the expected major organic product s Unless mentioned otherwise you can assume that all reagents are present in one mole Show stereochemistry where needed and write NR if there is no reaction non hindered Base NaOC H5 C H5OH aifsev a O H Br b HC C CH3 heat nun hind 1 CH Li THF 2 3 HO C Hs

A HO HO COOH COOH OH OH A A 0s04 B HIO4 B HO OH C LIAIH4 excess OH OH D

Which of the following uses nuclear radiation Coal Powerplants Natural Gas CH4 powerplants Some Cancer Treatments The Haber Process The human digestive system

Which one is most stable compounds a I O O C III b ll

What changes to the variables below would result in more hydrogen gas H being generated with the reaction H g 12 g Hydrogen lodine AH 9kJ mol Temperature Select Pressure Select 2 HI g Hydrogen iodide Amount of H in reaction vessel Select Amount of HI in the reaction vessel Select Select Increase It does not matter San for

reaction is N N H A B O NH N HIN JEE Main 2019 12 Jan Shift 2 H N H CH I base N H Chemistry Amines NH N N CH3 NH NCH S NHCH N MARK S N

What process is happening in the diagram below if red spheres are neutrons and blue spheres are protons incident neutron Chemical Reaction Nuclear Fusion release of energy ONuclear Fission O Radioactive Decay O Phase Change incident neutron ALEEREEEE

0000000000 the reaction below is at equilibrium what are hree changes a scientist could make to produce s much SO3 as possible Explain how each change will result in more SO3 SO2 g O2 g 2SO3 g AH 197 8kJ mol

Radioactive decay occurs because An atom is too old An atom is stable An atom s nucleus is unstable An atom has too many electrons The atom is too young 0 1 pts

Which of the following does not involve nuclear chemistry Atomic Bombs The sun A combustion reaction Fusion Fission

Calculate the equilibrium constant for the chemical reaction given the equilibrium concentrations of the reactants and products in the table 2 AB aq 4 CD aq 2 AD aq 2 BD aq 4 C aq Substance AB CD AD BD C Equilibrium concentration 1 73 M 2 33 M 2 73 M 3 13 M 1 21 M

Write the equilibrium constant Kp expression for the reaction A g 4B 1 3 C g D g K Answer Bank

Which set of reagents would be suitable for the completion of the following flow chart OH xx A PCC B H CRO4 THF 2 NaOH H O2 OH C 1 Hg OAC 2 H O 2 NaBH4 OI H II C III G IV J V B OI E II D III A IV J V A IV E H3PO4 heat F KOtbu G 1 LiAlH4 2 H3O H 1 NaBH4 2 H3O J 1 Ph MgBr ether 2 H3O I F II D III B IV J V A OH I F II D III A IV J V B D 1 BH3

Pick one element from the first column and one element from the second column Explain whether or not they are likely to react Provide reasons why they would or would not react Be sure to include the word electron in your answer Column 1 Lithium Phosphorus Bromine Argon Sodium Column 2 Sulfur Carbon Neon Nitrogen Calcium

Which of the following reaction will not result the following product OH ATM Ph Me Et o 1 PhBr Mg Ether 2 H 0 1 EtMgBr Ether 2 H O 1 Hg OAc 2 H O 2 NaBH4 1 NaBH 2 H 0

Match the description to nuclear fusion fission or both Two nuclei combining Nuclei Separating Used in Atomic Bombs Occurs in the Sun Used in Nuclear Reactors of Powerplants Releases large amounts of energy Involves Protons and Neutrons Choose Choose Fusion Fission Both Choose Choose Choose Choose V Same options for all

When a large unstable nuclei split apart what happens Larger Nuclei are formed O Different Elements are Formd A chemical reaction occurs Nuclear Fusion Occurs None of these

Use the reaction below to answer the question PCI5 g PC 3 g Cl g AH 67kJ mol If the reaction is at equilibrium and a scientist decreases the pressure of the reaction container what will happen O The amount of PCI3 will decrease O The amount of Cl2 will decrease O The reaction will shift to the right O The reaction will shift to the left O The amount of PCI5 will Increase

Use the reaction below to answer the question PC15 9 PC13 g Cl g AH 67kJ mol If the reaction is at equilibrium and a scientist adds more Cl to the reaction what will happen O More PCI5 will be produced O The reaction will shift left O There will be less PC 3 O All of these answers are correct The amount of reactants will increase and the amount of products will decrease