Which of the following is true in the addition polymerization of thermosets?
a. |
You cannot make thermosets by addition polymerization |
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b. |
Polymerization only occurs in a diluent solution |
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c. |
One carbon to carbon double bond is required |
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d. |
Two carbon to carbon double bonds are required |
thermosets are those polymers which can not be not be remoulded these are also called thermosetting plastic.these can be formed by codensation polymerization and get cross linked structure to strengthen more. polymerization is not very much dependent to the concentration of the solution and for the polymerisation process the one cc bond is required .hence the correct option is one c=c is required.
Which of the following is true in the addition polymerization of thermosets? a. You cannot make...
Which of the following structures are reasonable monomers for addition polymerization? 13. Which of the following structures are reasonable monomers for addition polymerization? CH2OH CI H O OH он H2N Ol H C 2 он (iv) IV (a) i only (b) ii and iv (c) ii, iii, and iv (d) i and iii (e) iii only
Draw the monomer used to make the following polymer via addition polymerization. Draw the molecule by placing atoms on the grid and connecting them with bonds.
Q6. Fill in the blanks in the following senetecnes with appropriate words/terms I. Addition polymerization occurs between molecules containing -------------bonds II. The polymer formed from two or more different kinds of monomeric units is known as ------- III. The polymers formed by the radical polymerization are mostly ------------polymer IIII. The molecules of cyclohexane mostly exist in the --- -------conformation. V. The optical activity of a compound is measured by زر
Which type of polymerization involves the loss of a small molecule during the polymerization reactions? a) subtraction polymerization b) sequential polymerization c) addition polymerization d) condensation polymerization What is one of the most common ways that the properties of a polymer can be altered?
Which of the following statements about oxalic acid is true? a.) It is very soluble in water even in cold temperatures due to its low mass and ability to hydrogen-bond. b.) It reacts with water to form carbon dioxide and water. c.) It is only soluble in cold water but will precipitate out in hot water. d.) It has a lower melting point than most carboxylic acids so it melts when the solution is heated and thus cannot recrystallize. Thank...
Which of the following statements about polymers is/are correct? select all that apply. Condensation polymerization reactions produce small molecules, like H2O, as byproducts to the polymer formation Addition polymers must be made from monomers which have at least one double or triple bond somewhere in the molecule. Polypropylene and polyethylene are high molecular weight alkenes.
The expression of genetic information requires two template-based polymerization reactions. (i) Name the two polymerization reactions. (ii) What are the a.) templates, b.) products, c.) catalyzing enzymes of both reactions? d.) what kind of bond is formed, and e.) which bonds are broken in each polymerization reaction to provide the free energy for polymerization? Most proteins that bind DNA sequence-specifically make contact with bases in the major groove, rather than the minor groove. How can this finding be explained? Name...
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Multiple Choice, T/F Questions 1. Which of the following are TRUE (T) or FALSE (F) regarding Diels-Alder reactions? a) The reaction involves syn addition. _b) The reaction occurs in multiple steps. c) The reaction is a [4+2] A cycloaddition. d) The adduct formed fasted is the exo isomer. e) Electron donating groups activate the diene. f) Electron withdrawing groups activate the dienophile. 2. The compound at the right does not undergo Diels-Alder reaction because: a) ring systems cannot function as...
2. Which of the following statements is true of cyclic forms of 6-carbon sugars? a. Conversion of the linear form to the cyclic form results from a reaction between the 0 3 carbonyl C and an alcohol in the same molecule. b. Six-C sugars only form 6-membered rings c. The cyclic form has the same number of chiral centers as the linear form. d.xAt room temperature in aqueous solutions, glucose is primarily in the linear form Both a and b...