Which of the following statements is correct | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) For a spontaneous reaction, the Gibbs free energy change must be negative, i.e.,$\Delta G < 0$.In a polymerization reaction, many monomer units co

Vedclass · Accepted Answer

$\Delta G < 0, \Delta H < 0, \Delta S < 0$

Vedclass · Answer

(A) For a spontaneous reaction, the Gibbs free energy change must be negative, i.e.,$\Delta G In a polymerization reaction, many monomer units combine to form a single polymer chain $(n A \rightarrow A_n)$.This process leads to a decrease in the number of particles and an increase in order, resulting in a decrease in entropy, i.e.,$\Delta S Using the Gibbs-Helmholtz equation: $\Delta G = \Delta H - T \Delta S$.Since $\Delta G For $\Delta G$ to remain negative, the enthalpy change $\Delta H$ must be negative and its magnitude must be greater than the magnitude of $T \Delta S$, i.e.,$\Delta H < 0$.

$A$. Teflon	$I$. $SnCl_2$
$B$. Anionic polymerisation	$II$. $C_2F_4$
$C$. Cationic polymerisation	$III$. Bakelite
$D$. Thermosetting polymer	$IV$. Polystyrene
	$V$. $RLi$

List-$I$	List-$II$
$A$. $(CH_2-C(Cl)=CH-CH_2)_n$	$I$. Cross-linked network
$B$. Nylon-$6,6$	$II$. Elastomer
$C$. $HDP$	$III$. Fibre
$D$. Melamine-formaldehyde	$IV$. Ziegler-Natta catalyst

List-$I$ (Chemicals)	List-$II$ (Use / Preparation / Constituent)
$(a)$ Alcoholic potassium hydroxide	$(i)$ Electrodes in batteries
$(b)$ $Pd / BaSO_4$	$(ii)$ Obtained by addition reaction
$(c)$ $BHC$ (Benzene hexachloride)	$(iii)$ Used for $\beta$-elimination reaction
$(d)$ Polyacetylene	$(iv)$ Lindlar's catalyst

Which of the following statements is correct for a spontaneous polymerization reaction?

Similar Questions

Match the following:
$A$. Teflon $I$. $SnCl_2$
$B$. Anionic polymerisation $II$. $C_2F_4$
$C$. Cationic polymerisation $III$. Bakelite
$D$. Thermosetting polymer $IV$. Polystyrene
$V$. $RLi$

The correct answer is:

Match the following:
List-$I$ List-$II$
$A$. $(CH_2-C(Cl)=CH-CH_2)_n$ $I$. Cross-linked network
$B$. Nylon-$6,6$ $II$. Elastomer
$C$. $HDP$ $III$. Fibre
$D$. Melamine-formaldehyde $IV$. Ziegler-Natta catalyst

Polyethylene is prepared from calcium carbide as follows:
$CaC_2 + 2H_2O \to Ca(OH)_2 + C_2H_2$
$C_2H_2 + H_2 \to C_2H_4$
$nC_2H_4 \to (-CH_2-CH_2-)_n$
Calculate the amount of polyethylene produced from $64 \ kg$ of $CaC_2$. (in $kg$)

Vedclass Test Series

Exam Paper Generator

Online Exam Module