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93851.

(--CH_(2)-overset(CH_(3))overset("|")underset(CH_(3))underset("|")"C "-CH_(2)-overset(CH_(3))overset("|")underset(CH_(3))underset("|")"C "--)_(n)is a polymer having monomer units ........................

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Solution :`(--CH_(2)-overset(CH_(3))overset("|")UNDERSET(CH_(3))underset("|")"C "-CH_(2)-overset(CH_(3))overset("|")underset(CH_(3))underset("|")"C --)_(n)` can be OBTAINED by addition polymerization as shown below.
Discussion
93852.

-CH_(2)-OH on oxidation gives

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`-COOH`
`-CHO`
`gtC=O`
`gtCH_(2)`

ANSWER :A
Discussion
93853.

.................... Cell is used in pacemakers, electronic watches and cameras.

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SOLUTION :MERCURY BUTTON
Discussion
93854.

............... cause a controlled and reversible loss of consciousness by affecting central nervous system.

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SOLUTION :GENERAL ANAESTHETICS
Discussion
93855.

......... catalyst is used to convert sugar into Glucose and Fructose.

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INVERTASE
Zymase 
Diastase
Urease 

SOLUTION :Invertase
Discussion
93856.

........ catalyst is used in polymerization of propylene.

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Solution : Zeigler - Natta (or) `TiCl_(4) + Al(C_(2)H_(5))_(3)`
Discussion
93857.

...... catalyst is used in decomposition of ozone.

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`NO_(2)`
`CO_(2)`
`NE`
`Cl_(2)`

SOLUTION :`Cl_(2)`
Discussion
93858.

The acid that cannot be prepared by Grignard reagent

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`CH_(3)-C_(2)H_(5)`
`CH_(3)-OCH_(3)`
`C_(2)H_(5)-O-C_(2)H_(5)`
`CH_(3)-OCH_(2)CH_(3)`

Answer :B
Discussion
93859.

................ cannot be prepared by grignard reagent since the acid contains only one carbon atom.

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SOLUTION :FORMIC ACID HCOOH
Discussion
93860.

, can be differentiated by :

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Hinsberg TEST
Iso-cyanide test
`NaNO_(2), HCL`, then `BETA`-Naphthol
NaOH

Solution :
Discussion
93861.

( C) and (D) are respectively

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`Mn(BO_(2))_(2), MNO_(2)`
`AgNO_(2),Ag_(2)O`
`Cu(BO_(2))_(2), CuO`
none of these

Solution :`Na_(2)B_(4)O_(7)+AgNO_(3)(aq)+H_(2)Oto AgBO_(2) darr+NaNO_(3)+H_(3)BO_(3) overset("Boiled with WATER")toAg_(2)O darr +H_(3)BO_(3)`
Discussion
93862.

………………………….. brings fission in U^(235).

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ANSWER :SLOW NEUTRONS
Discussion
93863.

+Br_(2)underset(.^(o+)OH)overset(0^(@)C)rarrA Write down the structure of A? What is the use of A ?

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ANSWER :`(##ALN_CHM_C09(II)_E01_772_A01##)`
1-Bromopyrrolidinej-2,5=dopme.
or `N-BromosuC Cinimide (NBS)
It is USED for brominating in ALLYLIC and benzylic HYDROGEN.
`(##ALN_CHM_C09(II)_E01_772_A02##)`
Discussion
93864.

_____ being an aldehyde does not respond Fehling solution test.

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ANSWER :BENZALDEHYDE.
Discussion
93865.

.................... become soft on heating and hard on cooling and they can be remoulded.

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SOLUTION :THERMOPLASTIC
Discussion
93866.

.................... Battery is used in automobiles.

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SOLUTION :LEAD STORAGE
Discussion
93867.

, At time t=0, intial mole of A is 1. Overall half time of the reaction is 15 days. Then calculate the number of mole of C after 45 days if the raio of k_(1):k_(2):k_(3) is 4:2:1

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ANSWER :2
Discussion
93868.

……………………as biocatalysts that catalysea specific biochmicalreaction.

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SOLUTION :ENZYMES
Discussion
93869.

………………..arises due to the presence of more number of metalions as compared to anions.

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SOLUTION :METAL EXCESS DEFECT
Discussion
93870.

………………….. arises due to the presence of less number of cations than the anions.

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SOLUTION :METAL DEFICIENCY
Discussion
93871.

……………..arises due to the dislocation of ions from its crystal lattice.

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SOLUTION :FRENKEL DEFECT
Discussion
93872.

.......... are useful in making tissues free from microorganisms.

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ANTISEPTICS
Disinfectants
Traquilisers 
ANALGESICS 

SOLUTION :Antiseptics
Discussion
93873.

........... are used to demineralise water.

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SOLUTION :CON EXCHANGE RESINS
Discussion
93874.

……………………. Are used as insulating material.

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ANSWER :SILICONES
Discussion
93875.

____________ are substances that enhance the activity of the catalyst.

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SOLUTION :PROMOTERS
Discussion
93876.

…………… aresynthesisedby greenleaves duringphoto synthesis .

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SOLUTION :CARBOHYDRATES
Discussion
93877.

................... are substances which retard the oxidative deteriorations of food.

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SOLUTION :ANTIOXIDANT
Discussion
93878.

_______are produced when a drug binds to more than one type of receptor

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ANSWER :SIDE EFFECTS
Discussion
93879.

………………….. Are high temperature polymers.

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ANSWER :SILICONES
Discussion
93880.

........... are microporous, hydrated alumino silicates.

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SOLUTION :ZEOLITES
Discussion
93881.

......... are added during preparation of medicated soap.

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Deodarants 
Dettol
Neem POWDER 
All of the GIVEN 

SOLUTION :Deodarants
Discussion
93882.

................... are drugs that used to reduce fever and prevent platelet coagulation

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SOLUTION :ANTIPYRETIC
Discussion
93883.

........... are complex protein molecules and catalyse the chemical reaction in living organism.

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SOLUTION :ENZYMES
Discussion
93884.

........... and ........... are used in petroleum refining and refining of vegetable oil.

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SOLUTION :Fuller.s EARTH , SILICA GEL
Discussion
93885.

_______ and ______ are useful antioxidants forwine and beer .

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Sulphur TRIOXIDE and sulphate
BHT and BHA
Sulphur DIOXIDE and sulphite
None of these

Answer :C
Discussion
93886.

_________ and ________ are formed by the disproportionation reactionof CrO_(4)^(3-) ion in acid medium.

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SOLUTION :`OVERSET(VI)(CrO_(4)^(2-)), Cr^(3+)`
Discussion
93887.

_________, __________ and _________among the d - block elements are not considered as transition elements.

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SOLUTION :ZN, CD, HG
Discussion
93888.

…………….. Amine does not react with Hinsberg's reagent.

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`1^@`
`2^@`
`3^@`
None

Answer :B
Discussion
93889.

……………………….alkyl halides undergo substitution by SN^2 reaction whereas …………………….and …………………. alkyl halides undergo substitution by SN^1 reaction.

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SOLUTION :`1^@,2^@, 3^@`
Discussion
93890.

……………….. alcohols undergo dehydration by E_2 mechanism whereas ………………. Alcohols undergo dehydration by E_1 mechanism.

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SOLUTION :PRIMARY, TERTIARY
Discussion
93891.

............ acts on the central nervous system by blocking the neuro transmitter dopamine in the brain.

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SOLUTION :TRANQUILIZERS
Discussion
93892.

________ act as a shok absorber and lubricant.

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GLYCOGEN
RIBOSE
STARCH
hyaluronate

SOLUTION :hyaluronate
Discussion
93893.

. A sample of 0.42 gm os (A) with excess of MeMgBr gives 224 ml of CH_4 (g) at S.T.P Give the structure of (A) and write the equations involved.

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Solution :Reaction of `(A)` with ammoniacal `AgNO_3` (Tollens' reagent, `[AG(NH_3)_2]OH)` shows that `(A)` is either an aldehyde or terminal triple bond. But very slow reaction (or `(A)` does not react appreciably) with Lucas reagent SUGGESTS `(A)` to be a `1^@` alcohol. Since compound `(A)` has only one oxygen atom, it can be either an aldehyde or a `1^@` alcohol.
`DU i N (A) = ((2n_C +2)-n_H)/(2) = ((5 xx 2 + 2 - 8))/(2) = 2^@`.
Two `DU` in `(A)` can be accounted for one terminal triple that `(A)`with `G.R` to give `CH_4 (g)` suggests acitve `H` atom in `(A)`. ACTIVE `H` atom in `(A)` is due to the terminal triple bond and `1^@` alcohol.
Moreover, the formation of n-pentane from `(A)` suggests that `(A)` is a straight-chain compound containing terminal triple bond and `1^@` alcohol group at the other end of the chain. So, the structure is `(A)` is as follows :

One mole of compound `(A)` would produce `2 mol` of `CH_4 (g)` (molecular mass of `A(C_5 H_8 O) = 84)`.
`:.` 84 gm of (A) gives `2 xx 22.4` litres of `CH_4` (g) at S.T.P
0.42 gm of (A) gives `overset (2 xx 22.4 xx 0.42) underset (84)rarr = 0.224 litres`.
=`224 ml`.
The volume of `CH_4 (g)` correcponds to the volume given in the problem. Hence, three are two active `H` atoms in `(A)` that react with `G.R`.
Reactions :
.
Discussion
93894.

(a) (i) What are condensation polymers? Give an example. (ii) Give the IUPAC of the monomer of natural rubber. (b) What are Biodegradable polymers? Give an example.

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Solution :(a) (i) Condensation reaction between two different bifunctional or trifunctional MONOMERIC UNITS are condensation polymers.
Eg: Nylon 6,6
(II) isoperene or 2-methyl 1,3-butadiene.
(b) Polymers cause acute environmental problems and remain undergraded for LONG time.
,Eg: Nylon-2 - nylon - 6.
Discussion
93895.

(a) Complete and balance the following reaction (i) SO_(2) + H_2S overset("Oxidation")(rarr) (ii) FeCl_3 + H_2O overset("Hydrolysis")(rarr) (b) Mention two characteristics of enzyme catalysis (c) What is the sign of DeltaSfor the adsorption of gas on solids?

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SOLUTION :(a) `SO_(2)+2H_(2)Sunderset("oxidation")to3S+2H_(2)O`
sulphur SOL
`FeCl_(3)+3H_(2)Ounderset( "hydrolysis")Fe(OH)_(3)+3HCI`Cl,
Ferric HYDROXIDE
(b) (i) Enzymes are highly efficient.
(ii) They are highly specific in nature.
(C) `DeltaS` is negative.
Discussion
93896.

( A) Benzamide is amphoteric in nature. (R) Benzoyl chloride is more reactive than acetyl chloride towards nucleophilic substitution reactions.

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If both (A) and ( R) are CORRECT and ( R) is the correct EXPLANATION of (A).
If both (A) and (R) are correct but (R) is not correct explanation of (A).
If (A) is correct but ( R) is incorrect.
If (A) is incorrect but ( R) is correct.

ANSWER :C
Discussion
93897.

+5 oxiation state of bismuth is less stable then +3. Why?

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Solution :Due to the highest atomic SIZE, largest nuclear charge and inert effect, `+5` oxidation STATE of Bi is less STABLE than `+3.`
Discussion
93898.

+4 oxidation state is most inportant for

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Pa
Np
CM
TH

ANSWER :D
Discussion
93899.

(+2)2- Methylbutan-1-ol and (-2)2-Methylbutan -1-ol have different values for which property?

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BOILING point
Relative point
Refractive index
SPECIFIC rotation

SOLUTION :(+) 2-Methylbuatn -1-ol is DEXTROROTATORY and (-) 2-Methylbutan-1-ol is Leavorotatory, called ENANTIOMERS.
Discussion
93900.

(+-) 2-Phenylpropanoic acin on treatment with (+) 2-butanol gives (A) and (B). Deduce their structures and also establish stereochemical relation between them.

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ANSWER :N//A
Discussion