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28251.

The monomer unit of orlon is ………….

Answer»

Acrolene
CHLOROPRENE
ACRYLONITRILE
Isoprene

Solution :Acrylonitrile
Discussion
28252.

The maximum number of bond and pi bond can be formed between two atoms are respectively.

Answer»

4,3
3,2
2,3
3,1

Answer :A
Discussion
28253.

The maximum number of positionalisomers for an alkene with molecular formula C_4H_8 is:

Answer»

2
3
4
5

Answer :C
Discussion
28254.

The maximum number of 90^(@) angles between bond pair - bond pair of electrons is observed in

Answer»

1. `dsp^(2)` HYBRIDIZATION
2. `SP^(3)d` hybridization
3. `dsp^(3)`hybridization
4. `sp^(3)d^(2)` hybridization

Answer :D
Discussion
28255.

The maximum no of atoms in a plane for the compound formed by reaction of SbF_(5) with SO_(2) is :

Answer»

8
6
7
9

Solution :`SbF_(5) + SO_(2) RARR F_(5)Sblarr SO_(2)`
Discussion
28256.

The monomer of the polymer : ~CH_2-underset(CH_3)underset(|)overset(CH_3)overset(|)C-CH_2-underset(CH_3)underset(|)overset(CH_3)overset(|)C~ is

Answer»


`CH_3CH=CHCH_3`
`CH_3-CH=CH_2`
`(CH_3)_2C=C(CH_3)_2`

ANSWER :A
Discussion
28257.

The maximum number of 3d-electrons having spin quantum number s=+1//2 is

Answer»

10
5
2
1

Answer :A
Discussion
28258.

The monomer of the polymer [-CH_(2)-overset(CH_(3))overset("|")underset(CH_(3))underset("|")"C "-CH_(2)-overset(CH_(3))overset("|")underset(CH_(3))underset("|")"C "-CH_(2)-]_(n)

Answer»

`H_(2)C = C(CH_(3)) _(2)`
`(CH_(3)) _(2)C = C(CH, _(3)), _(2)`
`CH_(3)CH = CH.CH_(3)`
`CH_(3)CH = CH_(2)`

Answer :A
Discussion
28259.

The maximum negative electron gain enthalpy of halogens in their respective periods is because of

Answer»

SMALL SIZE in their RESPECTIVE period
HIGH electro negativity in their respective periods
All the above

Solution :Conceptual
Discussion
28260.

The monomerof the polymerwhich is used as a substitute for wool is

Answer»

styrene
tetrafluoroethene
CHLOROETHENE
prop-2-enenitrile

SOLUTION :`CH_2=CH-CN`
Discussion
28261.

The maximum melting point at about the middle of transition metal series indicates that .......... configuration is favourable for strong .... ...... attraction.

Answer»

SOLUTION :`d^(5)` INTER ATOMIC
Discussion
28262.

The monomer required for the preparation of buna-N is

Answer»

`CH_2=CH-CH_2-CH_3 and CH_2=CH-CN`
`CH_2=CH=CH=CH_2 and CH_2=CH-CN`
`CH_2=C=CH-CH_3 and CH_2=CH-CN`
`CH_2=CH-CH=CH_2 and CH_3-CH_2-CN`

ANSWER :B
Discussion
28263.

The maximum magnetic moment is shown by the ion with the outer electronic configuration of :

Answer»

`3d^(6)`
`3d^(9)`
`3d^(5)`
`3d^(4)`

Answer :C
Discussion
28264.

The monomer of terylene are .............and ...................

Answer»


ANSWER :tetrephthalic ACID or its methyl ESTER , ethylene glycol
Discussion
28265.

The monomer of PVC is

Answer»

ethylene
CHLOROETHENE
VINYL cyanide
none of these

Solution :chloroethene
Discussion
28266.

The maximum efficiency of a heat engine operating between 100^(@)C and 25^(@)C is

Answer»

0.2011
0.222
0.2517
None

Answer :A
Discussion
28267.

The maximum efficiency of a steam engine operating between 100^(@)C and 25^(@)C is

Answer»

`20%`
`22.2%`
`25%`
`30%`

ANSWER :A
Discussion
28268.

The monomer of Teflon polymer is difluoroethene.true or false?

Answer»

SOLUTION :tetrafluorothene
Discussion
28269.

The maximum ease of abstraction of a hydrogen atom by a chlorine atom is shown by

Answer»

`(CH_(3))_(3)C - CH_(3)`
`(CH_(3))_(3) CH`
`(C_(6) H_(5))_(3) CH`
`(CH_(3))_(2) CH_2`

Solution :The more stable the RADICAL the more EASILY it is formed . Now the ORDER of stability of free radicals decreases in the order :
`(C_6 H_5)_3 overset(*)(C) gt (CH_3)_(3) overset(*)(C) gt (CH_3)_3 overset(*)(C)CH_2 gt (CH_(3) )_(2) overset(*)(C)H`, therefore , H-atom is most easily abstracted from `(C_6 H_5)_3 overset(*)(C)`.
Discussion
28270.

Give the structure of the monomer of PVC.

Answer»

ethylene
CHLOROETHENE
VINYL cyanide
none of these

Solution :chloroethene
Discussion
28271.

The maximum displacement perpendicular to the motion of the wave is known as

Answer»

WAVELENGTH
intensity
AMPLITUDE
FREQUENCY

ANSWER :C
Discussion
28272.

White the names and structures of the monomers of the following polymers : (i) Polystyrene, (ii) Dacron, (iii) Teflon,

Answer»

`C_2H_5-CH=CH_2`
`CH_2=CHCl`
`C_6H_5-CH=CH_2`
`CH_2=CHCHO`

ANSWER :A
Discussion
28273.

The maximum densityof water is reached at a temperature

Answer»

273 K
277 K
373 K
none of above

Answer :B
Discussion
28274.

The monomer of poly acrylonitrile is

Answer»

VINYL CHLORIDE 
Vinyl ALCOHOL 
Vinyl cyanide 
Adipic acid

Answer :C
Discussion
28275.

The maximum covalency for representative elements is equal to (excluding 1st and 2nd period)

Answer»

the NUMBER of UNPAIRED p-electrons
the number of PAIRED d-electrons
the number of unpaired s and p-electrons
the ACTUAL number of s and p-electrons in the OUTERMOST shell

Answer :D
Discussion
28276.

The monomer of PMMA is :

Answer»

`CH_2=UNDERSET(CH_3)underset(|)C-COOCH_3`
`CH_2=CHCN`
`CH_2=underset(C_2H_5)underset(|)C-COOCH_3`
`CH_2=CHCl`.

ANSWER :A
Discussion
28277.

The maximum covalency of boron in sodium borofuoride is :

Answer»

4
6
2
8

Solution :`NA[BF_(4)]`. MAXIMUM covalency of BORON is 4.
Discussion
28278.

The monomer of PAN is ...............

Answer»


ANSWER :ACRYLONITRILE
Discussion
28279.

The maximum covalency of nitrogen is

Answer»

2
3
4
5

Answer :3
Discussion
28280.

The monomer of natural rubber is ..................

Answer»

SOLUTION :cis-isoprene( OR ) 2-methyl BUTA -1,3-diene )
Discussion
28281.

The maximum catenation tendency of carbon is due to :

Answer»

1.Its tetravalency
2.Larger strength of carbon to carbon BOND as compared to that of other atoms
3.Its electronegativity value close to other atoms (H, N, O, S) with which it forms BONDS
4.Its tendency to form MULTIPLE bonds.

Solution :The larger catenation tendency of carbon is because of greater strength of `C-C` bond as compared to that other atoms.
Discussion
28282.

The monomer of Nylon-6 is/are

Answer»



`F_2C=CF_2`
`H_(2)C=CH_(2)`

SOLUTION :The MONOMER USED in the preparation of Nylon-6 is caprolactum.
Discussion
28283.

The maximum amount of BaSO_(4) precipitated on mixing BaCl_(2)(0.5M) with H_(2)SO_(4)(1M) will correspond to

Answer»

0.5 M
1.0 M
1.5 M
2.0 M

Answer :A
Discussion
28284.

The monomer of following polymer is [-O-underset(CH_3)underset(|)CH-CH_2-COO-underset(C_2H_5)underset(|)CH-CH_2-CO-]_n

Answer»

`HO-CH_2-CH_2-COOH`
`HO-UNDERSET(CH_3)underset(|)CH-CH_2-COOH`
`HO-underset(C_2H_5)underset(|)CH-CH_2-COOH`
both B and C

ANSWER :D
Discussion
28285.

The maximum amount of BaSO_(4) that can be obtained on mixing 0.5 mole BaCl_(2) with 1 mole H_(2)SO_(4) is:

Answer»

0.5mol
0.1mol
0.15mol
0.2mol

Solution :`H_(2)SO_(4)+BaCl_(2)rarrBaSO_(4)+2HCI`
0.5 MOLE `BaCl_(2)` will react with 0.5 mole `H_(2)SO_(4)` to GIVE 0.5 mole `BaSO_(4)`.
Discussion
28286.

The maximum and minimum melting points of first and second transition series respectively are observed with

Answer»

`Cr and Zn`
`Cr and HG`
`Cr and Cd`
`MO and Cd`

ANSWER :C
Discussion
28287.

The monomer of Buna-S are :

Answer»


`CH_(3)-UNDERSET(CH_(3))underset(|)(CH)-CH=CH_(2)+CH_(2)=CH-CN`

Answer :C
Discussion
28288.

The maximum amount of BaSO_4precipitatedon mixing BaCl_2(aq. 0.5M) and H_2SO_4 (aq. 1M) will correspond to:

Answer»

1.0M
0.5 M
0.25 M
1.5 M

Solution :`BaCl_2 + H_2SO_4 to BaSO_4 + 2HCL`
1 MOL of `BaCl_2` GIVES = 1 mol of `BaSO_4`
0.5 mol of `BaCl_2` gives = 0.5 mol of `BaSO_4`
Discussion
28289.

The monomer of buna- S rubber are

Answer»

VINYL CHLORIDE and sulphur
butadine
styrene and butadine
isoperene and butadiene

Answer :C
Discussion
28290.

The maximum amount ofBaSO_4 precipitated on mixing 20 ml of 0.5 M BaCl_2 with 20 ml of 1 M H_2SO_4 is :

Answer»

0.25 mole
0.5 mole
1 mole
0.01 mole

Answer :D
Discussion
28291.

The maximum allowable level of Nitrates in drinking water as set by U.S. is 45 mg NO_(3)^(-) ions per dm^(3) , the level in ppm is

Answer»

15
30
45
60

Answer :C
Discussion
28292.

The monomer of acrilon is

Answer»

VINYL CYANIDE
vinyl chloride
vinyl bromide
vinyl alcohol

Solution :vinyl cyanide
Discussion
28293.

The matte obtained in the callurgy of copper has the approximate Composition

Answer»

`FES +CUO`
`Cu_2 S + FEO`
`Cu_2 S + FeS`
`CUS +FeS_2`

ANSWER :C
Discussion
28294.

The matter has highest entropy in:

Answer»

SOLID state
Liquid state
Gaseous state
Equal in all

Answer :C
Discussion
28295.

The momentum of a particle having ade-Broglie wavelenth of 10^(-17)m is (h=6.625xx10^(-34)Js)

Answer»

`6.625xx10^(-17)kgms^(-1)`
`3.3125xx10^(-7)kgms^(-1)`
`13.25xx10^(-17)kgm^(-1)`
`26.5xx10^(-7)kgms^(-1)`

SOLUTION :`LAMDA=h/p` or `p=h/(lamda)=(6.625xx10^(-34))/(10^(-17))`
`=6.625xx10^(-17)kgms^(-1)`
Discussion
28296.

The molerity and molality of an aqueous solution of H_(2)SO_(4) "as" M_(1) and M_(2) respectively. If the molecular mass of H_(2)SO_(4) is M, density of the solution is

Answer»

`M_(2)(M_(1)+(M)/(1000))g//ml`
`M_(2)((1)/(M_(1))+(M)/(1000))g//ml`
`M_(2)((1)/(M_(2))+(M)/(1000))g//ml`
`M_(2)(M_(2)+(M)/(1000))g//ml`

ANSWER :C
Discussion
28297.

The matte obtained in the extraction of copper contains:

Answer»

`FeSiO_2`
`SiO_2 + FES`
`FeS + Cu_2S`
`CUS + SiO_2 + FEO`

ANSWER :C
Discussion
28298.

The matte is impure substance otained during extraction of:

Answer»

Cu
Fe
Pb
Al

Answer :A
Discussion
28299.

The molten matte obtained from the blast furnace during smelting of copper contains approximately:

Answer»

`90% Cu`
`45% Cu`
`29% Cu`
`80% Cu`

ANSWER :B
Discussion
28300.

Which is used for the extraction of cadmium from cadmium sulphate ?

Answer»

Roasting
Reduction
Oxidation
Electrolysis

Answer :A
Discussion