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22001.

The wavelength associated with a ball of mass 100 g moving with a speed of 10^(3) cm "sec"^(-1) (h=6.6xx10^(-34)Js^(-1)) is

Answer»

`6.6xx10^(32)cm`
`6.6xx10^(-27)cm`
`6.6xx10^(27)cm`
`6.6xx10^(-32)cm`

Solution :`lamda=h/(mv)=(6.6xx10^(-34)KGMS^(-1))/(100xx10^(-3)kgxx10^(3)xx10^(-2)MS^(-1))`
`=.6xx10^(-32)cm`
Discussion
22002.

Which complex has square planar shape dsp^2hybridisation:

Answer»

`[Ni(CN)_4]^(2-)`
`[Cu(NH_3)_4]^(2+)`
`[PtCl_4]^(2-)`
All

Answer :D
Discussion
22003.

Which has highest pk_a value?

Answer»

Phenol
Ethanol
o-Nitrophenol
o-Cresol

Answer :D
Discussion
22004.

What is cellulose diacetate ?

Answer»

Semisynthetic POLYMER
Plasticizer
NATURAL polymer
Synthetic polymer

Solution :CELLULOSE of semisynthetic POLYMERS
Discussion
22005.

Which of the followingamino acidsare achiral ?

Answer»

ALANINE
LEUCINE
PROLINE
GLYCINE

ANSWER :A
Discussion
22006.

Which is the storage of vitamin-A?

Answer»

RETINOL
BENZYL alcohol
PHENOL
Ascorbic ACID

Solution :Retinol
Discussion
22007.

What is meant by the term peptization ?

Answer»

SOLUTION :The process of converting a FRESHLY prepared PRECIPITATE into colloidal solution by adding a SUITABLE electrolyte (peptising agent) is called peptization.
Discussion
22008.

Whichof the following is not a natural polymer ?

Answer»

Starch
Nucleic ACID
Polystryrene
Protein

ANSWER :C
Discussion
22009.

Using IUPAC norms write the formulas for the following: Tetrabromidocuprate(II)

Answer»

SOLUTION :`[CuBr_(4)]^(2-)`
Discussion
22010.

The volume of a cubic unit cell is xcm^(3) whose 26% remains unoccupied by the constituent particles. If the radius of each particle is 0.3535x^(1//3)cm, then the number of particles per unit cell is-

Answer»

1
2
4
3

Answer :C
Discussion
22011.

The unit of specific conductance is:ohm,ohm^-1cm^-1ohm^-1cmohm^2

Answer»

`OHM`
`ohm^-1cm^-1`
`ohm^-1cm`
`ohm^2`

ANSWER :B
Discussion
22012.

Which one ofthefollowingisa mineral ofiron ?

Answer»

MALACHITE
CASSITERITE
PYROLUSITE
MAGNETITE

ANSWER :D
Discussion
22013.

Why are carboxylic acids more acidic than alcohols or phenols although all of them have hydrogen linked to a oxygen atom?

Answer»

SOLUTION :The anions left after is removal of hydrogen from carboxy acid, alcohol and phenol are `RCOO^(-)`, `Ro^(-)` and `ARO^(-)` respectively.
Out OFTHESE `RCOO^(-)` is stabilised to the maximum extent. Therefore carboxy acids are more ACIDIC than alcohol or phenols.
Discussion
22014.

Write one example for heterogeneous catalysis.

Answer»


ANSWER :Iron used in the HABER PROCESS for the MANUFACTURE of `NH_3`
Discussion
22015.

The standard reduction potential at 290K for the following half reactions are, (i)Zn^(2+) +2e rarrZn(s),E^@ =-0.762 V (ii)Cr^(3+) +3e rarr Cr(s), E^@=-0.740 V (iii)2H^+ 2e rarrH_2(g),E^@=-0.000V (iv)Fe^(3+) +e rarr Fe^2+,E^@=+0.77V Which it the strongest reducing agent :

Answer»

Zn
Cr
`FE^(2+)`
`H_2`

ANSWER :A
Discussion
22016.

Which of the following is not a crystalline solid?

Answer»

KCl
CsCl
GLASS
Rhombic S

Solution :Glass is amphorphous SOLID.
Discussion
22017.

Which of the following does not turn schiff's reagent to pink?

Answer»

Formaldehyde
Benzaldehyde
ACETONE
Acetaldehyde

SOLUTION :Acetone
Discussion
22018.

WhenPhNO_2 is reduced in alkaline medium , the product is

Answer»

`PH-OVERSET(O)overset(UARR)N=N-N-PH` (Azoxy-benzene)
`Ph-N=N-Ph `(Azohenzene)
`Ph-NH-NH -Ph` (HYDRAZOBENZENE)
All

Answer :D
Discussion
22019.

Universe is an example of

Answer»

OPEN system
Close system
Isolated system
Closed ISOTHERMAL system

Answer :2
Discussion
22020.

When propionic acid is treated with aqueous sodium bicarbonate, CO_(2) is liberated. The 'C' of CO_(2) comes from

Answer»

METHYL group
carboxylic ACID group
methylene group
bicarbonate.

Answer :D
Discussion
22021.

The total crystal field stabilization energy (CFSE) for the complexes [Co(H_(2)O)_(6)]^(3+) and [CoF_(6)]^(3-) are respectively : (P is the pairing energy)

Answer»

`-24dq+2P" and "-24dq+2P`
`-24dq+2P" and "-4.0dq`
`-4.0dq" and "-4.0dq`
`4.0dq" and "0`

Solution :`[Co(H_(2)O)_(6)]^(3+),d^(6)"",""[CoF_(6)]^(3-),d^(6)`
`t_(2g)^(2,2,2),EG^(0,0)"",""t_(2g)^(2,1,1),eg^(1,1)`
`CFSE=-2.4Delta_(0)+2P"",""CFSE=-1.6Delta_(0)+1.2Delta_(0)`
`Delta_(0)=10" "dq"",""=-4" "dq`
Discussion
22022.

What is the relationship between resistance and conductance ?

Answer»

SOLUTION :INVERSELY PROPORTIONAL`G=1/R`
Discussion
22023.

When HCHO is treated with C_6H_5CHO in presence of NaOH, the produces are:

Answer»

`CH_3OH` and `HCOONA`
`C_6H_5CH_2OH` and `C_6H_5COONa`
`CH_3OH` and `C_6H_5COONa`
`HCOONa` and `C_6H_5CH_2OH`

ANSWER :D
Discussion
22024.

Which of the following would cause the percent ionization of week acid to increase ?

Answer»

Addition of a strong acid
Addition of a salf CONTAINING its conjugate base
DILUTING with more water
The percent IONIZATION of a week acid is a constant and cannot be INCREASED .

Answer :C
Discussion
22025.

What is the correct operation when Br2 is treated with NaF, NaCl and Nal taken in three test tukes lavelled (X), (Y) and (Z)?

Answer»

`F_(2)`is liberated in (X) and `Cl_(2)` in (Y)
Only `l_(2)` is liberated in (Z).
Only `Cl_(2)` is liberated in (Y)
Only `F_(2)` is liberated in (X)

ANSWER :B
Discussion
22026.

Which isomers of C_(4)H_(9)X shows optical isomerism ?

Answer»

n-butyl halide
iso-butyl halide
sec-butyl halide
t-butyl halide

Answer :C
Discussion
22027.

Whichcarboxylicacidcan bepreparedformp - bromotolune (a)by directoxidation , (b) by free radical chlorinationfollowed bynitrilesynthesis ?

Answer»

SOLUTION :
Discussion
22028.

Which of the following is not the correct match ?

Answer»

LEACHING : Ag 
Zone refining : SN 
Liquation : PB 
Van Arkel : Zr 

Solution :Sn is REFINED by Liquation.
Discussion
22029.

Whatare the products of hydrolysis of sucrose?

Answer»

SOLUTION :Sucroseon HYDROLYSIS GIVES on MOLECULE each of glucoseand FRUCTOSE .
Discussion
22030.

Valine, phenyl alanine, histidine, lysine, alanine.

Answer»

SOLUTION :Alamine. It ISAN essentialaminoaicdwhereaseothers are ESSENTIALAMINOACIDS.
Discussion
22031.

Why are diazonium salts of aromatic amines more stable than those of aliphatic amines?

Answer»

Solution :The diazonium salts of AROMATIC amines are more stable than those of ALIPHATIC amines due to the DISPERSAL of positive charge on the BENZENE RING.
Discussion
22032.

What happens when phenol is treated with diazonium chloride in presence of NaOH?

Answer»

Solution :PHENOL couples with BENZENE DIAZONIUM chloride in an alkaline solution to form p-hydroxy azobenzene (a red orange DYE).
Discussion
22033.

Which one of the following elements will not react with diluet HCI to produce H_(2)

Answer»

Hg
AI
Mg
Fe

Answer :A
Discussion
22034.

The two solubility of BaSO_(4) in water can be attributed to

Answer»

High lattice energy
Dissociation energy
Low lattice energy
Ionic BOND

SOLUTION :High lattice energy of `BaSO_4` CAUSES low SOLUBILITY of `BaSO_4` in water.
Discussion
22035.

Write the first hydrolysis product of alkanenitrile.

Answer»

SOLUTION :`RCONH_2`
Discussion
22036.

Which of the following polymer is biodegradable ?

Answer»

`(--CH_2 - UNDERSET(Cl) undreset(|)C = CH - CH_2--)_n`
`(-- CH_2 - CH = CH - CH_2- CH_2 - OVERSET(CN)overset(|)CH --)_n`
`(--O-underset(CH_3)underset(|)CH - CH_2 - underset(O)underset(||)C - O- underset(CH_2CH_3) overset(|)CH-CH_2 - underset(O)underset(||)C --)_n`
`(--overset(H)overset(|)N-(CH_2)_6 - overset(H)overset(|)N-overset(O)overset(||)C-(CH_2)_4 - overset(O)overset(||)C --)_n`

Solution :`(--O- underset(CH_3)underset(|)CH - CH_2 - underset(O)underset(||)C - O - underset(CH_2CH_3)underset(|)CH- Ch_2 - underset(O)underset(||)C --)_n` It is a biodegradable polymer.
Discussion
22037.

Which is correct statement ?

Answer»

Nitric OXIDE is ISOELECTRONIC with `CO_2`
Nitric oxide is diamagnetic
Nitric Oxide is an ENDOTHERMIC compound
Nitric oxide gas is used as GENERAL anaesthetic

Answer :C
Discussion
22038.

Which one of the following is an example of a thermosetting polymer ?

Answer»

`(--CH_(2)-UNDERSET(Cl) underset(|)(C)=CH-CH_(2)--)_(n)`
`(--CH_(2)-underset(Cl) underset(|)CH--)_(n)`
`[--overset(H)overset(|)(N)-(CH_(2))_(6)-overset(H)overset(|)(N)-overset(O)overset(||)(C)-(CH_(2))_(4)-overset(O)overset(||)(C)---]_(n)`

SOLUTION :Novolac , a condensation POLYMER of phenol and formaldehyde , is a thrmosetting polymer.
Neoprene rubber (a) and PVC (b) are themoplastic polymers while nylon-66 (c) is a polyamide which is commonly KNOWN as fibre .
Discussion
22039.

Which is not correct about monosaccharides ?

Answer»

OPTICALLY ACTIVE polyhydroxy carbonyl compounds.<BR>Fructose and GLUCOSE can not be distinguish by`Br_(2)//H_(2)O`
Glucose and mannose are anomers.
Fructose and glucose can not be distinguish by Fehling solution.

Solution :N//A
Discussion
22040.

Which one of the following is a copolymer ?

Answer»

BUNA - S
Polyvinyl CHLORIDE
Polypropylene
Poly - CIS - ISOPRENE

ANSWER :A
Discussion
22041.

Write the product of following reaction

Answer»


ANSWER :`(##RES_CHM_CCAK_E01_018_A01##)`
Discussion
22042.

What is the weight of bromine required to give 0.1 mole of a white precipitate with phenol ?

Answer»

Solution :The reaction between phenol and BROMINE water is

One mole of white solid is formed from three mole `Br_2`. Therefore 0.1 mole of solid is OBTAINED from 0.3 mole `Br_2`.
The WEIGHT of bromine REQUIRED = 0.3 x 160g
Discussion
22043.

What are the tests used to identify the type of emulsion?

Answer»

Solution :(i) Dye test : . A small amount of dye soluble in OIL is i added to the EMULSION. The emulsion is shaken WELL. The aqueous emulsion will not take the colour WHEREAS oily emulsion will take up the colour of the dye.
(ii) Viscosity test : Viscosity of the emulsion is determined Founded by EXPERIMENTS. Oily emulsions will have higher value than aqueous emulsion.
(iii) Conductivity test : Conductivity of aqueous emulsions arealways higher than oily emulsions.
(iv) Spreading test : Oily emulsions spread readily than aqueous emulsion when spread on an oily surface.
Discussion
22044.

When 200 ml of aqueous solution of HCl (pH = 2) is mixed with 300 ml of of an aqueous solution of NaOH (pH = 12), the pH of the resulting mixture is :

Answer»

10
`2.7`
`4.0`
`11.2`

SOLUTION :`underset(pH = 2)underset(200 ml)(HCl)+underset(pH=12)underset(300 ml)(NaOH)rarr NaCl+H_(2)O`
For HCl solution
`pH=-log[H^(+)]=2`
`therefore [H^(+)]=10^(-2)M`
Moles of `H^(+)` in 200 ml
`=(10^(-2))/(1000)xx200`
`=2xx10^(-3)` moles
For NaOH solution, `pH=14-pOH=12`
`therefore pOH = 2`
`[OH^(-)]=10^(-2)M`
Moles of `[OH^(-)]`in 300 ml solution
`=(10^(-2))/(1000)xx300`
`=3xx10^(-3)` moles
`therefore` Moles of `OH^(-)` left
`=3xx10^(-3)-2xx10^(-3)=10^(-3)` moles
Total volume = 500 ml
`therefore [OH^(-)]=(10^(-3))/(500)xx1000=2xx10^(-3)M`
`pOH=-log[OH^(-)]=-log(2xx10^(-3))=2.699`
`therefore pH=14-2.699=11.30`
Discussion
22045.

What is the difference in maximum atomicityof oxygen and sulphur?

Answer»

2
3
4
5

Solution :Oxygen MAXIMUM ATOMICITY `=3 RARR O_(3)`
SULPHUR maximum atomicity `=8 rArr S_(8)`
Discussion
22046.

Which on heating with NaOH solution gives inflammable gas?

Answer»

S
Zn
`NH_4Cl`
`I_2`

ANSWER :B
Discussion
22047.

What happen when chlorine reacts with trupentine?

Answer»

Solution :When chlorine BURNT with TURPENTINE it forms carbon and hydrochloric acid.
`underset("(Turpentine)")(C_(10)H_(16)+8Cl_(2))overset(Delta)RARR underset("(Carbon)")(10C)+underset("(Hydrochloric acid)")(16HCl)`
Discussion
22048.

Which of the following is/are true?

Answer»

For the same solution, ELEVATION in boiling point= depression in FREEZING point
van't Hoff FACTOR for a dilute solution of `BaCl_(2)` is 3
Elevation in boiling point is DUE to INCREASE in vapour pressure
Depression in freezing point is due to decrease in vapour pressure.

Answer :B::D
Discussion
22049.

Which of the following will have leasthindered rotation about carbon-carbon bond

Answer»

Ethane
Ethylene
Acetylene
Hexachloroethane

SOLUTION :Ethane `(H_(3)C-CH_(3))` will have the LEAST hindered rotation about C-C bond.
Discussion
22050.

Write down the structure and IUPAC name for neopentyl bromide.

Answer»

Solution :`CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-CH_(2)BR` Common NAME:Neopentyl bromide
IUPAC name: 1-Bromo-2,2-dimethylpropane.
Discussion