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10951.

The vapour pressure above a solution of 50g acetic acid (H_(2)H_(3)O_(2)~ in 100.0g H_(2)O (P_(H_(2)O^(0)=23.756 Torr at 25^(0)C) was 23.40 Torr and in 100.0g C_(6)H_(6) (P_(C_(6)H_(6)^(0)=72.5 Torr at 25^(0)C) was 70.0 Torr. Assuming HC_(2)H_(3)O_(2) to be non-volatile, use these date to discus the intermolecular bonding in HC_(2)H_(3)O_(2)~.

Answer»


SOLUTION :N//A
Discussion
10952.

Urea on treatment with sodium hypobromite gives:

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sodium CARBONATE
nitrogen
`CO_(2) and H_(2)O`
all of these

ANSWER :D
Discussion
10953.

When benzenediazonium hydrogen sulphate is warmed with methanol, the product formed is

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benzene
benzenol
benzyl alcohol
anisole

Answer :D
Discussion
10954.

Which of the following is a correct combination for a lyophobic colloid in column 1.

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(II)(iii)(Q)
(I)(iii)(R)
(IV)(i)(S)
(IV)(iv(Q)

SOLUTION :NA
Discussion
10955.

To 100 ml of a 0.5 M solution, 400 ml of water is added, the final molarity would be

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0.125
0.1
0.25
0.15

Solution :`M_(1) V_(1) = M_(2) V_(2)`
`M_(2)= (M_(1) V_(1))/V_(2)=(0.5 xx 100)/500 =0.1 M `
Discussion
10956.

What are actinoides? Give three examples.

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Solution :(i) The fourteen elements following actinium ,i.e., from thorium (Th) to lawrentium (Lr) are called actinoids.
(ii) All the actinoids are radioactive and most of them have short half LIVES.
(III) The heavier members being extremely unstable and not of natural occurrence. They are produced synthetically by the artificial transformation of NATURALLY occuring elements by nuclear reactions.
(iv) Example: Thorium, Uranium, Plutonium, CALIFORNIUM.
Discussion
10957.

underset((A))(C_(12)H_(16))overset("i) "O_(3)"ii) "Zn,H_(2)O_(2))rarr 2H_(3)C-overset(O)overset(||)C-CH_(3)+2HOOC+overset(O)overset(||)C-COOH What is degree of unsaturation of compound A?

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ANSWER :5
Discussion
10958.

Which of the following statements is correct for a reversible process in a state of equilibrium

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`DELTAG=2.30RTlog K`
`DeltaG^(@)=-2.30RTlog K`
`DeltaG^(@)=2.30RTlog K`
`DeltaG=-2.30RTlog K`

SOLUTION :`DeltaG^(@)=-2303RT LOG K`
Discussion
10959.

Which of the following isotopes is present in largest amount :

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`O^16`
`O^17`
`O^18`
All in EQUAL amounts

Answer :A
Discussion
10960.

Which of the following is a step- growth polymer ?

Answer»

Polyacrylonitrile
POLYISOPRENE
NYLON
Polythene.

ANSWER :C
Discussion
10961.

which of the following is not the correct matches according to VESPER theory

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`ICl_2`LINEAR ion
`ICl_4^-`Square planer ion
`IF_5`SEA -saw
`SO_2`Bent

Answer :C
Discussion
10962.

The volume of 0.1 M oxalic acid that can be completely oxidized by 20 mL of 0.025 M KMnO_4 solution is

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125mL
25mL
12.5mL
37.5 mL

Solution :`5H_2C_2O_4 + 2KMnO_4 + 3H_2SO_4 to 2MnSO_4 + K_2SO_4 + 10CO_2 + 8H_2O`
According to molarity EQUATION
` ( (M_1V_1)/(n_1) )_(KMnO_4) = ( (M_2V_2)/(n_2) )_("OXALIC ACID")`
or` (0.025 xx 20)/(2) = (0.1 xx V_2)/(5) `
`V_2 = (5 xx 0.025 xx 20)/(2 xx 0.1)`
`= 12.5 mL`
Discussion
10963.

which one of the following is not an element?

Answer»

Diamond
Ozone
SILICA
GRAPHITE.

ANSWER :C
Discussion
10964.

Which one of the following on heating will not give CO_(2)

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`CaCO_(3)`
`Na_(2)CO_(3)`
`PbCO_(3)`
`Li_(2)CO_(3)`

ANSWER :B
Discussion
10965.

Which of the following compound has the highest boiling point

Answer»

HCl
HBr
`H_(2)SO_(4)`
`HNO_(3)`

Answer :C
Discussion
10966.

Total number of ketones with molecular formula C_5 H_(10) O including stereiosomers is

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SOLUTION :`C_5 H_(10)O , CH_3-UNDERSET(O ) underset(||)C -CH_2 -cH_2 -cH_3 ,CH_3 ,CH_3 - OVERSET(O )overset(||)C-underset(CH_3) underset(|) CH-CH_3, CH_3 -CH_2 - overset(O) overset(||)C-CH_2 -CH_3`
Discussion
10967.

Vanishing cream is an example of ……….in……….type of emulsion whereas cold cream is an example of ……….in……….type of emulsion.

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SOLUTION :oil-in-wate, water-in-oil
Discussion
10968.

Which of the following has highest nucleophilicity ?

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`F^(-)`
`OH^(-)`
`CH_(3)^(-)`
`NH_(2)^(-)`

ANSWER :C
Discussion
10969.

Which of the following reaction will be useful for conversion of P_(3) " into " P_(4)?

Answer»

Clemmenson's REDUCTION Oppenauer oxidation
Meerwin pondorff Verely reduction
Tischenko reaction

Solution :
Discussion
10970.

What is the amount of electricity required for the reduction of one mole of silver ions ?

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SOLUTION :1 FARADAY
Discussion
10971.

What is the complete charging reaction of Ni-Cd storage cell ?

Answer»

`Cd_((S))+2Ni(OH)_(4(S)) toCdO_(2(S))+2Ni(OH)_(2)+2H_(2)O_((l))`
`CdO_((S))+NI(OH)_(2(S))+H_(2)O_((l)) to Cd_((S))+2Ni(OH)_(3(S))`
`Cd_((S))+2Ni(OH)_(3(S)) to CdO_((S)) +Ni(OH)_(2(S))+H_(2)O_((l))`
`CdO_(2(S))+2Ni(OH)_(2)+2H_(2)O_((l)) to Cd_((S))+2Ni(OH)_(4(S))`

Solution :`CdO_((S))+Ni(OH)_(2(S))+H_(2)O_((l)) to Cd_((S))+2Ni(OH)_(3(S))`
Discussion
10972.

Which of the following is not a derivative of carboxylic acids ?

Answer»

ACYL CHLORIDE
ALKANAMIDE
ALKYL alkanoate
Alkanals

ANSWER :D
Discussion
10973.

Which one of the followings is employed in making explosives:

Answer»

Methanol
Oxalic acid
Glycerol
Urea

Answer :C
Discussion
10974.

Which of the following is an example of Stephen reaction?

Answer»

`RCN overset(1.AlH(i-Bu)_(2))underset(2.H_(2)O)RARR R-CHO`
`CH_(3)(CH_(2))_(9)-overset(O)overset(||)C-OC_(2)H_(5)overset("1. DIBAL - H")underset(2.H_(2)O)rarr CH_(3)(CH_(2))_(9)-overset(O)overset(||)C-H`
`R-CN+SnCl_(2)+HCl rarr RCN=Nhoverset(H_(3)O^(+))rarr RCHO`

Solution :Reduction of alkyl cyanide USING `SnCl_(2)` and HCl is called as Stephen reduction reaction.
Discussion
10975.

Which is/are correct statements ?

Answer»

1 L of `1N H_(3) PO_(4)` solution contains one-third of molecular weight when it is completely neutralized by NaOH
1 L of `NH_(3)PO_(4)` solution constains 1 mole of `H_(3)PO_(4)` when it is reduced to `HPO_(3)^(2-)`
1 L of `N H_(2)PO_(3)` solution contains 0.5 mol of `H_(3)PO_(4)` when it is reduced to `PJO_(3)^(2-)`
`H_(3)PO_(4)` is a monobasic acid

Answer :A::C
Discussion
10976.

When sodium bicarbonate is heated strongly for calcined in a kiln, it forms,

Answer»

Na
`Na_(2)CO_(3)`
`NaCO_(3)`
`NaHCO_(3)`

Answer :B
Discussion
10977.

Which type of strain is present in fully eclipsed conformation of butane ?

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ANGLE strain
Steric strain
BOTH (A) AND (B)
NEITHER (A) nor (B)

ANSWER :C
Discussion
10978.

Which has the maximum electropositive character ?

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Mg
Al
Be
S

Answer :A
Discussion
10979.

What products would be formed when a nucleotide from DNA containing thymine is hydrolysed?

Answer»

SOLUTION :THYMINE, 2-deoxy-D-ribose and PHOSPHORIC ACID.
Discussion
10980.

Which values can be obtained from the information represented by the vapour pressure curve of a liquidlt/brgt A. Normal boiling pointlt/brgtB. Normal freezing point lt/brgtC. Enthalpy of vaporization

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A only
A and B only
A and C only
A, B and C

Answer :C
Discussion
10981.

Which of the following statement(s) is/are correct forthe reaction given below?

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It is an EXAMPLE of ALDOL CONDENSATION
X=HCHO, Y=Acetal
X=`CH_3CHO` , Y=3-Hydroxy-3-phenyl propanaldehyde
It is Claisen-Schmidt condensation.

Answer :A::C
Discussion
10982.

The shapeof a molecule which has 3 bond pairs and one long pair is:

Answer»

OCTAHEDRAL
Pyramidal
Triangular planar
Tetrahedral

Answer :B
Discussion
10983.

Which is incorrect as the uses of limestone in industries are concerned?

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For MAKING cement
In the EXTRACTION of Snfrom its ore
In the extraction of FE from its ore
In the MANUFACTURE of gass

Answer :B
Discussion
10984.

Which part of -COOH group is involved in the reaction of acid with metals :

Answer»

Only H atom
Only -OH PART
BOTH (A) AND (B)
None

Answer :A
Discussion
10985.

The relation a!=b!=c and alpha!=beta!=gamma!=90^(@) represents which crystal system ?

Answer»

Orthorhombic
Tetragonal
Triclinic
Monoclinic

Answer :C
Discussion
10986.

Which of the following compounds will be most readily dehydrated ?

Answer»

`HOCH_2CH_2COCH_2CH_3`
`HOCH_2CH_2CH_2COCH_3`
`HOCH_2COCH_2CH_2CH_3`
`HOCH_2CH_2CH_2CH_2CHO`

SOLUTION :`beta` - HYDROXY carbonyl COMPOUNDS undergo dehydration more READILY
Discussion
10987.

Which of the following statements is correct regarding order of reaction

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FIRST ORDER reaction should be bimolecular
Order of the reaction must be positive
order DEPENDS upon stoichiometry
order is DETERMINED by experimental results

Answer :D
Discussion
10988.

Which match is inccorect ?

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Ammonia soda PROCESS - manufacture of POTASSIUM carbonate
Bessemer.s process - manufacture of STEEL
Mac arther and forrest process - EXTRACTION of silver
Dow.s procees -manufacture of phenol

Answer :A
Discussion
10989.

underset("(aq solu)")(Bbar(b))+Cl_(2) rarr underset("[Separated solution by passing air]")(Br_(2) + 2 bar(C ) I) The salt (A) & ( B ) respectively are

Answer»

NaBr, `NaBrO_(3)`
`NaOBr_(3), NaOBr_(2)`
`NaOBr, NaBr`
`NaBr, NaOBr_(2)`

Solution :`3Na_(2)CO_(3) + 3Br_(2) rarr UNDERSET("(A)")(5NaBr)+ underset("(B)")(NaBrO_(3))+ 3CO_(2)`
Discussion
10990.

Which of fhe following is stble in cold and unsable at high temperature

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Saccharin
Aspertame
Alitame
Sucrulose

Answer :B
Discussion
10991.

The vitamin which is neither soluble in water nor in fats is

Answer»

Vit-A
Vit-H
Vit-P
Vit-D

Answer :B
Discussion
10992.

What is producer ga? How will you prepare producer gas?

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Solution :Onindustrial scale carbon MONOXIDE is PRODUCED by the reaction of carbon with air. The carbon monoxide formed will contain nitrogen GAS also and the MIXTURE of nitrogen and carbon monoxide is called PRODUCER gas.
`2C+O_(2)//N_(2)("air")tounderset(("Producer gas"))(2CO+N_(2))`
Discussion
10993.

When KCl dissolves in water ( assume endothermic dissolution):

Answer»

`DELTAH=+"ve",DELTAS=+"ve",DELTAG=+"ve"`
`DeltaH=+"ve",DeltaS=-"ve",DeltaG=-"ve"`
`DeltaH=+"ve",DeltaS=+"ve",DeltaG=-"ve"`
`DeltaH=-"ve",DeltaS=-"ve",DeltaG=+"ve"`

ANSWER :C
Discussion
10994.

Which of the following is not a target molecule for drug function in body?

Answer»

Carbohydrates
Lipids
VITAMINS
Proteins

Solution :Vitamins are not TARGET molecules for DRUG function in body.
Discussion
10995.

What is A in the reaction given below ? A + NaOH to CHCl_(3) + HCOONa + H_(2)O

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Chloroform
Chloral hydrate
Chloral
Carbon tetrachloride

Solution :`underset("chloral hydrate")(C Cl_(3)CH(OH)_(2)) + NAOH to underset("chloroform")(CHCl_(3)) + underset("SODIUM phormate")(HCOONa + H_(2)O)`
Discussion
10996.

Which of the following statement are correct?

Answer»

In gas phase, the basic CHARACTER of amine is `3^(@)gt2^(@)gt1^(@)`, Due to the `+I` effect `(R-)`, the availability of `LP overset(bar)e's` pm `N` INCREASES.
Inaqueous medium, the basic characterofamines is `Me_(2)NH gt ME_(3)N gt MeNH_(2) gt NH_(3)`.
In aqueoys medium, the ADDITION of protons increases of crowding and thus STRAINS setup, which being the highest in `3^(@)` amine decreases its basic character.
In aqueous medium, the ammonium ions in solution are stabilised not onlyby alkyl groups but also by `H`-bond donation to the solvent.

Solution :The order is `Me_2 NH gt MeNH _2 gt Me_3 N gt NH_3 (2^@ gt 1^@ gt 3^@ gt NH_3)` Sttemetns (a) , (c ) and (d) are correct.
Discussion
10997.

Why are transition elements known as d-block elements?

Answer»

SOLUTION :Transition elements are KNOWN as d-block elements because the LAST electron in them enter the (n-1) d-orbital, i.e., d-orbital of the penultimate shell.
Discussion
10998.

Which of the following alcohols is most likely to yield the carboxylic acid

Answer»

PROPAN -2-ol
Butan-1-ol
2-methylpropan -1-ol
2-methylpropam -2-ol

Answer :C
Discussion
10999.

When 1,3-butadiene reacts with HBr, how many products are formed (including stereo isomers)?

Answer»


SOLUTION :
Discussion
11000.

Which of the following is zero during reversible adiabatic expansion of the gas

Answer»

`DELTA T`
`Delta S`
`Delta E`
All have ZERO VALUE

ANSWER :B
Discussion