Explore topic-wise InterviewSolutions in .

This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.

16251.

When iron nail is placed in CuSO4 solution then....

Answer»

oxidation of Fe is not possible. 
BLUE color of solution BECOME FAINT. 
reduction of `Cu^(2+)` is not possible. 
reduction of `Fe` is possible. 

Answer :B
Discussion
16252.

Which has minimum osmotic pressure

Answer»

200 mL of 2 M NaCl pressure
200 mL of 1 M GLUCOSE solution
200 mL of 2 M urea solution
All have same osmotic pressure

Solution :Osmotic pressure is a colligative property. Particles in NaCl solution `= 2xx2 = 4M` . Particles in glucose solution `= 1xx1 =1M`. Particles in urea solution `= 2xx1=2 M`. LEAST particles are in glucose solution, hence its osmotic pressure is the MINIMUM.
Discussion
16253.

Write the structure of the product expected to be formed when CH_2=CH-overset("*")CH_3(overset("*")C=""^(14)C) is subjected to free radical chlorination.

Answer»

SOLUTION :
Discussion
16254.

Which one of the following statements regarding the population of different conformers butane -2, 3 - diol is true?

Answer»

The most populated CONFORMER with have the hydroxyl GROUPS of the GAUCHE position.
The most populated conformer will have the hydroxyl groups at the anti position.
All staggered conformations will be equally populated.
Relative POPULATIONS of different conformers is not predictable

Answer :A
Discussion
16255.

What is the bond angle in NH_4^+ion ?

Answer»

SOLUTION :`109.5@0`
Discussion
16256.

The relative lowering of vapour pressure of an aqueous solution containing non-volatile solute is 0.0125. The molality of the solution is

Answer»

0.7
0.5
0.6
0.8

Solution :Relative lowering of VAPOUR pressure
= mole fraction of the SOLUTE in the solution,
i.e., `(n_(2))/(n_(1)+n_(2))=0.0125`
Molality `=n_(2)" when "n_(1)=1000/18 " mole"`
= 55.55 mole
`(n_(1)+n_(2))/(n_(2))=(1)/(0.0125)=80or(n_(1))/(n_(2))+1=80`
`"or"(n_(1))/(n_(2))=79 or n_(2)=(n_(1))/(79)=(55.55)/(79)=0.70`
Discussion
16257.

Which of the following cation maybe present in white ppt ?

Answer»

`Pb^(2+)`
`Hg^(2+)`
`AG^(o+)`
`Bi^(3+)`

Answer :a,B,c
Discussion
16258.

What LDP and HDP signify ? How are they prepared ?

Answer»
Discussion
16259.

Thermodynamically, the most stable allotrope of C is

Answer»

DIAMOND
GRAPHITE
anthractice
all of these

SOLUTION :Graphite is thermodymically more STABLE than diamond.
Discussion
16260.

Which of the following undergoes sublimation ?

Answer»

`AlCl_3`
`NH_4Cl`
DRY ice
All of these

Answer :D
Discussion
16261.

Write the structural formual and IUPAC name of the following compunds. (i) Methyl cyanide (ii) Propionitrile (iii) Butyro nirile

Answer»

Solution :(i) `CH_(3)CN""` Ethane nitrile
(II) `CH_(3)-CH_(2)CN""` Propane nitrile
(iii) `CH_(3)-CH_(2)-CH_(2)CN""` Butane nitrile
Discussion
16262.

Vanishing cream and cold cream both are emulsions. Then, what is the difference between the two?

Answer»

Solution :Vanishing CREAM is an emulsion of oil-in-water WHEREAS cold cream is an emulsion of water-in oil. The latter is used for day skin as the base (dispersion MEDIUM) in this cream is oil.
Discussion
16263.

What are non-essential amino acids ? Give two examples.

Answer»

Solution :Out of the 20 amino acids required for PROTEIN synthesis, human body can synthesize only 10. These 10 amino acids which, the body can synthesize are called non-ESSENTIAL amino acids e.g. valine and phenylalanine while the remaining ten which the human body cannot synthesize are called essential amino acids. These essential amino acids are required for the growth of the body and they must be supplied from outside in the human diet, e.g. glycine and CYSTEINE.
Discussion
16264.

What is the unit of rate constant for a second order reaction ?

Answer»

SOLUTION :`MOL^(-1)` LITRE `SEC^(-1)`
Discussion
16265.

When diliute sulphuric acid and hydrogen perioxide are added to a solution of chromate ions, an intense blue colour is produced which is stable in ether. This is due to the formation of :

Answer»

`Cr_(2)O_(3)`
`Cr_(2)O_(7)^(2-)`
`CrO_(3)`
`Cr_(2)O_(5)`

ANSWER :D
Discussion
16266.

Which of the following is a semisyntheticpolymer ?

Answer»

silk
WOOL
Acetate rayon
cotton

ANSWER :C
Discussion
16267.

Which of the following species is not expected to be a ligand?

Answer»

NO
`NH_(4)^(+)`
`NH_(2)CH_(2)CH_(2)NH_(2)`
CO

Solution :`NH_(4)^(+)` doesn't have LONE PAIR
Discussion
16268.

Which of the following amines gives yellow oily liquid with HNO_(2)?

Answer»

Ethyl METHYL AMINE
Aniline
3-methyl benzyl amine
Methyl amine

Solution :Secondary amines , (containing -NH- group) when TREATED with `HNO_(2)` give nitrosamines which separate as yellow OILY liquids. The structures of the given compound are

Among the given compounds , only ethyl methyl amine is a secondary amine , thus it gives a yellow oily liquid with `HNO_(2)`.
Discussion
16269.

Which of the following is a conjugated protein ?

Answer»

PHOSPHOPROTEIN
GLYCOPROTEIN
CHROMOPROTEIN
All of these

ANSWER :D
Discussion
16270.

Which melts in boiling water ?

Answer»

GUN metal
Wood's metal
Monel metal
Bell metal

Answer :B
Discussion
16271.

What volume of ammonia gas at S.T.P. will be required to be passed into 30 mL of 1 N H_(2)SO_(4) solution to bring down the acid normality to 0.2 N?

Answer»

Solution :Normality is the number of milliequivalents (MEQ) per mL
`"meq of 0.2 N "H_(2)SO_(4)" in 30 mL "=30xx0.2=6`
`therefore" meq of "H_(2)SO_(4)" REQUIRED to be beutralized by "NH_(3)=30-6=24`
`"But 1 mole of "NH_(3)="1 g eq, i.e. 1000 meq of "NH_(3)="22400 mL at S.T.P."`
`therefore"24 meq of "NH_(3)=(22400)/(1000)xx"24 mL =537.6 mL"`
Discussion
16272.

Write the IUPAC name ofthe following coordination compound:[Mn(H_2O)_6]^(2+)

Answer»

SOLUTION :Hexa-aqua MANGANESE (II) ION
Discussion
16273.

Which neuro messenger changes the mood of person?

Answer»

Isopronizide 
NORADRENALINE 
PHENELZIN 
LUMINAL 

SOLUTION :Noradrenaline
Discussion
16274.

Which o,f the followingis used to increse pH?

Answer»

Ibuprofen
penicillin
`AI(OH)_(3)`
Veronal

Answer :C
Discussion
16275.

whatvolumeof methane (NTP) is formedfrom16.4g ofsodiumacetanebyfucioonwithsodalime ?

Answer»


Solution :`{:(""CH_(3)COONa),([12+3+12+32+23]),(""82G):} +NaOHunderset("heat")overset(CaO)tounderset(22.4L )(CH_(4))+Na_(2)CO_(3)`
Discussion
16276.

Which is correct about fuel cells :

Answer»

Cells continuously RUN as long as FUELS are supplied
These are more EFFICIENT and free from pollution
These are USED to provide power and drinking WATER to astronauts in space programme
All

Answer :D
Discussion
16277.

Which of the following processes is used for the separation of colloidal particles from particles of molecular dimensions ?

Answer»

DIALYSIS
COAGULATION
PLASMOLYSIS
NONE of these

ANSWER :A
Discussion
16278.

The valency of mercuric ion is:

Answer»

One
Two
Four
All

Answer :B
Discussion
16279.

Which of the following acids doesnot exists in the free form?

Answer»

`H_2SO_2`
`H_2S_2O_3`
`H_2SO_3`
`H_2SO_4`

ANSWER :A
Discussion
16280.

TiO_(2) is well known example of

Answer»

TRICLINIC SYSTEM
Tetragonal system
Monoclinic system
None

Answer :B
Discussion
16281.

When phenol is treated with Conc. HNO_3 and conc. H_2SO_4,the product fornmed is …………………….. .

Answer»

SOLUTION :2, 4, 6 - trinitro phenol (or) PICRIC acid
Discussion
16282.

The volume occupied by 0.25 mol of an ideal gas at S.T.P. is :

Answer»

89.6L
11.2L
5.6L
22.4L

Solution :Volume occupied by 1 MOL of gas at S.T.P. = 22.4 L
Volume occupied by 0.25 mol of gas at S.T.P.
`= 224. XX 0.25 = 5.6 L`
Discussion
16283.

When a crystal of caustic soda is exposed to air, a liquid layer is deposited because:

Answer»

CRYSTAL melts
Crystal LOSS water
Crystal ABSORBS MOISTURE and `CO_2`
Crystal sublimes

Answer :C
Discussion
16284.

What do we obtain when starch is boiled with dilute H_(2)SO_(4) at 393 K under pressure ?

Answer»

SOLUTION :GLUCOSE
Discussion
16285.

Which does not acts as Bronsted acid

Answer»

`HSO_(3)^(-)`
`CH_(3)COO^(-)`
`HCO_(3)^(-)`
`NH_(4)^(+)`

ANSWER :B
Discussion
16286.

Which correctly represents the physical significance of free energy change:

Answer»

`triangleG=W_expansion`
`triangleG=W_nonexpansion`
`triangleG=-W_Compression`
`triangleG=W_compression`

ANSWER :C
Discussion
16287.

Vapour pressure of pure acetone and acetone and chlorofrom at 328 K are 632.8 mm Hg and 741.8 mm Hg respectively. Assuming that they from ideal solution over the entire renge of composition, plot_("Plotal, Pchloroform, and Pcetone") as a function of x_(acetone). The experimental date observed for diffiereant compositin of mixture is:

Answer»

Solution :Form the acailable infrmation:

The NATUE of the based upon the above DATE is as FOLLOWS:

Since the plot or GRAPH dips downward, the solution shows nagative DIVIATION form Raouot's Law.
Discussion
16288.

Which of the following pairs of alcohols are distinguished by oxidation test, Lucas test and haloform test ?

Answer»

METHANOL and ethanol
Ethanol and 3-pentanol
Ethanol and 2-propanol
1-propanol and 3-pentanol

Answer :B
Discussion
16289.

Which of the following compound is trisaccharide ?

Answer»

CELLOBIOSE
RAFFINOSE
Stachyose
Lactose

SOLUTION :Raffinose
Discussion
16290.

Which of the following combination of orbitals is correct

Answer»




SOLUTION :It is a CORRECT COMBINATION
Discussion
16291.

Which of the following chemical species is tetrahedral, diamagnetic as well as coloured ?

Answer»

`CrO_(4)^(2-)`
`MnO_(4)^(2-)`
`[NiCl_(4)]^(2-)`
`[NI(CN)_(4)]^(2-)`

ANSWER :A
Discussion
16292.

Toluene on oxidation with acidified KMnO_(4) gives _______ .

Answer»

BENZOIC acid
salicylic acid
o-toluic acid
anthranilic acid

Answer :A
Discussion
16293.

Which of these do not underg Wurtz reaction

Answer»

`C_(2)H_(5)F`
`C_(2)H_(5)Br`
`C_(2)H_(5)Cl`
`C_(2)H_(5)I`

SOLUTION :`C_(2)H_(5)F+2Na+FC_(2)H_(5) UNDERSET(ether)overset(dry)to`No reaction.
Discussion
16294.

Which of the following represents the correct order?

Answer»

STABILITY : `overset+CH_3 lt CH_3 - overset+CH_2 lt CH_3 - overset+CHCH_3 lt (CH_3)_3overset+C`
Stability : `dotCH_3 lt CH_3-dotCH_2 lt CH_3 - DOT CH-CH_3 lt (CH_3)_3dotC`
Hyperconjugation : `CH_3 - lt CH_3 - CH_2- lt (CH_3)_2CH - lt (CH_3)_3C-`
Basic NATURE: `barCH_3 GT barNH_2 gt barOH gt barF`

ANSWER :A::B::C::D
Discussion
16295.

Write the names of the monomers of the following polymers: [CF_2 - CF_2 ]_n

Answer»

SOLUTION :TETRAFLUOROETHENE `(CF_2=CF_2)`
Discussion
16296.

Which of the following compound(s) decolourises Bromine water and also gives positive test with neutral FeCl_(3) solution?

Answer»

`CH_(2)=CH-OH`<BR>`CH_(2)=CH-CH_(2)OH`
`CH_(3)-CH=CH-OH`

Solution :`-CH_(2) = CH - OH` groups decolourise `Br_(2)` water. No reaction with NEUTRAL `FeCl_(3)`
Discussion
16297.

Write IUPAC names of the following componds : (i) CH_(3)- underset(CH_(3))underset(|)overset(Cl)overset(|)C-CH_(3)"" (ii) CH_(3)- underset(Cl)underset(|)CH-CH_(3)

Answer»

SOLUTION :(1) 2-chloro-2-methylpropane.
(II) 2-chloropropane.
Discussion
16298.

Zr and Hf have almost equal atomic size because….

Answer»

Of CHARACTERISTIC configuration
Of LANTHANOID contraction
Lattice enthalpy is high
Of ACTINOID contraction

Answer :B
Discussion
16299.

Which transiton element shows the highest oxidation state:

Answer»

Fe
Mn
V
Cr

Answer :B
Discussion
16300.

Which of the following is not an antipyretic?

Answer»

PARACETAMOL
Aspirin
Chloramphenicol
Phenacetin.

ANSWER :C
Discussion