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.

8851.

Which of the following reagents can be used to convert benzenediazonium chloride to benzene ?

Answer»

`SnCl_(2)//HCL`
`CH_(3)-CH_(2)-OH`
`H_(2)O`
`H_(3)PO_(2)`

SOLUTION :
Discussion
8852.

Which of the following pathways produces 2- pentanone (1) pent-1- yne is treated with H_(2) SO_(4) + HgSO_(4)andwater (2)3- methylhex -2- ene is treated with O_(3) followed by hydrolysis (3) n- butyl megnesium halide is reacted with formaldehyde (4) hydroboration oxidation of pent -1- ene

Answer»

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

ANSWER :B
Discussion
8853.

which of the followingstatements about lanthanides is incorrect ?

Answer»

All lanthaide are highlydense metals.
More characteristic oxidation state of lanthanides is +3.
Lanthanides are SEPARATED from one anotherby ion exchange METHOD.
Ionic radii of TRIVALENT lanthanides steadily increase with increase in atomic NUMBER.

Answer :D
Discussion
8854.

Which of the following forms cationic micellus

Answer»

SOD - stearate
Urea
Cetyl trimethyl ammonium bromide
Sod. dodecyl sulphate

ANSWER :C
Discussion
8855.

What is natural rubber ?

Answer»

cis -1 4-polyuisoprene
Trans-1,-4 -POLYISOPRENE
neoprene
BUTYL rubber

ANSWER :A
Discussion
8856.

Which of the following statement are correct :

Answer»

All the three forms of GLUCOSE are interconvertible in aqueous solution
Amount of all the three forms of glucose are same in aqueous solution
Interconversion of one FORM into other TWO forms are not the CAUSE of mutarotation.
`alpha`-glucose is more stable than `beta`-glucose

Answer :C
Discussion
8857.

Which of the following complexes will give a pair of enantiomers ?

Answer»

`[Pt(NH_(3))_(4)][PtCl_(6)]`
`[CO(NH_(4))Cl_(2)]NO_(2)`
`[CR(NH_(3))_(6)]Co(CN)_(6)]`
`[Co(en)_(2)Cl_(2)]Cl`

Solution :It is the CORRECT answer.
Discussion
8858.

Which one among the following in the strongest Bronsted base.

Answer»

`CIO_(4)^(-)`
`CIO_(3)^(-)`
`CIO_(2)^(-)`
`CIO^-`

ANSWER :D
Discussion
8859.

Which of the following is an antidiabetic drug

Answer»

INSULIN
Chloroquine
Penicillin
Aspirin

Solution :Insulin is an ANTIDIABETIC DRUG.
Discussion
8860.

Which of the following is not an aminium salt ?

Answer»

`CH_3 CH_2 overset(o+)NH_3 CL^(Ѳ)`
`(CH_3 CH_2)_2 overset(o+)NH_2 Br^(Ѳ)`
`(CH_3)_3 overset(o+)Nhoverset(Ѳ)I`
`(CH_3)_4 overset(o+)NBR^(Ѳ)`

Answer :D
Discussion
8861.

The typical reaction of benzene and other aromatic compounds are electrophilic substitution. Presence of electron donating group activates the ring towards electrophilic substitution, while presence of electron withdrawing group deactivates the ring towards electrophilic substituion but at the same time activates the ring towards nucleophilic subsituion. Some groups are predominantly meta-directing and all of these are deactivating. Except halogen, most of the o-andp-directing groups are activating groups. Which of the following compound is not formed. underset((II)Br_(2)//FeBr_(3))overset((i)NBS,C Cl_(4),hv)rarr(X) X represents mixture of organic compounds. The mixture does not contain

Answer»




all of them

Solution :N//A
Discussion
8862.

Which of the following metal is not manufactured by electrolysis

Answer»

NA
MG
AL
FE

ANSWER :D
Discussion
8863.

Which one is most important in fertilizer production?

Answer»

`NH_3`
`H_3PO_4`
`(NH_4)_2SO_4`
`CO(NH_2)_2`

ANSWER :A
Discussion
8864.

Which of the following transition elements is not resistant to corrision ?

Answer»

CO
FE
Ni
All

Answer :B
Discussion
8865.

Thermal pollution of water bodies is due to

Answer»

Discharge of heat (hot water) from power plants
Discharge of CHEMICALS from industries
Discharge of waste from mining
Discharges of agricultural RUN off

Solution :Due to nuclear and other conventional sources , temperature of water bodies and ATMOSPHERE INCREASES, which has adverse effect on different organisms.
Discussion
8866.

Which of the following compounds undergo nucleophilic substitution reaction most easily?

Answer»




Solution :PRESENCE of electron-withdrawing groups (i.e., `NO_(2),CN`, etc.) at o- and p-position w.r.t. Cl ACTIVATES it towards nucleophilic substitution reactions while presence of electron-donating groups (i.e., `CH_(3),OCH_(3)`, etc.) deactivates it towards nucleophilic substitution reaction. thus, p-nitrochlorobenzene UNDERGOES nucleophilic substitution reaction most easily. thus, option (a) is correct.
Discussion
8867.

Which alcohol does not give stable compound on dehydration ?

Answer»

METHYL ALCOHOL
Ethyl alcohol
Propyl alcohol
n-Butyl alcohol

Solution :Methyl alcohol
Discussion
8868.

Which of the following give ammonia with water

Answer»

`Mg_(3)N_2`
AIN
`CaCN_(2)`
all

Solution :(a) `Mg_(3)N_(2) +6H_(2)Orarr 3Mg(OH)_2+2ul(NH_3)`
(b) `AIN + 3H_(2)O rarr Al(OH)_3+ul(NH)_3`
(C) `CaNCN+ 3H_(2) OrarrCa(OH)_2 +CO_2+2ul(NH)_3`
Discussion
8869.

Which of the following reactions is an example of nucleophilic substitution reaction?

Answer»

`2RX+NararrR-R+2NaX`
`RX+H_(2)rarrRH+HX`
`RX+MgrarrRMgX`
`RX+KOHrarrROH+KX`

ANSWER :D
Discussion
8870.

What is the action of Cl_(2) on the following: hot and concentrated NaOH.

Answer»

Solution :`3Cl_(2)+6NaOH_("CONC") overset("hot")to 5NaCl+NaClO_(3)+3H_(2)O`
Discussion
8871.

What is the normality of 0.04 M H_(2)SO_(4) ?

Answer»

0.04 N
0.012 N
0.08 N
0.02 N

SOLUTION :MOLARITY `= ("NORMALITY"xx"equivalent WEIGHT")/("Molecular weight")`
`0.04=("Normality"xx49)/(98)`
`therefore` Normality = 0.08 N
Discussion
8872.

The solutions which are isotonic with 6 % (w/V) solution of urea are

Answer»

18 % (w/V) solution of glucose
0.5 M solutions of `BaCl_(2)`
1 M solution of socrose
1 M solution of acetic acid.

Solution :`(a,C) ` OSMOTIC pressure, `pi = CRT`
`C_(("urea"))= 6 g// 100 ML RARR 60g//L, pi_(("urea")) = (60)/(60)RT = RT`
(a) `C_(("glucose")) = 18 g// 100 mL rArr 180 g//L`
`pi _(("glucose")) = (180)/(180) RT = RT`
(b) `pi_(BaCl_2) = 3 XX 0.5 RT = 1.5 RT (i=3)`
`pi_("surose") = 1RT=RT`
(d) `pi_("acetic acid") = 2 xx1 xx RT =2 RT =2 RT (i =2)`
Discussion
8873.

Triethylamine is reacted with a peracid to obtain X. The nitrogen atom in X has formal charge

Answer»

0
`+1`
`-1`
`+2`

ANSWER :B
Discussion
8874.

What happens when a colloidal sol of As_2S_3and Fe(OH)_3are mixed?

Answer»

Solution :When `As_2 S_3` and `Fe(OH)_3`sols are MIXED, coagulation occurs. Since `Fe(OH)_3`is POSITIVELY CHARGED and `As_2S_3`is negatively charged, their charges are NEUTRALISED when mixed and PRECIPITATION occurs.
Discussion
8875.

Which one of the following possess highest m.pt.

Answer»

Chlorobenzene
o-dichlorobenzene
m-dichlorobenzene
p-dichlorobenzene

Solution :p-dichlorobenzenne MOLECULE has SYMMETRICAL STRUCTURE. It can FIT well in its crystal lattice. The intermolecular forces of attraction are strong. Hence, it possess highest melting point.
Discussion
8876.

Which monomer is present in Teflon polymer ?

Answer»

Monofluoroethene
Difluoroethene
Trifluoroethene
TETRAFLUOROETHENE

SOLUTION :Tetrafluoroethene
Discussion
8877.

The term hypnone is used for:

Answer»

Benzophenone
Acetophenone
Acetaldehyde
None

Answer :B
Discussion
8878.

Write the difference in the size of sterate anion and stearate micelle.

Answer»

Solution :STEARATE ANION is a normal ion. Its size is in the ORDER of `10^(-10)`m. Stearate micelle is formed by the aggregation of fewhundreds of stearate anions leading to an ASSOCIATED colloid . The size of ANIONIC micele formed is in the order of `10^(-8)`m.
Discussion
8879.

Which of the following species show maximum stability :-

Answer»

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

ANSWER :A
Discussion
8880.

Write Sandmeyer reaction.

Answer»

SOLUTION :
Discussion
8881.

Which give a whiteprecipitate with a solution of AgNO_(3) is white precipitate with dil H_(2)SO_(4) and a green flame test ?

Answer»

Copper chloride
Copper nitrate
Leadnitrate
Barium chloride

Solution :Ba gives GREEN flame `AGCI` and `BaSO_(4)` are white ppt FORMED RESPECTIVELY
Discussion
8882.

Which of the following is an antihistamine drug?

Answer»

Ciprofloxacin
Chlorpheniramine maleate
Chloroquine
Chloramphenicol.

ANSWER :B
Discussion
8883.

What causes Brownian movement in a colloidal solution?

Answer»

SOLUTION :It is due to the unbalanced bombardment of molecules of dispersed PHASE by molecules of dispersion MEDIUM.
Discussion
8884.

Which is the most stable oxidation state among lanthanoids ?

Answer»

SOLUTION :`+3` is the most STABLE OXIDATION STATE.
Discussion
8885.

When MnO_(2) is fused with KOH , a coloured compound is formed . The product and its colour is :

Answer»

`KMnO_(4)`, PURPLE
`Mn_(2) O_3` , brown
`K_(2) MnO_(4)` , purple green
`Mn_(2) O_(4)` , BLACK

Answer :C
Discussion
8886.

Which of the following is a molecular disease?

Answer»

Allergy
Cancer
GERMAN measles
Sickel cell anaemia

SOLUTION :Sickle cell anaemia, caused by replacement of glutamic acid by valine in the molecule of the protein called HAEMOGLOBIN, is a molecular DISEASE
Discussion
8887.

When a white crystalline compound X is heated with K_(2)Cr_(2)O_(7) and concentrated H_(2)SO_(4), a reddish brown gas A is evolved. On passing A into caustic. Neutralising the solution of B with acetic acid and on subsequentaddition of lead acetate a yellow precipiate C is obtained. When X is heated with NaOH solution, colourless gas is evolved and on passing this gas into K_(2)HgI_(4) solution, a reddish brown precipitate D is formed. Identify a, B, C, D and X. Write the equation of reaction involved.

Answer»
Discussion
8888.

What is the decreasing order of strength of bases? OH^-, NH_2^-, H-C-=C and CH_3-H_2

Answer»

`OH^(-)gtNH_(2)^(-)gtH-C-=CH_3-CH_2 `
`NH_(2)^(-) gt OH^(-) gt CH_3 -CH_2^(-) gt H-C-=C`
`CH_3-CH_(2) gt NH_2^(-) gt H-C-=C^(-) gt OH^(-)`
`OH^(-) gt H-C-=C^(-) gt CH-CH_2^(-) gt NH_2^(-)`

ANSWER :C
Discussion
8889.

What is meant by blood sugar?

Answer»

Solution :Human BLOOD CONTAINS about 100 MG/ DL of glucose, hence it is also known as blood sugar.
Discussion
8890.

varphi^2=0 represents

Answer»

a node
an orbital
angular WAVE FUNCTION
wave function

Answer :A
Discussion
8891.

Which of thefollowing option is incorrect regarding following process : underset("(impure)")M+Co overset(Delta) to Product (X) overset(Delta) to underset("(pure)")M+CO

Answer»

X is a high spin complex
It is MOND's process
X is TETRAHEDRAL in shape
X is diamagnetic in nature

Solution :`X to [Ni(CO)_(4)]
SP^(3), " diamagnetic", " tetrahedral "`
Discussion
8892.

What should be the rate of disappearance of B ?

Answer»

SOLUTION : RATE of DISAPPEARANCE of A = Rate of disappearance of B`= 10^(-2)` MOLE/ litre/second
Rate of disappearance of A= `1/2xx` Rate of formation of C
Discussion
8893.

Which of the following compounds will not give iodoform test:

Answer»

SOLUTION :butane1-al
Discussion
8894.

Which one of the following is the correct statement

Answer»

Archiral molecules are superimposable
Alanine is optically inactive amino acid
Glycine is optically ACTIVE amino acid
Racemic lactic acid is optically active

Solution :Achiral molecules are superimposable.
Racemic mixtures are optically inactive due to EXTERNAL compensation.
If during a reaction, no bond to the STEREO centre is broken, the product will have the same general configuration of atoms or GROUP i.e., retention of configuration as

Even though sign of optical ROTATION has changed but configuration is retended.
Discussion
8895.

What modification can you suggest in the Hardy-Schulze law ?

Answer»

Solution :Schulze and Hardy showed that the greater the flexibility of the ureter ion, the greater is the ability to interfere. This rule takes in to account the charge of ion on volume. Their SIZE has not been taken into CONSIDERATION.
The size of the ion is as small, as well as its ability to polarize. Thus the rule of Schulze and Hardy can be improved as FOLLOWS :
"The amount of POLARIZATION as the added ureter is equal to the amount of polarity EMITTED..
Discussion
8896.

Which of the following biphenyl is optical active:

Answer»




NONE

ANSWER :B
Discussion
8897.

Which is a coinage metal :

Answer»

Zinc
Tin
Lead
Copper

ANSWER :D
Discussion
8898.

What'is X?

Answer»

`CH_(3)COOH`
`BrCH_(2),COOH`
`(CH_(3)CO)_(2)O`
`CHO-COOH`

ANSWER :C::D
Discussion
8899.

Which of the following statement is not true?

Answer»

Gases do not FORM colloidal solution .
SOL. Of egg albumin can be prepared by simply stirring the albumin with water.
Aluminium hydroxide sol is hydrophobic and irreversible COLLOID
FERRIC hydroxide sol can be prepared by DISSOLVING it in hot water .

Answer :D
Discussion
8900.

Write the formulae for the following coordination compounds:(a) tetraammineaquachloridocobalt(III) chloride (b) potassium tetrahydroxozincate (II) (c) potassium trioxalatoaluminate (III) (d) dichlorido bis(ethane - 1, 2 - diamine) cobalt (III) ion(e) tetracarbonyl nickel (0).

Answer»

Solution :`[CO(NH_(3))_(4)(H_(2)O)CI]CI_(2)`
`K_(2)[ZN(OH)_(4)]`
`K_(3)[AI(C_(2)O_(4))^(3 )]`
`[COCI_(2)(EN)_(2)(en)_(2)]^(+)`
[NI(CO)_(4)]`
Discussion