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.

12501.

What are the uses of Benzaldehyde?

Answer»

Solution :(i) as a flavoring AGENT
(ii) in perfumes
(iii) in dye intermediates
(iv) as STARTING material for the synthesis of several other ORGANIC compounds like CINNAMALDEHYDE, cinnamic acid, benzoyl chloride etc.
Discussion
12502.

The solubility of Al(OH)_3 is 's' mol per litre, the solubility product of Al(OH)_3 is :

Answer»

`s^3`
`27s^4`
`s^2`
`4s^2`

ANSWER :B
Discussion
12503.

Which of the following mixture is chromic acid?

Answer»

`K_2Cr_2O_7` and CONC.`H_2SO_4`
`K_2Cr_2O_7` and HCL
`K_2SO_3` and conc. `H_2SO_4`
`H_2SO_4` and HCl

Solution :`K_2Cr_2O_7 + H_2SO_4`
Discussion
12504.

Which of the following reactions does not yield an alkyl halide

Answer»

Diethyl ETHER+`CI_(2)`
Diethyl ether + HI
Diethyl ether + `PCI_(5)`
Diethyl ehter +RCOCI

Solution :NA
Discussion
12505.

The strength of bonds formed by overlapping of 2s-2s, 2p-2p and 2p-2s follows the order

Answer»

`2s-2s GT 2p-2p gt 2s-2p`
`2s-2sgt 2p-2s gt 2p-2p`
`2p-2pgt2s-2pgt 2s-2s`
`2p-2p gt 2s-2s gt 2p-2s`

ANSWER :C
Discussion
12506.

Vitamin C deficiency may cause:

Answer»

Beriberi
Rickets
Night blindness
Teeth & SCURVY disease

Answer :D
Discussion
12507.

What can be inferred from the magnetic moment of the followingcomplex species ? {:("Example ","Magnetic moment(BM)"),([K_(4)[Mn(CN)]_(6)],2.2),([Fe(H_(2)O)_(6)]^(2+),5.3),(K_(2)[MnCl_(4)],5.9):}

Answer»

Solution :Magnetic moment `(mu) = sqrt(n(n+2))BM`
When `n= 1 , mu = sqrt(1(1+1)) = sqrt(3) = 1.73`
When `n=2, mu = sqrt(2(2+2))= sqrt(8) = 2.83`
When `n = 3 , mu = sqrt( 3( 3+2)) = sqrt(15) = 3.87`
When `n=4 , mu = sqrt( 4( 4+2)) = sqrt( 32) = 5.66`,
When `n = 5 , mu= sqrt( 5 ( 5+2)) = sqrt( 35) 5.92`
(i) `K_(4)[Mn(CN)_(6)]`. In this complex, Mn is in `+2` oxidation state, i.e., as `Mn^(2+)`. `mu = 2.2` BM shows that it has only on unpaired ELECTRON. Thus, when `CN^(-)` ligands approach `Mn^(2+)` ion, the electron in 3d pairup as shown in Figure.
Thus, `CN^(-)` is a strong ligand.
The hybridisation involved is `d^(2) SP^(3)` forming inner orbital octahedral complex.
(ii) `[Fe(H_(2)O)_(6) ]^(2+)`. In this complex, Fe is in `+2` state, i.e., as `Fe^(2+)`.
`mu = 5.3` BM shows that there are four unpaired electrons. This means that the electrons in 3d do not pair up when the ligands, `H_(2)O` molecules, approach. Thus, `H_(2)O` is a weak ligand. To accomodate the electrons donated by six `H_(2)O` molecule, the hybridisation will be `sp^(3) d^(2)`. Hence, it will be an outer orbital octahedral complex .
(iii) `K_(2)[MnCl_(4)]` . In this complex, Mn is in `+2` state, i.e., as `Mn^(2+), mu = 5.92` BM shows that there are five unpaired electrons. Thus, the hybridisation involved will be`sp^(3)` and the complex will be tetrahedral.

Discussion
12508.

Three solution are prepared by adding "wg" of "A" into 1kg of water , 'w' g of B into 1kg of water and 'w' g of c into 1kg of water (A, B, C, are non electrolytic). Dry air is passed from these solutions in sequence (A rarr B rarr C) . The loss in weight of A was found to be 2gm while solution B gained 00.5 gm and solution C lost 1gm then the relation molar masses of A, B and C is :

Answer»

`M_(A):M_(B):M_(C)=1:2:3`
`P_(SA):P_(SB):P_(SC)=5:3:1`
`M_(A) GT M_(A) gt M_(C)`
`M_(B) gt M_(A) gt M_(C)`

ANSWER :D
Discussion
12509.

Vapour presure of pure water at 298 K is 23.8 mm Hg. 50 g of urea (NH_(2)CONH_(2)) is dissolved in 850 g of water. Calculate the vapour pressure of water for this solution and its relative lowering.

Answer»

Solution :It is given that vapour pressure of water,
`p_(A)^(0)=23.8` mm of Hg
Weight of water taken, `w_(1)=850 g`
Weight of urea taken, `w_(2)=50 g`
Molecular weight of water, `M_(1)=18 g MOL^(-1)`
Molecular weight of urea, `M_(2)=60 g mol^(-1)`
Now, we have to calculate vapour pressure of water in the solution. We take vapour pressure as `p_(1)`.
Now, from Raoult.s law, we have :
`(p_(1)^(0)-p_(1))/(p_(1)^(0))=(n_(2))/(n_(2)+n_(2))`
`therefore (p_(1)^(0)-p_(1))/(p_(1)^(0))=((w_(2))/(M_(2)))/((w_(1))/(M_(1))+(w_(2))/(M_(2)))`
`therefore (23.8-p_(1))/(23.8)=((50)/(60))/((850)/(18))+(50)/(60)`
`therefore (23.8-p_(1))/(23.8)=(0.83)/(47.22+0.83)`
`therefore (23.8-p_(1))/(23.8)=0.0173`
`p_(1)=23.4` mm of Hg
Hence, the vapour pressure of water in the given solution is 23.4 mm of Hg and its relative lowering is 0.0173.
Discussion
12510.

What weight of copper will be deposited by passing 2 Faraday's of electricity through a cupric salt (Atomic weight of Cu = 63.5)

Answer»

`2.0g`
`3.175 G`
`63.5 g`
`127.0 g`

Solution :`CU^(2+) + 2e^(-) to Cu`
2 Faraday.s will DEPOSITE 1g ATOM of Cu = 63.5 g.
Discussion
12511.

Which type of polymers are used in plastic paints ?

Answer»

Heavy POLYMER
OLIGOMER
Natural polymer
NONE of these

SOLUTION :Oligomer
Discussion
12512.

What is the half life period of a first order reaction having rate constant 10^-2sec^-1?

Answer»

Solution :GIVE that
1ST ORDER RATE constant,`lambda=10^-2sec^-1`
Half-life period,`T_(1/2)=0.693\\lambda=(0.693/10^-2)sec.=0.693xx10^2=69.3sec.`
Discussion
12513.

Write IUPAC names of the following coordination compounds : (i) [Co(NH_(3))_(6)]Cl_(3) (ii) [Co(NH_(3))_(5)Cl]Cl_(2) (iii) K_(3)[Fe(CN)_(6)] (iv) K_(3)[Fe(C_(2)O_(4))_(3)] (v) K_(2)[PdCl_(4)] (vi) [Pt(NH_(3))_(2)Cl(NH_(2)CH_(3))]Cl.

Answer»

SOLUTION :(i) HEXAAMMINECOBALT (III) chloride
(II) pentaamminechloridocobalt (III) chloride
(iii) potassium HEXACYANOFERRATE (III)
(IV) potassium trioxalatoferrate (III)
(v) potassium tetrachloridopalladate (II)
(vi) diamminechlorido (methylamine) platinum (II) chloride
Discussion
12514.

Which of the following is considered to be an anti cancer species.

Answer»

cis-ptatin
trans PLATIN
`[pt Cl_4]`
`[pt(NH_3)_4]`

SOLUTION :C is platin is NEOPLASTIC
Discussion
12515.

Write the formula of the following complexes : Hexaammineplatinum(IV) chloride

Answer»

SOLUTION :FORMULAE of the COORDINATION compounds are GIVEN below :
`[PT(NH_(3))_(6)]Cl_(4)`
Discussion
12516.

Which of the following pairs of metals uis purified by vanarkel method?

Answer»

GA and In
Zr and Ti
Ag and Au
Ni and Fe

SOLUTION :`ZrandTi ` arepurifiedby vanArkelmethod
` Zr (s)+ 2I_2 (G)toZr I_4(g) `
` Arl_4(g)underset("filement") OVERSET("onthe HOT ")Zr(s)+ 2I_2 (g) `
Discussion
12517.

Which of the following is non- electrolyte

Answer»

NaCl
`CaCl_2`
`C_12 H_22 O_11`
`CH_3COOH`

SOLUTION :`C_(12)H_(22)O_(11)` is a non-electrolyte.
Discussion
12518.

Which one of the following is not applicable to the plenomenon of adsorption ?

Answer»

`Delta H gt 0`
`Delta G lt 0`
`Delta S lt 0`
`Delta H lt 0`

SOLUTION :In adsoprption `Delta Hlt 0` and HENCE OPTION (a) is not correct.
Discussion
12519.

The vapour pressure of pure components A and B are 200 torr and 100 torr respectively. Assuming a solution of these components obeys Raoult's law, the mole fraction of component. A in vapour phase in equilibrium with a solution containing equimoles of A and B is :

Answer»

<P>0.22
0.33
0.67
0.5

Solution :`P_(A)=200xx0.5=100` torr
`P_(B)=100xx0.5=50` torr
`P_("(total)")=P_(A)+P_(B)=100+50=150` torr
MOLE fraction of A in vapour PHASE
`=(100)/(150)=0.67`
Discussion
12520.

Which is used in the Haber.s process for the manufacture of NH_3 ?

Answer»

`Al_2O_3`
Fe+Mo
CuO
Pt

Answer :B
Discussion
12521.

Which of the following electrolytes is used to maintain electrical energy neutralityin the Daneil cell ?

Answer»

KCl
KOH
`NH_(4)CL`
NaCl

Answer :A
Discussion
12522.

Which one of the following compound have zero dipole moment ?

Answer»

p-dinitro benzene
p-dimethoxy benzene
1-butene
2-methyl-1-propene

Answer :A
Discussion
12523.

Which of the following is an alkyl halide

Answer»




All the above

ANSWER :B
Discussion
12524.

Using CH_3MgBr, which substrate would lead to (CH_3)_3COH?

Answer»

Acetone
Acetyl CHLORIDE
Acetaldehyde
Isopropyl ALCOHOL

ANSWER :A
Discussion
12525.

What are the uses of diethyl ether.

Answer»

Solution :1. Diethyl ether is used as a SURGICAL anesthetic agent in surgery.
2. It is a good solvent for organic reactions and extraction.
3. It is used as a volatile STARTING fluid for diesel and GASOLINE engine.
4. It is used as a refrigerant.
Discussion
12526.

Which among the following statements is incorrect?

Answer»

`XeF_(4) and SbF_(5)` combine to FORM salt.
He and Ne do not form clathrates.
He has highest boiling POINT in its GROUP.
He diffuses through rubber and polyvinyl chloride.

Answer :C
Discussion
12527.

Which of the following compound gives milky white solution with Lucas reagent ?

Answer»

Butane-1-ol
Butane-2-ol
2-methyl PROPANE - 2 -- ol
3-Methylbutan-2-ol

Solution : Butane-2-ol
Discussion
12528.

The volume of water to be added to 100 cm^(3) of 0.5N H_(2)SO_(4) to get decinormal concentration is

Answer»

`450 cm^(3)`
`100 cm^(3)`
`400 cm^(3)`
`500 cm^(3)`

Solution :`N_(1)V_(1) = N_(2)V_(2) , 100 cm^(3) xx 0.5N`
`=0.05 N xx V_(2) xx` GRAM equivalent of `H_(2)SO_(4)`
`(100 xx 0.5)/(0.05 xx2) = 500 cm^(3) = V_(2)`
Discussion
12529.

Which of the following is/are not known? (i) PCl_3 , AsCl_3 , SbCl_3 , NCl_5,PCl_5,BiCl_5

Answer»

Solution :(i) `NCl_5` is not known because of the absence of d-orbitals in nitrogen.
(ii) `BiCl_5`does not exist because `Bi^(5+)` being an oxidising AGENT OXIDISES `Cl^(-)` ion to `Cl_(2)`and `Cl^(-)` ion being a REDUCING agent reduces `Bi^(5+) to Bi^(3+)`
Discussion
12530.

Which of the following reaction occur during the electrolysis of CuSO_4 solution using copperelectrodes?

Answer»

`Cu to Cu^(+2) + 2e^(-)`
`2SO_4^(2-) + 2H_2O to 2H_2SO_4 + O_2`
`Cu^(+2) + 2e^(-) to Cu`
`2H^(+) + 2e^(-) to He `

SOLUTION :at anode : oxidation takes place i.e. [ loss of electrons ]
at cathode : reduction takes place i.e. [ GAIN of electrons]
`Cu to Cu^(+2) + 2e^(-)`
Discussion
12531.

Which of the following has not a lone pair ?

Answer»

`NH_3`
`PCl_3`
`PH_3`
`BF_3`

ANSWER :D
Discussion
12532.

Which gives an yellow oil with nitrous acid?

Answer»

`1^(@)` AMINE
`2^(@)` amine
`3^(@)` amine
quarternary salt

Answer :B
Discussion
12533.

Which of the following is the most basic in character

Answer»

`H_(2)O`
`CH_3CH_2OH`
`CH_3OCH_3`
`C_6H_5OH`

Solution :`H_2O` is the most basic because it is least sterically HINDERED LEWIS base.
Discussion
12534.

Write the name of phenyl-substituded groups: a. C_(6)H_(5) overset(|)(C)Hme, b C_(6)H_(5) CH_(2)- C. C_(6) H_(5) CH = CH-, d. C_(6)H_(5) == CHCH_(2)-

Answer»

SOLUTION :a. `C_(6) H_(5) overset(beta)(CH_(2)) -` (`beta` Phenethyul)
C. Stryl, d. Cinnamyl
Discussion
12535.

Which colligative property is preferred for the molar mass determination of macromolecules ?

Answer»

Solution :Osmotic pressure measurement is preferred for molar mass determination because :
(a) EVEN in DILUTE solution the osmotic pressure values are appreciably high and can be MEASURED accurately.
(b) osmotic pressure can be measured at room TEMPERATURE.
Discussion
12536.

Write the IUPAC names of (a) C_(2)H_(5)OCH_(3) (ii) C_(6)H_(5)OC_(2)H_(5)

Answer»

SOLUTION :
Discussion
12537.

What is RDX ?

Answer»

SOLUTION :RDX is Research and Development EXPLOSIVE which is prepared by the NITRATION of hexamethylene DIAMINE under controlled conditions.
Discussion
12538.

Which of the following polymer is stored in liver of animals ?

Answer»

Amylose
Cellulose
Amylopectin
GLYCOGEN

Solution :Glycogen
Discussion
12539.

Which of the following can not be made by reduction of ketone or aldenhyde with NaBH_4 ?

Answer»

1 - Butanol
2 - Butanol
2 - METHYL -1 - PROPANOL
2 - Methyl -2 - propanol

ANSWER :D
Discussion
12540.

What is the PH of the resulting solution when equal volumes of 0.1 M NaOH and 0.01 M HCl are mixed?

Answer»

`2.0`
3
`7.0`
12.65

Solution :X ml of 0.1 m NAOH+xmL of 0.01MHCl
No. of moles of NaOH =`0.1 TIMES x times 10^-3=0.1x times 10^-3`
No. of moles of HCl= `0.01 times x times 10^-3=0.01x times 10^-3`
=`0.09x times 10^-3`
Concentration of NaOH = `(0.09x times 10^-3)/(2x times 10^-3)=0.045`
`[OH^-]=0.045`
`=2-log 4.5`
`=2-0.65=1.35`
`pH=14-1.35=12.65`
Discussion
12541.

Which of the following statements is true in case of alkyl halides?

Answer»

They are polar in nature
They can form HYDROGEN bonds
They are HIGHLY soluble in water
They undergo addition reactions

Solution :Alkyl halides are polar in nature due to DIFFERENCE in electronegativitybetween CARBON and halogen.
Discussion
12542.

Which of the following has longest C-O bond length ? (Free bond length in CO is 1.128 Å)

Answer»

`[Fe(CO)_(4)]^(2-)`
`[Mn(CO)_(6)]^(+)`
`Ni(CO)_(4)`
`[Co(CO)_(4)]^(-)`

Solution :The greater the negative charge on the carbonyl complex, the easier it would be for the metal to allow its electrons to PARTICIPATE in the back bonding. As a result, higher would be the M-C BOND order and simultaneously, there would be greater reduction in the C-O bond order and HENCE larger bond length. Thus, `[Fe(CO)_(4)]^(2-)` has the lowest C-O bond order and, therefore, the longest bond length.
Discussion
12543.

Which one of the following compounds does not give addition reaction?

Answer»

Aldehydes
Alkanes
Alkenes
Alkynes

Answer :A
Discussion
12544.

What happens when formaldehyde reacts with ammonia ?

Answer»

Solution :AMMONIA reacts with formaldehyde to form a condensation product, HEXAMETHYLENE tetramine, commonly named as Urotropine.
`6HCHO+4NH_(3) to underset("Hexamethylenetetramine")((CH_(2))_(6)N_(4))+6H_(2)O`
Discussion
12545.

Which method of purification is represented by the following equations ? Ti(s)+2I_(2)(g) overset(523 K) to TiI_(4)(g) overset(1700 K) to K Ti(s) +2I_(2)(g)

Answer»

Zone
Cupellation
Poling
VAN Arkel METHOD.

Solution :The PROCESS is KNOWN as van Arkel Method.
Discussion
12546.

Which statement/relationship is correct?

Answer»

Use HYDROLYSIS SALT of strong base and weak acid GIVES a solution with phlt7
pH= `-log1/[H^+]`
only at `25^@C` the ph of water is 7
The VALUE of `PK_w` at `25^@C` is 7

Answer :C
Discussion
12547.

Vitamin C is :

Answer»

Alcohol
Amide
Amine
Lactone

Answer :A
Discussion
12548.

Wacker method is used to convert alkene into corresponding……….using PdCl_2

Answer»

ALCOHOL
KETONE
ALDEHYDE
Acid

Answer :C
Discussion
12549.

Which of the following process is used for the extractio of group 1 ?

Answer»

Electrolysis of AQUEOUS solution of a salt
Reduction with CARBON
Redcution of hydrogen
Electrolysis of fused chloride

Solution :Group one ELEMENTS are ALKALI metal which are very active
Discussion
12550.

To 10 ml of 0.1 M BaCl_(2) solution. 0.2 ml "of" 3 M Na_(2)SO_(4) is formed and is compeltely insoluble. All the salts are completely dissociated and change in volume is negligible. The

Answer»

FREEZING POINT is raised
Freezing point is lowered
Freezing point does not CHANGE
Boiling POINTIS lowered

Answer :C
Discussion