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.

15901.

Which of the following are bidentate monovalent anion ligands ? (a) Acetylacetonato (b) Oxalato ion (c) Dimethylglyoximato Select the correct answer :-

Answer»

(a) only
(a) and (C) only
(c) only
(B) and (c) only

Answer :B
Discussion
15902.

Which of the following will increase with the increase in temperature?

Answer»

SURFACE tension
Viscosity
Molality
Vapour pressure

Answer :D
Discussion
15903.

Which of the following has the largest ionic radius?

Answer»

`Be^(2+)`
`Mg^(2+)`
`Ca^(2+)`
`SR^(2+)`

SOLUTION :IONIC SIZE increase down a group.
Discussion
15904.

Which of the following statements is not correct from the point of view of molecular orbital theory ?

Answer»

`Be_(2)` is not a stable MOLECULE
`He_(2)` is not stable but`He_(2)^(+)`is EXPECTED to exist
Bond strength of `N_(2)`is maximum amongst the homonuclear diatomic molecules
The order of ENERGIES of molecular orbitals in `F_(2)`molecule is `pi_(2p_(x)) = pi_(2p_(y)) lt sigma_(2p_(z))`

Answer :D
Discussion
15905.

Two well known reactionare given below: Suggest the main product ofeach reaction. Also give the name of each reaction.CH_3NH_2overset(CHCl_3+alc.KOH)

Answer»

SOLUTION :`CH_3NH_2overset(CHCl_3+alc.KOH)toCH_3NC+KCl+H_2O`(CARBYLAMINE REACTION)
Discussion
15906.

Two well known reactionare given below: Suggest the main product ofeach reaction. Also give the name of each reaction.CH_3CONH_2overset(Br_2,NaOH)to

Answer»

SOLUTION :`CH_3CONH_2overset(Br_2,NAOH)toCH_3NH_2`(HOFFMANN bromamide REACTION)
Discussion
15907.

Which of the following compound have maximum three identical bond angles?

Answer»

`BF_(4)^(Theta)`
`NH_(3)`
`PCl_(5)`
All are correct

Solution :
Discussion
15908.

The synthesis of alkyl is best accomplished by :

Answer»

Free radical fluorination
Sandmeyer's REACTION
FINKELSTEIN reaction
SWARTS reaction

Answer :D
Discussion
15909.

Which metal is purified by liquation method ?

Answer»

SN 
SI 
NI 
CU 

ANSWER :A
Discussion
15910.

Which type of aldehydes undergo Cannizzaro's reaction ?

Answer»

SOLUTION :The ALDEHYDES CONTAINING `ALPHA`-HYDROGEN undergo Cannizzaro.s reaction.
Discussion
15911.

Which one is the anhydride of HClO_4

Answer»

`Cl_2O`
`ClO_2`
`Cl_2O_6`
`Cl_2O_7`

ANSWER :D
Discussion
15912.

Which one of the following ions exhibits d-d transition and paramagnetism as well?

Answer»

`MnO_(4)^(2-)`
`CrO_(4)^(2-)`
`MnO_(4)^(2-)`
`Cr_(2)O_(7)^(2-)`

Solution :`MnO_(4)^(2-)` (MANGANATE) ion has `Mn^(6+)`. Electron configuration of the `Mn^(6+)` is-

There is incomplete 3d in it. It has ONE electron in 3d, hence it is aromatici and hence d-d transition OCCURS in it.
Discussion
15913.

Which of the followig show maximum number of different oxidation state in its compounds ?

Answer»

Eu
Gd
La
Nd

Solution :We KNOW that, lanthanide doesn't show HIGHER OXIDATION in its compounds i.e. `+2,+3,+4.`
Discussion
15914.

Which of the following reacts with water to produce electron-precise hydrides-

Answer»

`Ca_(3)P_(2)`
`Al_(4)C_(3)`
`Mg_(3)N_(2)`
none of these

Answer :B
Discussion
15915.

What are the advantages of using hydrogen as a fuel ?

Answer»

SOLUTION :It is a RENEWABLE and non-polluting SOURCE of energy. Its combustion RESULTS in the formation of water only.
Discussion
15916.

Which of the following ores represent the ores of iron?

Answer»

CASSITERITE
LIMONITE
HAEMATITE
Magnetite

Solution :Cassiterite `(SnO_(2))`, Magnetite `(Fe_(3)O_(4))`, Limonite `(Fe_(2)O_(3))` and Haematite `(Fe_(2)O_(3))`.
Discussion
15917.

There are four nuclei A,B.Cand D having mass numbers 9, 10,11 and , 12 respectively. Their binding gnergies are 54, 10, 11 and 12 respectively. Their binding energies are 54,70,66 and 78 MeV, respectively. Which of the following statement is/are true ?

Answer»

The most stable nuclei is B.
A and C have EQUAL stabilities.
The relative order of STABILITY is : `DGT BGT C= A.
D is more stable than C but less stable than B.

Answer :A::B::D
Discussion
15918.

Which of the following is contributed towards the extra stability of lyophillic colloid?

Answer»

HYDRATION
Charge
Colour
Tyndall effect

Solution :Hydration
Discussion
15919.

What are aminoglycosides? Give its function and uses.

Answer»

Solution :(i) Aminoglycosides BIND to the 30S subunit of the bacterial ribosome, THUS stopping bacteria from making PROTEINS.
(ii) It is used to treat INFECTIONS CAUSED by gram negative bacteria.
Discussion
15920.

Which has the lowest boiling point:

Answer»

`H_2O`
`H_2S`
`H_2Se`
`H_2Te`

ANSWER :B
Discussion
15921.

Which of the following has greatest affinity for haemoglobin?

Answer»

CO
`NO_2`
`O_2`
`CO_2`

SOLUTION :CO COMBINES readily with HAEMOGLOBIN and forms CARBOXYHAEMOGLOBIN.
Discussion
15922.

Which of the following oxides will be the least acidic ?

Answer»

`P_4O_6`
`P_4O_10`
`As_4O_6`
`As_4O_10`

ANSWER :C
Discussion
15923.

What changes occur when acidified CrO_(4)^(2-) ion react with H_(2)O_(2) solution in presence of ether solvent?

Answer»

ORANGE colour of SOLUTION TURNS blue
Oxidation state of Cr-atom decrease
Oxidation state of Cr-atom REMAINS constant
Orange colour of solution turns green

Answer :A::C
Discussion
15924.

Write the formulae of any two oxoacids of sulphur.

Answer»

SOLUTION :`H_2SO_3` SULPHUROUS ACID`H_2SO_4` SULPHURIC acid
Discussion
15925.

Which of the following reagents can convert acetic acid into ethanol :

Answer»

SN + HCI
`H_2 + PT`
`LiAIH_4 +ETHER`
Na + alcohol

Answer :C
Discussion
15926.

Which of the following compound will give smell of NH_(4) with conc. NaOH.

Answer»

`CH_(3)-CH_(2)-underset(O)underset(||)C-NH_(2)`
`CH_(3)-underset(O)underset(||)C-CH_(2)-NH_(2)`

`CH_(3)-CH_(2)-underset(O)underset(||)C-OH`

SOLUTION :Amide gives SMELL of `NH_(3)` with conc. `NaOH`.
Discussion
15927.

The root mean square speed of one mole of a monoatomic gas having molecular mass M is U_("rms"). The relation between the average kinetic energy (E ) of the gas and U_("rms") is :

Answer»

`U_(rms) =SQRT((3E)/(2M))`
`U_(rms)=sqrt((2E)/(3M))`
`U_(rms) =sqrt((2E)/(M))`
`U_(rms)=sqrt((E )/(3M))`

Solution :`U_(rms) =sqrt((3RT)/(M), KE =(3)/(2) RT`
`therefore U_(rms) =sqrt((2E)/(M))`
Hence, (C ) is the correct ANSWER.
Discussion
15928.

Whatare the major

Answer»

Solution :(i) Protein are classifiedbasedon theirstructure intotwo major TYPES . They arefibrousprotein and glubularprotein .
(ii) Fibrousproteinarelinear moleculessimilar tofibres. They aregenerallyinsolublein waterand are heldtogetherby disulpharebridges and weakintermolecularhydrogen bonds. Theseprotein oftenused as structuralproteins .
Example., Keration , Collagen.
(III)Globularproteinhavean overallspherical shape . Thepoly peptidechainis folded intoaspherical shape . These PROTEINS are usally SOLUBLEIN waterandhave manyfunctionsincludingcatalysis.
Discussion
15929.

What are zeolites ? Name the zeolite catalyst which converts alcohol to gasoline (petrol).

Answer»
Discussion
15930.

The solubility product of silver chromate be K_(sp), its solubility is

Answer»

`root(3)(K_(sp ) //8)`
`root(3)(K_(sp))`
`root(3)(K_(sp)//4)`
`root(3)(K_(sp) //2)`

SOLUTION :`Ag_2 CrO _4 ` DISSOCIATES as
`Ag_2 CrO_4hArr2Ag^+ +CRO_(4)^(-)`
`K_(sp)=[AG^+] ^2[CrO_(4)^(-)]`
supposethe solubiltyof ` Ag_2 CrO_4`is Smol /litrethen
`K_(sp )= (2s)^2(s )= 4s^3`
` thereforeS=root(3) (K_(sp ) //4)`
Discussion
15931.

The structure of the compounds formed by the the reaction of diethyl ether with oxygen of air is :

Answer»

`CH_(3)CH_2-O-O-CH_(2)CH_(3)`
`CH_(3)CH_(2)-O-overset(CH_(3))overset(|)(C)H-O-O-H`
`CH_(3)CH_(2)-O-O-CH_(2)-O-CH_(3)`
`CH_(2)(OCH_(3))-CH_(2)-O-C_(2)H_(5)`

SOLUTION :
Discussion
15932.

When ethyl alcohol vapoursare passed over heated platinized asbestos, the compound formed is :

Answer»

Acetaldehyde
Diethyl ether
Acetone
None

Answer :A
Discussion
15933.

Which of the following gases, will be adsorbed maximum on a solid surface :

Answer»

`CO_(2)`
`O_(2)`
`N_(2)` is added at constant volume
`H_(2)`

SOLUTION :Easily liquefiable GASES like `CO_(2)` are adsorbed to a greater extent than gases like `O_(2),N_(2)` and `H_(2)`.
Discussion
15934.

What is X ?

Answer»

a.
B.
C.

ANSWER :B
Discussion
15935.

Which of the following are correct about Charles' law?

Answer»

`(DEL V //del t)_(P)=` constant
`V PROP P` at constant P and N
`V prop P` at CONSTNAT T,n
`Vprop 1//T` at constant P,n

Solution :Charles. law `Vprop T`
Discussion
15936.

Two oxides of Nitrogen, NO and NO, react together at 253K and form a compound of Nitrogen, 'x'. 'x' reacts with water to yield another compound of Nitrogen, 'y'. The shape of the anion of 'y' molecule is

Answer»

Tetrahedral
Angular
SQUARE planar
Pyramidal

ANSWER :2
Discussion
15937.

Which of the following is not a favourable condition for physical adsorption. ?

Answer»

HIGH PRESSURE
Negative `DELTAH`
Higher CRITICAL temperature of adsorbate
High temperature

Solution :Physical adsorption decreases with increase of pressure.
Discussion
15938.

Which of the following is not the product of dehydration of

Answer»




ANSWER :D
Discussion
15939.

Which product is formed when calcium formate is distilled ?

Answer»

SOLUTION :FORMALDEHYDE
Discussion
15940.

Which of the following compounds give colour due to charge transfer?

Answer»

`K_(2)Cr_(2)O`
 `KMnO_(4)`
 `[Fe(H_(2)O)_(5) NO]SO_(4)`
`CaCl_(2)`

ANSWER :A::B::C::D
Discussion
15941.

Which of the following is true for construct cell by E_(Cu^(2+)|Cu)^(Theta)=+0.34V and E_(H^(+)|H_(2))^(Theta)=0 ?

Answer»

`Pt|H_(2(g))|H_((aq))^(+)(1M)||Cu_((aq))^(2+)(1M)|Cu_((S))`
`Pt|H_(2(g))(1" BAR")|H_((aq))^(+)(1M)||Cu_((S))|Cu_((aq))^(2+)(1M)`
`Cu_((S))|Cu_((aq))^(2+)(1M)||H_((aq))^(+)(1M)|H_(2(a))(1" bar")|Pt`
`Pt|H_((aq))^(+)(1M)||H_(2(g))(1" bar")|Cu_((S))|Cu_((aq))^(2+)(1M)`

SOLUTION :`Pt|H_(2(g))|H_((aq))^(+)(1M)||Cu_((aq))^(2+)(1M)|Cu_((S))`
Discussion
15942.

Which has zero dipole moment?

Answer»

`CO_2 `
`SO_2`
`H_2O`
`NH_3 `

ANSWER :A
Discussion
15943.

What kind of substitution is involved in the reaction of amines with carboxylic acid derivatives ?

Answer»


ANSWER :NUCLEOPHILIC
Discussion
15944.

What is Goldsehmidt thermite process ?Explain the following terms : (a) Zone refining (Fractional crystallization) (b) Electrorefining (c) van arkel method

Answer»

Solution :Certain oxides are not satisfactorily reduced by carbon. In such cases aluminium is used as a reducing agent. A mixture of metallic oxide and aluminium powder is ignited in a closed crucible by means of lighted magnesium ribbon. Metals like CHROMIUM, manganese etc., are extracted by thermite process as illustrated below.
`{:(Cr_(2)O_(3) + 2AI rarr Al_(2)O_(3) + 2Cr),(3Mn_(3)O_(4) rarr 4Al_(2)O_(3) + 9Mn):}`
The reaction is HIGHLY exothermic and the heat produced is sufficient to melt the metal.
(a) Zone refining (Fractional crystallization) : This method is employed for preparing extremely pure metals. This method is based upon the principle that when a molten solution of the impure metal is allowed to cool, the pure metal crystallizes out while the impurities remain in the melt.
(b) Electrorefining : In this method, the impure metal is converted into a block which FORMS the anode while cathode is a rod or PLATE of pure metal. These electrodes are suspended in an electrolyte which is the solution of a soluble salt of the metal usually a double salt of the metal. When electric current is passed, metal ions from the electrolyte are deposited at the cathode in the form of pure metal while an equivalent amount of metal dissolves form the anode and goes into the electrolyte solution as metal ion. The soluble impurities present in the crude metal anode GO into the solution while the insoluble impurities settle down below the anode as anode mud.
(c) van Arkel method : In this method, the metal is converted into its volatile unstable compound such as iodide leaving behind the impurities. The unstable compound, thus formed is decomposed to get the pure metal.
`Ti(s)+2I_(2)(s) + underset(540 K)rArr Til_(4)(g) underset(Ti(s))overset(1700 K)rarr Ti + 2I_(2)(g)`
Discussion
15945.

Which of the following has largest number of atoms?

Answer»

0.5 G ATOM of CU
0.635 g of Cu
0.25 MOLES of Cu-atom
1 g of Cu

SOLUTION :0.5 g atom of Cu
Discussion
15946.

Which of the following molecule has lower v_(c-o) (stretching vibration frequency of C-O bond) ?

Answer»

`[Pt(CO)_(2)Cl_(2)]`
`[PtCl_(3)(CO)]^(Ө)`
Both have EQUAL `v_(c-o)`
None of these

Solution :As C-O bond STRENGTH`uarr`, stretching frequency `""^(V)couarr` (for C-O bond) CO is a better `pi`-ACCEPTOR than `Cl^(-)` hence, `[Pt Cl_(3)(CO)]^(-)` has better back bonding and poor C-O bond strength.
Discussion
15947.

Which of the following has maximum C-O bond length?

Answer»

CO
`CO_(2)`
`[Cr(CO)_(6)]`
`CO_(3)^(2-)`

Solution :`CO_(3)^(2-)` ION has MINIMUM BOND order = 1.33, hence `CO_(3)^(2-)` has MAXIMUM C-O bond length.
Discussion
15948.

Which metals) is (are)non- volatile?

Answer»

Cu
ZN
Pb
CD

Solution :Zn & Cd are VOLATILE METALS.
Discussion
15949.

Which alkyl halide from the following pair is chiral and undergoes S_(N^(2)) reaction faster?

Answer»

SOLUTION :The isomer (b) has a chiral CARBON while isomer (a) with LESS STERIC HINDRANCE undergoes `S_N^(2)` reaction faster.
Discussion
15950.

What are the monomers of Buna -S ?

Answer»

SOLUTION :These are 1,3 - BUTADIENE,
`CH_2 = CH- CH=CH_2` and STYRENE
Discussion