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.

93801.

................. inhibits bacterial enzyme DNA gyrase.

Answer»

SOLUTION :FLUOROQUINOLONES
Discussion
93802.

, Instant turbidity Identyfy X :

Answer»

`CH_(3)-overset(CH_(3))overset(|)(CH)-UNDERSET(OH)underset(|)(CH)-CH_(3)`
`CH_(3)-overset(CH_(3))overset(|)underset(OH)underset(|)(C)-CH_(2)-CH_(3)`
`CH_(3)-overset(CH_(3))overset(|)(CH)-CH_(2)-CH_(2)-OH`
`CH_(3)-overset(OH)overset(|)(CH)-CH_(2)-CH_(2)-OH`

Solution :`3^(@)` alcohol GIVES INSTANT TURBIDITY with lucas reagent.
Discussion
93803.

............... inhibits bacterial cell wall biosynthesis.

Answer»

SOLUTION :ANTIMICROBIALS
Discussion
93804.

In aqueous solution, basic character of methylamines follows the order, 1°>2°>3°

Answer»


ANSWER :F
Discussion
93805.

In anhydrous state, basic character of ethylamines follows the order , 3°>2°>1°

Answer»


ANSWER :T
Discussion
93806.

In a buffer solution of weak acid and its salt, when the concentration of salt to acid is increased by 10 times, the pH of the solution,

Answer»

 INCREASES by one
decreases by one
decreases TEN FOLD
 increases ten fold.

SOLUTION :`pH_(1)=(1)/(log[H^(+)]^(+))`,`pH_(2)=(1)/(log[10H^(+)])`
`(pH_(1))/(pH_(2))=(1//log[H^(+)])/(1//log[10H^(+)])=(log10+log[H^(+)])/(log[H^(+)])`
=`(1+log[H^(+)])/(log[H^(+)])`
pH of the solution increases by one factor.
Discussion
93807.

. Identify X,A,Y,Z.

Answer»

A-methoxymethane, X-ehtanol,Y-ethanoic ACID, Z-semicarbazide
A-ethanol, X-ethano,Y-but -z-enal, Z-semicarbazone.
A-ehtanol,X-Acetaldehyde, Y-Butanone, Z-Hydroazone
A-Methoxymethane, X-ethanoicacid, Y-acetate ION and Z-Hydrazine.

ANSWER :B
Discussion
93808.

. Identify the reactant

Answer»

`H_(2)O`
HCHO
CO
`CH_(3)CHO`.

SOLUTION :Like `C_(6)H_(5)CHO,(CH_(3))_(3)"CC"HO` has m `alpha`-HYDROGEN which is a condition for this type of reaction (i.e., CANNIZZARO's reaction).
Discussion
93809.

+I effect is shown by

Answer»

`-CH_(3)`<BR>`-Br`
`-CI`
`-NO_(2)`

Solution :`-Br, -CI, -NO_(2)` show (-I) EFFECT as all are electron attracting or withdrawing.
`+I` effect is shown by `-CH_(3)` group only.This is electron releasing or repelling group.
Discussion
93810.

____ helps to maintain pH of blood between 7.26 to 7.42

Answer»

`CO_(2)`
`H_(2)CO_(3)`
`CO_(3)^(20-)`
`H_(2)CO_(3) or HCO_(3)^(-)`

Solution :`H_(2)CO_(3) or HCO_(3)^(-)` BUFFER system help to maintain PH of blood between 7.26 to 7.42
Discussion
93811.

………….+HCl to NaCl + H_(2)O + CO_(2)

Answer»

`NaHCO_(3)`
NACL
`NaSO_(4)`
NaOH

Answer :A
Discussion
93812.

"______" has thehighestelectricsconductivityat roommtemperature .

Answer»

CHROMIUM
COPPER
Silver
CADMIUM

Answer :C
Discussion
93813.

............ has a half life 2.5 hours within the body.

Answer»

SOLUTION :PARACETAMOL
Discussion
93814.

........... gases like H_(2), N_(2), O_(2)have low critical temperature and ........... slowly

Answer»

SOLUTION :PERMANENT , adsorbed
Discussion
93815.

.......... gas is obtained on reaction of ammonium sulphate with caustic soda ?

Answer»

`H_(2)`
`Cl_(2)`
`O_(2)`
`NH_(3)`

Solution :`(NH_(4))_(2)SO_(4) + 2NAOH(aq) to 2NH_(3) + 2H_(2)O + Na_(2)SO_(4)`
Discussion
93816.

_______ enzyme hydrolyses starch into maltose.

Answer»

pepsin
diastase
zymase
urease

Answer :B
Discussion
93817.

………………… dye is formed when phenol couples with benzene diazonium chloride in an alkaline solution.

Answer»

SOLUTION :P-hydroxy AZO BENZENE (or) Red orange DYE
Discussion
93818.

.................... donot become soft on heating but set to an infusible mass upon heating.

Answer»

SOLUTION :THERMOSETTING
Discussion
93819.

................. do not form oxo cations.

Answer»

SOLUTION : LANTHANOIDS
Discussion
93820.

_____ distinguishes between acetaldehyde and acetone.

Answer»

SOLUTION :Tollen.s REAGENT
Discussion
93821.

……………….. Dilates blood vessels.

Answer»


ANSWER :HISTAMINE
Discussion
93822.

-(d[H_2O_2])/(dt) represented

Answer»

rate of formation of `H_2O_2`
rate of decompotion of `H_2O_2`
order of reaction
none

Solution :CHANGE in conc. W.r.t. REACTANT is indicated by -ve SIGN.
Discussion
93823.

........... destroys the activity of platinum in contact process

Answer»

SOLUTION :`AS_2O_3` CATALYST POISON
Discussion
93824.

…………………..defect arises due to the missing of equal number of cations and anions from the crystal lattice.

Answer»

SOLUTION :SCHOTTKY
Discussion
93825.

, 'D' is

Answer»

o-bromo benzoic ACID
phenyl acetic acid
p-bromo benoic acid
m-bromo benzoic acid

Solution :N-Bromo SUCCINIMIDE (NBS) HELPS in BENZYLIC bromination.
Discussion
93826.

………………….. Crystal to act as a molecular sieve.

Answer»


ANSWER :ZEOLITE
Discussion
93827.

-COOH is ________ directing group.

Answer»

ORTHO
meta
para
both ortho and para

Answer :B
Discussion
93828.

-COOH is a /an ………….group but COO^- is a /an …………..group.

Answer»


ANSWER :DEACTIVATING ACTIVATING
Discussion
93829.

(-COOH) group of a compound does not react with NaHSO_3 even though it has >C=O group because of:

Answer»

ACID CHARACTER
Resonance
Cyclic structure
The ATTACHED ORGANIC group.

Answer :B
Discussion
93830.

-COOH group is obtained by acid hydrolysis of

Answer»

`-CHO`
`-C EQUIV N`
`-CH_(2)-OH`
`-overset(overset(O)(abs()))(C)-`

ANSWER :B
Discussion
93831.

- COOH group of a compound does not react with NaHSO_(3) even though it has gt C = O group because of

Answer»

CYCLIC STRUCTURE
acidic character
linear structure
resonance

Answer :D
Discussion
93832.

-COOH group can be converted to -NH_(2) group by :

Answer»

Claisen condensation
Schmidt reaction
Perkin 's reaction
Cannizzaro 's reaction.

Answer :B
Discussion
93833.

.......... concentration phenol solution acts as disinfectants.

Answer»

`2 %` 
`1%` 
`0.2%` 
`0.1%`

SOLUTION :`1 %`
Discussion
93834.

, Compounds (X) and (Y) can be differentiated by :

Answer»

`H_(3)O^(o+), NAOI`
`H_(3)O^(o+)`, then FEHLING test
`H_(3)O^(o+)`, then Na
Both (b) and (C)

Solution :
Discussion
93835.

…………………….. Compounds are the important consituents of explosives, drugs, dyes, fuels, polymers, synthetic rubbers.

Answer»


ANSWER :NOTROGEN
Discussion
93836.

……………. compound gives Hofmann bromamide reaction.

Answer»

ETHYL cyanide
Ethenoic acid
Ethenamide
Ethenamine

Answer :C
Discussion
93837.

{:("Column A","Column B"),("A) Glass","1) Framework silica"),("B) Quartz","2) Malleable and ductile"),("C) Metallic crystal","3) Pseudo solid"):} The correct match is

Answer»

`{:(A,B,C),(1,3,2):}`
`{:(A,B,C),(3,1,2):}`
`{:(A,B,C),(2,1,3):}`
`{:(A,B,C),(1,2,3):}`

ANSWER :B
Discussion
93838.

........... colloid is used as eye lotion.

Answer»

SOLUTION :ARGYROL
Discussion
93839.

_____is/are used to obtain aromatic comopounds.

Answer»

Wood
Coal tar
Petroleum
Both B and C

Answer :Bituminus
Discussion
93840.

-CN group is converted into- COOH group by ,

Answer»

HYDROLYSIS
OXIDATION
REDUCTION
ESTERIFICATION

ANSWER :A
Discussion
93841.

+CH_(3)NH_(2)rarr Product: product is :

Answer»




NONE of these

Solution :
Discussion
93842.

+CH_(3)MgBroverset(H_(3)O^(+))(to)P. Product P in the above reaction is ……………..

Answer»




ANSWER :B
Discussion
93843.

, CH_(3)CH_(2)COOHIdentify X:

Answer»

`CH_(3)-CH_(2)-C-=C-CH_(2)-CH_(3)`
`CH_(3)-C-=CH_(2)-CH_(2)-CH_(3)`

SOLUTION :N//A
Discussion
93844.

+CH_(3)-NH_(2)toP P is?

Answer»




SOLUTION :
Discussion
93845.

{:(""CH_(3)),(""|),(CH_(3)-CH-CH-CH-CH_(2)-CH_(2)),(""| ""|),(""CH_(2)-Cl CH_(3)):} locants at parent carbon chain will be :-

Answer»

1
2
3
4

Answer :D
Discussion
93846.

-CH_2OH group is obtained by reduction of

Answer»

R-CN
`R-NO_2`
R-CO-R
R-COOH

Answer :D
Discussion
93847.

+CH_2N_2overset(UV)tomtoTotal no .of products.

Answer»


Solution :Some INITIALLY formed SINGLET carbene consume collides with inert gas molecule and changes to triplet.

TOTAL 3 stereoisomers (2 optically ACTIVE, 1 optically inactive)
Discussion
93848.

(-CH_(2) - underset(CH_(3))underset(||)overset(CH_(3))overset(||)(C) - CH_(2) - underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-)_(n) is apolymer having monomer units

Answer»




ANSWER :A
Discussion
93849.

(--CH_2-underset(CH_3)underset(|)overset(CH_3)overset(|)C-CH_2-underset(CH_3)underset(|)overset(CH_3)overset(|)C--)_n is a polymer having monomer units .............

Answer»




SOLUTION :ISOBUTYLENE , is the MONOMER .
Discussion
93850.

(-- CH_2 - underset(CH_3)underset(|) overset(CH_3)overset(|)C-CH_2 - underset(CH_3)underset(|)overset(CH_3)overset(|)C--)_n is a polymer having monomer units.

Answer»




SOLUTION :The REPEATING strtuctural unit in the given POLYMER is `-CH_2 - underset(CH_3)underset(|) overset(CH_3)overset(|)C -`and HENCE the MONOMER is isobutylene,
Discussion