Explore topic-wise InterviewSolutions in Current Affairs.

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1.

IUPAC name of (CH_(3))_(2)CH-CHBr_(2)

Answer»

1,1-dibromo-2-methyl PROPANE
2-methyl-3-bromo propane
iso propyl BROMIDE
`3^(@)` BUTYL bromide

Solution :1,1-dibromo-2-methyl propane.
Discussion
2.

IUPAC name of CH_(3)-underset(underset(CH_(3))(|))(C )H-CH_(2)-CH-(CH_(2)-CH_(2)-CH_(2)-CH_(3))_(2) is…..

Answer»

1, 1-dibutyl-3-methylbutane
4,4-dibutyl-2-methylbutane
5-(2-methyl propyl)nonane
4-butyl-3-methyloctane

Solution :`ubrace(CH_(3)-underset(underset(CH_(3))(|))(CH)-CH_(2))_("5(-2methylpropyl)nonane") -{:(overset(5)(C )H-overset(4)(C )H_(2)-overset(3)(C)H_(2)-overset(2)(C )H_(2)- overset(1)(C )H_(3)),(" |"),(overset(6)(C )H_(2)-overset(7)(C )H_(2)-overset(8)(C )H_(2)-overset(9)(C )H_(3)):}`
Discussion
3.

IUPAC name of CH_(3) - underset(underset(CH_(3))(|))(CH) - CH_(2)OH

Answer»

sec-butyl ALCOHOL
per-butyl alcohol
2-methylpropanal
2-methyl propanol-1

Answer :D
Discussion
4.

IUPAC name of CH_3 - undersetoverset(||)(CH_2)(C ) - CH_3 - undersetoverset(||)(CH_2)( C) - CH_3

Answer»

2, 4-pentadiene
2,4-dimethyl-1, 4-pentadiene
2, 4-butadine
2, 4-ethenylpentane

ANSWER :B
Discussion
5.

IUPAC name of CH_3 - undersetoverset(|)(C_2H_5)(C )H - CH_2 - undersetoverset(|)(C_2H_5)( C)H - CH_3

Answer»

2, 4-diethylpentane
3, 5- dimethylheptane
3 - methyl 5 - ethylhexane
5 - ETHYL - 3- methylhexane

ANSWER :B
Discussion
6.

IUPAC name of CH_(3)-underset(OCH_(3))underset("|")("C")H-overset(O)overset("||")("C")-underset(CH_(3))underset("|")("C ")H-OCH_(2)-CH_(3)

Answer»

2-Methoxy-4-ethoxy-pentan-3-one
2-Ethoxy-4-methoxy-pentan-3-one
2,4-Dimethoxy hexanone
2-Ethoxy-3-methoxy-pentan-3-one

Solution :ACCORDING to ALPHABETICAL ORDER.
Discussion
7.

IUPAC name of CH_(3)-underset(CH_(3))underset(|)"CH"-CH_(2)-CH=CH_(2) is

Answer»

2-Methyl PENTENE
4-Methyl pentene-1
1-Hexene
2-Methyl pentene-1

SOLUTION :IUPAC NOMENCLATURE of RULES
Discussion
8.

IUPAC name of CH_(3)-underset(CH_(3))underset("|")("N ")-overset("Me")overset("|")underset(CH_(2)CH_(3))underset("|")("C - Et") is

Answer»

3-Methyl-N, N-dimethyl-3-pentanamine
2-Methyl-3-N, N-dimethylamonio pentane
3-Methyl-3-N, N-dimethylpentane
NONE of the above

SOLUTION :3-Methyl-N, N-dimethyl-3-pentanamine.
Discussion
9.

IUPAC name of CH_(3)-underset(CH_(2))underset("||")("C")-CH_(2)-underset(CH_(2))underset("||")("C")-CH_(3)

Answer»

2,4-pentasdiene
2,4-dimethyl-1,4-pentadiene
2,4-butadine
2,4-ethenylpentane

Solution :LONG CHAIN MUST be selected including with DOUBLE bonds.
Discussion
10.

IUPAC name of CH_(3)-underset(C_(2)H_(5))underset("|")("C")H-CH_(2)-underset(C_(2)H_(5))underset("|")("C")H-CH_(3)

Answer»

2,4-diethylpentane
3,5-dimethylheptane
3-methyl-5-ethylexane
5-ethyl-3-methylhexane

Solution :ACCORDING to LONG CHAIN RULE.
Discussion
11.

IUPAC name of CH_(3)-overset(H)overset(|)underset(C_(2)H_(5))underset(|)C-overset(C_(4)H_(9))overset(|)underset(CH_(3))underset(|)C-CH_(3) is ............ .

Answer»

3, 4, 4 - Trimethylheptane
2 - Ethyl-3, 3-dimethyl heptane
3, 4,4 - Trimethyloctane
2-Butyl-2-methyl-3-ethyl-butane.

Answer :C
Discussion
12.

IUPAC name of CH_(3) - underset(underset(CH_(3))(|))overset(overset(CH_(3))(|))(C )- CH= CH_(2) is

Answer»

3,3,3-Trimethyl-1-propene
1,1,1-Trimethyl-3-propene
3,3-Dimethyl-1-butene
1,1-Dimethyl-3-butene

SOLUTION :ACCORDING to LOCANT SET RULE.
Discussion
13.

IUPAC name of CH_(3)-overset(C_(2)H_(5))overset("|")underset(C_(2)H_(5))underset("|")("C")-CH_(3)

Answer»

2,2-Diethylpropane
3,3-Dimethylpentane
3-ehyl-3-methylbutane
3-ethyl-2-methylbutane

SOLUTION :ACCORDING to LONG CHAIN RULE.
Discussion
14.

IUPAC name of CH_(3) - CHCll - CH_(2) -CHO is

Answer»

2-chloro-4-butanol
3-chlorobutanol
2-chloro-4-butananl
3-chlorobutanal

Answer :D
Discussion
15.

IUPAC name of CH_(3)-CH_(2)-underset(CH_(3))underset(|)"CH"-NH_(2) is

Answer»

1-Methyl-1-aminopropane
2-aminobutane
2-Methyl-3-aminopropane
NONE of the above

SOLUTION :IUPAC NOMENCLATURE of RULES
Discussion
16.

IUPAC name of CH_(3)-CH_(2)-underset(CH_(3)-CH-CH_(3))underset("|")(CH_(2)-CH-CH_(3))is

Answer»

2,3-dimethylhexane
2-methyl-3-propylbutane
2-isopropylpentane
NONANE

SOLUTION :According to long CHAIN RULE.
Discussion
17.

IUPAC name ofCH_(2)=underset(CH_(3))underset("|")underset(H_(3)C-C-H"")underset("|")underset(H_(3)C-C-CH_(3)"")underset("|")overset(CH_(3))overset("|")(CH-"C "-CH_(2))-CH=CH_(2)

Answer»

3-(1,1,2-trimethyl) prpyl-1,5 hexadiene
3-methyl-1-3-(1,1,2-trimethyl PROPYL)-1,5 hexadiene
4-methyl-4-vinyl-5,5,6-trimethyl hept-1-ene
4,5,5,6-tetra methyl-4-vinyl hept-1-ene

Solution :COMPLEX SUBSTITUENTS
Discussion
18.

IUPAC name of CH_(2)=underset(CH_(3))underset("|")("C")-CH_(2)-overset(O)overset("||")("C")-O Et

Answer»

ETHYL 2-Methylbut-3-enoate
3-Ethylcrboxyprop-1-ene
4-oxo-4ethoxy-1-butane
Ethyl 3-methylbut-3-enoate

Solution :Ethyl 3-methylbut-3-enote.
Discussion
19.

IUPAC name of CH_(2)=CH-CH(CH_(3))_(2) is

Answer»

1, 1-Dimethyl-2-PROPANE
3-Methyl-1-butene
2-vinyl propane
1-Isopropyl ETHYLENE

SOLUTION :3-Methyl-1-butene.
Discussion
20.

IUPAC name of CH_(2)=CH-CH (CH_(3)CH_(2))underset(Br)underset(|)(C)=CH_(2) is :

Answer»

4-Bromo-3-ethyl-1, 4-pentadiene<BR>2-Bromo-3-ethyl-1, 4-pentadiene
2-Bromo-3-ethyl-1, 5-pentadiene
none of these

Solution :`{:(""Br),("|"),(OVERSET(5)(C)H_(2)=overset(4)(C)H-overset(3)(C)H-overset(2)(C=)overset(1)(C)H_(2)),("|"),(""CH_(2)CH_(3)):}`
2-Bromo-3-ethyl-1, 4-pentadiene.
Discussion
21.

IUPAC name of CH_(2)=C=CH_(2) is

Answer»

1, 2-PROPADIENE
1,1-propadiene
2,2-Propopadiene
1,3-Propadiene

SOLUTION :Propadiene.
Discussion
22.

IUPAC name of CH_2 = undersetoverset(|)(CH_3)(C ) - CH_2 - oversetunderset(||)(O)(C ) - O Et

Answer»

ETHYL 2-Methylbut -3-enoate
3-Ethylcarboxyprop-1-ene
4-oxo-4ethoxy-1-butane
Ethyl 3-methylbut-3-enoate

Answer :D
Discussion
23.

IUPAC name of the CH_(2) = CH-group is

Answer»

vinyl
Ethyl
Ethenyl
Ethynyl

Answer :C
Discussion
24.

IUPAC name of CH_2 = CH - CH (CH_3)_2 is

Answer»

1, 1-Dimethyl -2-PROPANE
3-Methyl -1- butene
2-vinyl propane
1-Isopropyl ethylene

Answer :B
Discussion
25.

IUPAC name of CH_(2) = CH - CH = CH_(2) is

Answer»

1, 2-BUTADIENE
1,3-Butadiene
1,4-Butadiene
Butadiene

ANSWER :B
Discussion
26.

IUPAC name of CH -= C - CH = CH_2 is

Answer»

1, 2 -Propadiene
1. 1-propadiene
2, 2-Propadiene
1, 3-Propadiene

ANSWER :A
Discussion
27.

IUPAC name of CH-=C-CH=CH_(2) is

Answer»

But-1-yn-3-ene
But-1-en-3-yne
But-1-yn-2-ene
None of the above

SOLUTION :But-1-ene-3-yne.
Discussion
28.

IUPAC name of CH -= C-CH= CH_(2) is

Answer»

But -1-en-3- YNE
But -1-yn-3-ene
But-1-yn -2-ene
NONE of the above

ANSWER :B
Discussion
29.

IUPAC name of CH -= C- CH= CH- CH= CH_(2)is……..

Answer»

Hexa-5-yne-1, 3-dine
Hexz-1, 3-dine-5-yne
Hexa dine-yne 1, 3, 5
Hexa-1-ene-1-yne-3-en

Answer :B
Discussion
30.

IUPAC name of Allyl chloride

Answer»

1-CHLORO -1-PROPENE
1- chloro -2- propene
3 - chloro -2- propene
3 - chloro-1-propene

Answer :D
Discussion
31.

IUPAC name of

Answer»

3-(1,1,2-trimethyl) PROPYL-1,5 hexadiene
3-methyl-3-(1,1,2-trimethyl propyl)-1,5 hexadiene
4-methyl-4-vinyl-5,5,6-trimethyl hept-1-ene
4,5,5,6-tetra methyl-4-vinyl hept-1-ene

ANSWER :B
Discussion
32.

IUPAC name of

Answer»

3-phenyl-1-butanol
3-phenyl-4-butanol
2- Benzyl-1-butanol
2- phenyl-1-butanol

Answer :D
Discussion
33.

IUPAC name of 4-isopropyl-m-xylene is

Answer»

1-Isopropyl-2, 4-dimethylbenzene
4-Isopropyl-m-xylene
1-Isopropyl-3, 5-dimethylbenzene
4-Isopropyl-3, 5-dimethylbezene

Solution :
Discussion
34.

IUPAC name of 4-iso-propyl-m-xylene is

Answer»

1-iso-propyl-2,4-dimethylbenzene
4-iso-propyl-m-xylene
4-iso-propyl-2,3-dimethylbenzene
4-iso-propyl-3,5-dimethylbenzene.

Answer :A
Discussion
35.

IUPAC name for the amine CH_(3)-underset(CH_(3))underset("|")("N")-overset(CH_(3))overset("|")underset(C_(2)H_(5))underset("|")("C")-CH_(2)-CH_(3)is

Answer»

3-methyl,3-ethyl-2-N-Methylpentane
3(N, N-Triethyl)-3-aminopentane
3-N, N-Trimethyl pentanamine
3-(N,N-Dimethylamino)-3-methylpentane

Solution :3-(N, N-Dimethylamino)-3-methylpentane.
Discussion
36.

IUPAC name

Answer»

1-Bromo-3-methyl pentanone-2
5- Bromo-3-methyl pentanone-4
4-Bromo-3-ethyl butanone-3
1- Bromo-3-ethyl butanone-2

Answer :A
Discussion
37.

IUPAC has made some recommendations to name elements with atomic number above 100. what would be the name for the elements with atomic number 104 ?

Answer»

SOLUTION :Unnilquadium
Discussion
38.

IUPAC and IUPAP have recommended ........... system to use uniformly.

Answer»

SI
UI
FPS
MKS

Answer :A
Discussion
39.

IUAPC name of allyl chloride is

Answer»

1-chloro PROPENE
2-chloro propene
3-chloro propene
3-chloropropane

ANSWER :C
Discussion
40.

It was found that 16.5 g of a metal combine with oxygen to form 35.6 g of metal oxide. Calculate the percentage of metal and oxygen in the compound.

Answer»


Solution :Percentage of METAL is the OXIDE `=((16.5u))/((278u))xx100=46.3%`
Percentage of OXYGEN in the oxide `= 100 - 46.3 = 53.7 %`.
Discussion
41.

It was experimentally found that formic acid is stronger acid than acetic acid. Which of the following effects is useful to explain this?

Answer»

Inductive
hyper conjugation
mesomeric effect
electromeric effect

Answer :D
Discussion
42.

It w is the amount of work by the system and q is the amount of heat supplied to the system, identify the type of the system.

Answer»

isolated SYSTEM
CLOSED system
OPEN system
system with thermally conducting walls

Solution :When a system ABSORBS HEAT and does work, it is closed system.
Discussion
43.

It ten volumes of dihydrogen gas reacts with five volumes of dioxygen gas, how many volumes of water vapour would be produced ?

Answer»



Solution :`{:(2H_(2(G)),+,O_(2(g)),rarr,2H_(2)O_((g)),),(2V,,1V,,2V,):}`
According to Gay-Lussac.s law, 2 volume dihydrogen gas COMBINE with 2 volume dioxygen gas to give 2 volume watervapour. So, it is 10 volume dihydrogen gas that combine with 5 volume dioxygen gas and FORM 10 volume water vapour.
Discussion
44.

It takes 192 sec for an unknown gas to diffuse through a porous wall and 84 sec for N_(2) gas to efffuse at the same temperature and pressure. What is the molar mass of the unknown gas?

Answer»

Solution :`(gamma_("unknown"))/(gamma_(N_(2)))= sqrt((m_(N2))/(m_("unknown")))`
`(84 sec)/(192 sec) = sqrt((28 g mol^(-1))/(m_("unknown")))=(28 g mol^(-1))/(m_("unknown"))`
`m_("unknown") = 28 g mol^(-1) XX ((192 sec)/(84 sec))^(2)`
` m_("unknown") = 146 . 28 g mol^(-1)` .
Discussion
45.

It temperature of gas increases 1^(@)C and pressure and mass will be constant then what will be change in volume ?

Answer»

SOLUTION :`((1)/(273.15))` INCREASES in VOLUME.
Discussion
46.

It t_(1//2) of A is 1000 yrs, then 'A' left after t=2000 years

Answer»

0.5
0.25
0.125
0.06725

Solution :`N=(2000)/(1000)=2`
`N_(0)=100`
`N=(N_(0))/(2^(n))=(100)/(2^(2))`
`=(100)/(4)=25%`
Discussion
47.

Itn =6l =1p orbitalm= 0.Thenthe maxelectronin porbitalare ……

Answer»

<P>6
2
4
10

Solution :N= 6,L =1m= + 10 = 1
`P_(x )p_(y)p_(z ) `
Total`E^(-) ` in porbitalare6 I`p_(y)` =2electron
Discussion
48.

It is were possible for hydrogen atom to exist with a position as the extra-nuclear particle, then the energy of position in first excited state will be-

Answer»

13.6 EV
3.4 eV
`-3.4eV`
6.8 eV

Answer :B
Discussion
49.

It is very easy to obtain M^(+) ion from an atom of alkaline earth metals. But M^(+) ions are not formed. Why?

Answer»

Solution :Though the formation of `M^(+2)` ions is difficult, alkaline earth metals are familier to have them in SOLID state as well as in solution state. The LATTICE ENERGY in solid state or HYDRATION energy in SOLUTIONS of `M^(2+)`ions is more. This dominates the second ionisation energy of alkalinc carth metals.
Discussion
50.

It is very difficult to esterify R_3C-COOH because of

Answer»

STERIC INHIBITION
Delocalisation
INDUCTIVE effect
HYPER conjugation

Answer :A
Discussion