Explore topic-wise InterviewSolutions in Current Affairs.

This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.

1.

In the following reaction , CH_2 = CH underset((ii) Zn//H_2O)overset((i) O_3)(to) X overset(NH_3)(to) Y'y' is

Answer»

formaldehyde
diacetoneammonia
hexamethylenetertraamine
OXIME

SOLUTION :X - HCHO
`Y- (CH_2)_6N_4`
Discussion
2.

In the bleaching action of SO_(2) ________

Answer»

`SO_(2)` is REDUCED
`SO_(2)` is oxidised into `H_(2)SO_(4)`
`H_(2)S` is formed
COLOURED matter is reduced

Solution :`SO_(2)+2H_(2)O to H_(2)SO_(4)+2[H]`
Discussion
3.

In the following reaction, C_(6)H_(5)CH_(2)Br underset((ii)H_(3)O^(+))overset((i)" Mg, ether")toX, the product 'X' is

Answer»

`C_(6)H_(5)CH_(2)OCH_(2)C_(6)H_(5)`
`C_(6)H_(5)CH_(2)OH`
`C_(6)H_(5)CH_(3)`
`C_(6)H_(5)CH_(2)CH_(2)C_(6)H_(5)`

SOLUTION :`C_(6)H_(5)CH_(2)Br overset("Mg, ETHER")to C_(6)H_(5)CH_(2)MGBR overset(H_(3)O^(+))to C_(6)H_(5)CH_(3)+Mg(Br)OH`
Discussion
4.

In the blast furnace, the reaction that is taking place at the temperature zone of 900 K to 1500 K is

Answer»

`FEO + CO to Fe + CO_(2)`
`Fe_(2) O_(3) + CO to 2 FeO + CO_(2)`
`Fe_(3) O_(4) + CO to 3 Fe + CO_(2)`
All the above reactions

Answer :A
Discussion
5.

In the following reaction , C_(6)H_(5)CH_(2)Broverset(1.Mg,Ether)underset(2.H_(3)O^(+))rarrX, the product 'X' is

Answer»

`C_(6)H_(5)CH_(2)OCH_(2)C_(6)H_(5)`
`C_(6)H_(5)CH_(2)OH`
`C_(6)H_(5)CH_(3)`
`C_(6)H_(5)CH_(2)CH_(2)C_(6)H_(5)`

Answer :C
Discussion
6.

In the blast furnace for manufacturing iron, most of the reduction is carried out by CO rather than C (coke). How can you account for this?

Answer»


ANSWER :From the ellingham diagram, it can be seen that CO can REDUCE iron oxide at lower termperature WHEREAS CARBON can reduce iron oxide only above 1073K.
Discussion
7.

In the Bessemer Converter process, Bessemer Converter is line with 'X' when pig iron contains phosphrous, while it is lined with 'Y' when pig iron contains manganese as impurity. Here substances X and Y are

Answer»

`SiO_(2) " and " SiO_(2)`
CAO and CaO
`SiO_(2)` and CaO
CaO and `SiO_(2)`

ANSWER :4
Discussion
8.

In the following reaction, C_(2)H_(5)OC_(2)H_(5) overset("Red P"+HI)to 2X+H_(2)O X is

Answer»

ethane
ethylene
butane
propane

Solution :`C_(2)H_(5)OC_(2)H_(5) underset("cleavage")OVERSET("HI")to 2C_(2)H_(5)I underset("REDUCTION")overset("red P"+ HI) to underset("ethane")( 2C_(2)H_(6))`
Discussion
9.

In the Bessemer and open-hearth process for the manufacture of steel, which one of the following is used for the removal of carbon in part or whole

Answer»

`{:("BESSEMER","Open-hearth"),("(a)Ferric oxide","Air"):}`
`{:("Bessemer","Open-hearth"),("(b)Air","Ferric oxide"):}`
`{:("Bessemer","Open-hearth"),("(c)Oxygen","SCRAP IRON"):}`
`{:("Bessemer","Open-hearth"),("(c)Air","Scrap iron"):}`

ANSWER :D
Discussion
10.

In the following reaction C_(2)H_(5)OC_(2)H_(5) + 4[H] overset("red " P+HI)to 2X + H_(2)O, X is

Answer»

Ethane
Ethylene
Butane
Propane

Solution :`C_(2)H_(5)OC_(2)H_(5)underset("CLEAVAGE of ethers")OVERSET("red" P//HI)to 2C_(2)H_(5)Iunderset("reduction")overset("red" P//HI)to underset("Ethane")(2C_(2)H_(6))`
Discussion
11.

In the following reaction C_2H_6C(CH_3)(C_6H_5)Br

Answer»

`C_6H_5CH_3`
`C_6H_5CH_2CH_2C_6H_5`
`C_6H_5CH_2OCH_2C_6H_5`
`C_6H_5CH_2OH`

Solution :grignard reagent given HYDROCARBON with ACTIVE hydrogen containing COMPOUND. the product will be toluene
Discussion
12.

In the following reaction C_2H_5OC_2H_5+4[H]overset(Red P+HI)to 2X+H_2O X is

Answer»

Ethane
Ethtylene
BUTANE
Porpane.

SOLUTION :`CH_3CH_2-O-CH_2OH_3+4[H]overset(H-I+P)UNDERSET(DELTA)to2CH_3CH_2-H+H_2O`
Discussion
13.

In the Bayer's process of purification of red bauxtile leaching agent is

Answer»

NaOH
`Na_(2)CO_(3)`
NaCN
KCN

Answer :1
Discussion
14.

In the following reaction, C_(2)H_(5)OC_(2)H_(5)+4H overset("Red "P+HI)to 2X+H_(2)O X is

Answer»

ethane
ethylene
butane
propane

Solution :`C_(2)H_(5)OC_(2)H_(5) underset(("Cleavage"))overset("(HI (excess)")to 2C_(2)H_(5)I underset(("Reduction"))overset("RED P+HI")to underset("Ethane")(2C_(2)H_(6))`
Discussion
15.

In the balanced equation - [Zn+H^(+)+NO_(3)^(-)rarr NH_(4)^(-) rarr NH_(4)^(+) +Zn^(+2)+H_(2)O] coefficient of NH_(4)^(+) is :-

Answer»

4
3
2
1

Answer :D
Discussion
16.

In the following reaction, C is CH_(3) - CH = CH_(2) overset(HI)(to) A overset(KCN)(to) B overset(H_(2)O//H^(+))(to) C

Answer»

`CH_(3) CH_(2) COOH`
`CH_(3) - CH_(2) - CH_(3)`
`CH_(3)OH`
`CH_(3) UNDERSET(CH_(3))underset(|)(C)HCOOH`

SOLUTION :
Discussion
17.

In the Bayer's process of purification of red hauxite the leaching agent is

Answer»

NAOH
`Na_2 CO_3`
`NACN `
`KCN`

ANSWER :A
Discussion
18.

In the following reaction C_2H_5OC_2H_5+ 4[H] overset( "Red" P+ HI) to 2X +H_2O, Xis

Answer»

ETHANE
ETHYLENE
BUTANE
PROPANE

ANSWER :A
Discussion
19.

In the following reaction, B is ltBrgt A overset("Bromination")to B overset(NaNO_(2)//HCl)toCunderset(C_(2)H_(5)OH)overset("Boiling")tosym-tribromobenzene

Answer»

SALICYCLIC acid
benzoic acid
phenol
2,4,6-tribromoaniline.

Solution :
Discussion
20.

In the Bacyer's process, the leaching of alumina is done by using

Answer»

`Na_(2)CO_(3)`
`NaOH`
`SiO_(2)`
CaO

Solution :In Baeyer.s process, POWERED ORE of alumina (BAUXITE) is heated with conc. NaOH.
`Al_(2)O_(3)+2NaOH+3H_(2)Orarr 2Na[Al(OH)_(4)]`
`2Na[Al(OH)_(4)]+2CO_(2)rarrAl_(2)O_(3).xH_(2)O+2NaHCO_(3)`
`Al_(2)O_(3).xH_(2)O overset(1470K)rarr Al_(2)O_(3)+xH_(2)O`
Discussion
21.

in thefollowingreaction "Aldeyde +ALcohol "overset( HCl) to " Acetal " {:("Aldehyde ","Alcohol"),(HCHO,""^(t)BuOH),(CH_(3)CHO,MeOH):} the bestcombination is :

Answer»

HCHO and MEOH
HCHO and BuOH
`CH_3CHO and MeOH`
`CH_3CHO and BuOH`

ANSWER :A
Discussion
22.

In the balance chemical equation : IO_(3)^(-)aI^(-)+bH^(+)tocH_(2)O+dI_(2)a,b,c and d respectively correspond to

Answer»

5,6,3,3
5,3,6,3
3,5,3,6
5,6,5,5

Answer :A
Discussion
23.

In the Avogadro's number 6.023xx10^(23) the number of significant figures will be:

Answer»


ANSWER :4
Discussion
24.

In the following reaction, A+B A and B respectively are :

Answer»




ANSWER :C
Discussion
25.

In the Auto oxidation taking place in Bessemer converter during the extraction of copper. The change in oxidation state of sulphur in this process is

Answer»


SOLUTION :`S^(-2) to OVERSET(+4)(S) O_(2):.` CHANGE in oxidation STATE `=4-(-2)=+6`
Discussion
26.

In the atmosphere, carbon dioxide is found in two forms, i.e., .^(12)CO_(2) and .^(14)CO_(2). Plants absorb CO_(2) during photosynthesis. In presence of chlorophyll, plants synthesise glucose. 6 CO_(2) + 6 H_(2) O to overset(hv)(to) C_(6)H_(12)O_(6) + 6O_(2) uarr Half life of .^(14)C is 5760 years. The analysis of wooden artifacts for .^(14)C and .^(12)C gives useful information for deermination of its age. all living organisms, because of their constant exchange of CO_(2) with the surrounding have the same ratio of .^(14)C to .^(12)C, i.e., 1.3 xx 10^(-12). When an organism dies, the .^(14)C in it keeps on decaying as follows: ._(6)^(14)C to ._(7)^(14)N + ._(-1)^(0)e + Energy Thus, the ratio .^(14)C//^(12)C decrease with the passage of time. we can be used to date anything made of organic matter, e.g., bone, skeleton, wood, etc. Using carbon dating material have been dated to about 50,000 years with accuracy. A piece of wood from an archaeological source shows a .^(14)C activity which is 60% of the activity found in fresh wood today. The age of archaeological sample will be:

Answer»

4246 yrs
4624 yrs
4628 yrs
6248 yrs

Answer :a
Discussion
27.

In the following reaction : [AI](H_(2)O)_(6)]^(3)+H_(2)O hArr H_(3)O+[AI(H_(2)O)_(5)OH]^(+2)

Answer»

A is an acid, B is a base
A is a base, B is an acid
C is CONJUGATE acid of B and D is conjugate base of A
C is conjugate base of B and D conjugate acid of A

Answer :a,c
Discussion
28.

In the atomic spectrum of hydrogen the series of lines observed in the visible region is:

Answer»

BALMER series
Paschen series
Bracket series
Lyman series

Answer :A
Discussion
29.

In the following reaction: (AAK_MCP_37_NEET_CHE_E37_013_Q01) The major product, P is

Answer»


`(AAK_MCP_37_NEET_CHE_E37_013_A01)`

ANSWER :B
Discussion
30.

In the atmosphere, carbon dioxide is found in two forms, i.e., .^(12)CO_(2) and .^(14)CO_(2). Plants absorb CO_(2) during photosynthesis. In presence of chlorophyll, plants synthesise glucose. 6 CO_(2) + 6 H_(2) O to overset(hv)(to) C_(6)H_(12)O_(6) + 6O_(2) uarr Half life of .^(14)C is 5760 years. The analysis of wooden artifacts for .^(14)C and .^(12)C gives useful information for deermination of its age. all living organisms, because of their constant exchange of CO_(2) with the surrounding have the same ratio of .^(14)C to .^(12)C, i.e., 1.3 xx 10^(-12). When an organism dies, the .^(14)C in it keeps on decaying as follows: ._(6)^(14)C to ._(7)^(14)N + ._(-1)^(0)e + Energy Thus, the ratio .^(14)C//^(12)C decrease with the passage of time. we can be used to date anything made of organic matter, e.g., bone, skeleton, wood, etc. Using carbon dating material have been dated to about 50,000 years with accuracy. A sample of ancient wooden boat is found to undergo 9 dpm g^(-1) of .^(14)C What is the approximate age of the boat? The rate of disintegration of wood recently cut down is 15 dpm g^(-1) of .^(14)C

Answer»

4246.5 years
5384 yrs
4628 yrs
2684 yrs

Answer :a
Discussion
31.

In the following reaction A and B, respectively are Aoverset"HBr"to C_2H_5BroversetB to A

Answer»

`C_2H_4, ALC. KOH//Delta`
`C_2H_5Cl, AQ KOH//Delta`
`CH_3OH, aq. KOH//Delta`
`C_2H_2, PBr_3`

SOLUTION :`C_2H_4 OVERSET"HBR"to C_2H_5Br undersetDeltaoverset"alc.KOH"to C_2H_4`
Discussion
32.

In the atmosphere, carbon dioxide is found in two forms, i.e., .^(12)CO_(2) and .^(14)CO_(2). Plants absorb CO_(2) during photosynthesis. In presence of chlorophyll, plants synthesise glucose. 6 CO_(2) + 6 H_(2) O to overset(hv)(to) C_(6)H_(12)O_(6) + 6O_(2) uarr Half life of .^(14)C is 5760 years. The analysis of wooden artifacts for .^(14)C and .^(12)C gives useful information for deermination of its age. all living organisms, because of their constant exchange of CO_(2) with the surrounding have the same ratio of .^(14)C to .^(12)C, i.e., 1.3 xx 10^(-12). When an organism dies, the .^(14)C in it keeps on decaying as follows: ._(6)^(14)C to ._(7)^(14)N + ._(-1)^(0)e + Energy Thus, the ratio .^(14)C//^(12)C decrease with the passage of time. we can be used to date anything made of organic matter, e.g., bone, skeleton, wood, etc. Using carbon dating material have been dated to about 50,000 years with accuracy. .^(14)C exists in atmosphere due to

Answer»

conversion of `.^(12)C` to `.^(14)C`
Combustion of fossil fuel
bombardement of atmosphere nitrogen by COSMIC RAY neutrons
none of the above

Answer :c
Discussion
33.

In the following reaction X and Y respectively CH_3 COOH + NH_3 to X underset(Delta)to Y + H_2 O

Answer»

`CH_3CONH_2 , CH_4`
`CH_3COONH_4, CH_3 CONH_2`
`CH_3 CONH_2, CH_3 COOH`
`CH_3 NH_2, CH_3 CONH_2`

ANSWER :B
Discussion
34.

In the atmosphere, carbon dioxide is found in two forms, i.e., .^(12)CO_(2) and .^(14)CO_(2). Plants absorb CO_(2) during photosynthesis. In presence of chlorophyll, plants synthesise glucose. 6 CO_(2) + 6 H_(2) O to overset(hv)(to) C_(6)H_(12)O_(6) + 6O_(2) uarr Half life of .^(14)C is 5760 years. The analysis of wooden artifacts for .^(14)C and .^(12)C gives useful information for deermination of its age. all living organisms, because of their constant exchange of CO_(2) with the surrounding have the same ratio of .^(14)C to .^(12)C, i.e., 1.3 xx 10^(-12). When an organism dies, the .^(14)C in it keeps on decaying as follows: ._(6)^(14)C to ._(7)^(14)N + ._(-1)^(0)e + Energy Thus, the ratio .^(14)C//^(12)C decrease with the passage of time. we can be used to date anything made of organic matter, e.g., bone, skeleton, wood, etc. Using carbon dating material have been dated to about 50,000 years with accuracy. In the process of photosythesis, O_(2) gas is released form:

Answer»

`CO_(2)`
`H_(2)O`
both `H_(2)O` and `CO_(2)`
MECHANISM is not confirmed

Answer :B
Discussion
35.

In the following reaction, 3Br_(2) + 6CO_(3)^(2-) + H_(2)O to 5Br^(-) + BrO_(3)^(-) + 6HCO_(3)^(-)

Answer»


Solution :`OVERSET(0)(3Br_(2)) 6CO_(3)^(2-) + H_(2)O to overset(-1)(5Br^(-)) + overset(+5)(BrO_(3)^(-)) +6HCO_(3) `. In this REACTION bromine is oxidised as WELL as reduced. It is an example of disproportionation reaction
Discussion
36.

In the atmosphere N_2 is present as element with O_2 because

Answer»

`N_2` is more REACTIVE
`N_2` is INERT
`N_2` does not react with `O_2`
`N_2` and `O_2` requires high temperature to OVERCOME the activation energy BARRIER and react

Answer :B
Discussion
37.

In the artificial transmutation of elements, Alchemists was interested to convert basic metals like iron into precious metals like gold. A number of subatomic particles was used as projectiles to hit the nuclei after accelerating these particles in cyclotron. The ejectiles were also generally some subatomic particles or in some cases, only gamma-radiation were emitted. These nuclear reactions are generally represented by Bethe's notation. In certain cases it is observed that artificial transmutation of a stable nucleus gives a radioisotope which disintegrates by itself like a natural radioactive element. The phenomenon is called induced radioactivity. Which one of the following is not an example of induced radioactivity

Answer»

`{:(._(2)^(4) He +,._(12)^(24)Mg rarr ._(14)^(27)Si + ._(0)n^(1)),(,._(14)^(27)Si rarr ._(13)^(27)Al + ._(+1)e^(0)):}`
`{:(._(1)^(1)H +,._(6)^(12)C rarr ._(7)^(13)N),(,._(7)^(13)N rarr ._(6)^(13)C + ._(+1) e^(0)):}`
`{:(._(1)^(2)D +,._(11)^(23)Na rarr ._(11)^(23)Na + ._(1)^(1)H),(,._(11)^(24)Na rarr ._(12)^(24)Mg + ._(-1) e^(0)):}`
`{:(._(92)^(238)U +,._(0)n^(1) rarr ._(92)^(239)U),(,._(92)^(239)U rarr ._(93)^(239)Np + ._(-1)e^(0)):}`

Solution :`U - 238` is not a stable isotope. Induced activity implies converting a stable isotope into a radioactive isotope
Discussion
38.

In the following reaction 2X +B_(2)H_(6) to [BH_(2)(X)_(2)]^(+) [BH_(4)]^(-) then X will be : -

Answer»

`NH_(3)`
`CH_(3)NH_(2)`
`NaH`
All of these

Solution :When `X=H^(-), NH_(3), CH_(3)NH_(2)` then `[BH_(2)(X)_(2)]^(+) [BH_(4)]^(-)`
if `X=CO`,THF then `2[BH_(3) LARR X]`
Discussion
39.

In the following reaction 2CH_2=CH_2 +S_2Cl_2 to Prouduct . The Product is

Answer»

MUSTARD GAS
Lewisite
Polythene
Teflon

Solution :`2CH_2=CH_2 +S_2Cl_2 to ` Mustard gas
Discussion
40.

In the assembly as shown below, the potential difference across the plates is 4 volts.A positive particle of charge +4e is projected from the negative plate with an initial kinetic energy of 4ev and the negative particle of charge (-2e) is projected from the positive plate.Both the particles reach point 'A' with zero kinetic energy.Find the initial kinetic energy of the negative particle in eV.

Answer»

Solution :For the positive particle , applying energy CONSERVATION initially and at a POINT A
`K.E._1+P.E._1=K.E._1+P.E._1`
`implies 4eV+(+4E)(0V)=0+(+4e)(x"VOLT") " " (x="potential at point A")`
`implies x=1` volt
Now applying energy conservation for the negative particle at point 'A' and initially
`implies K.E._1+(-2e)(4V)=0+(-2e)(1"volt")`
`K.E._1-8eV=-2eV`
`implies K.E._1=6eV`
Discussion
41.

In the following radioactive decay : ""_(92)X^(232)to_(89)Y^(220) how many alpha and beta-particles are ejected?

Answer»

`3alpha` and `3beta`
`5alpha` and `3beta`
`3alpha` and `5beta`
`5alpha` and `5beta`

ANSWER :A
Discussion
42.

In the artificial transmutation of elements, Alchemists was interested to convert basic metals like iron into precious metals like gold. A number of subatomic particles was used as projectiles to hit the nuclei after accelerating these particles in cyclotron. The ejectiles were also generally some subatomic particles or in some cases, only gamma-radiation were emitted. These nuclear reactions are generally represented by Bethe's notation. In certain cases it is observed that artificial transmutation of a stable nucleus gives a radioisotope which disintegrates by itself like a natural radioactive element. The phenomenon is called induced radioactivity. Which one of the following notations shows the product incorrectly

Answer»

`._(96)Cm^(242) (alpha, 2n) ._(97)Bk^(243)`
`._(5)B^(10) (alpha, N) ._(7)N^(13)`
`._(7)N^(14) (n, p) ._(6)C^(14)`
`._(14)Si^(28) (d, n) ._(15)P^(29)`

Solution :In (a), Z and A are not balanced
Discussion
43.

In the following questions, a statement of assertion is followed by a statement of reason. Mark the Correct choice as: Assertion: The order of basicity of amnines in the gaseous phase follows the order : 3^(@)" amines" gt 2^(@)" amines"gt 1^(@)gt" amines". Reason: Amines have an unshared pair of electrons on nitrogen atom due to which they behave as lewis abse.

Answer»

If both ASSERTION and REASON are true and reason in the CORRECT explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false
If both assertion and reason are false
Discussion
44.

In the artificial transmutation of elements, Alchemists was interested to convert basic metals like iron into precious metals like gold. A number of subatomic particles was used as projectiles to hit the nuclei after accelerating these particles in cyclotron. The ejectiles were also generally some subatomic particles or in some cases, only gamma-radiation were emitted. These nuclear reactions are generally represented by Bethe's notation. In certain cases it is observed that artificial transmutation of a stable nucleus gives a radioisotope which disintegrates by itself like a natural radioactive element. The phenomenon is called induced radioactivity. The following nuclear transmutation ._(11)Na^(23) + ._(1)H^(1) rarr ._(12)Mg^(23) + ._(0)n^(1) belongs to

Answer»

<P>(n,p) Type
(p,n) Type
`(alpha, n)` Type
(d, p) Type

Solution :It is (p, n) TYPES as p is bombarding PARTICLE and n is EMITTED
Discussion
45.

In the following questions, a statement of assertion (A) is following by a statement of reason (R ) A : when chloroform is obtained from bleaching powder and ethanol then chlorine acts as oxidising agent only. R : It oxidises ethanol into acetic acid.

Answer»

If both ASSERTION & Reason are the reason is the correct explanation of the assertion, then mark (1).
If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark(2).
If Assertion is true STATEMENT but Reason is false , then mark (3)
If both Assertion and Reason are false statements, then mark (4)

Answer :D
Discussion
46.

In the artificial transmutation of elements, Alchemists was interested to convert basic metals like iron into precious metals like gold. A number of subatomic particles was used as projectiles to hit the nuclei after accelerating these particles in cyclotron. The ejectiles were also generally some subatomic particles or in some cases, only gamma-radiation were emitted. These nuclear reactions are generally represented by Bethe's notation. In certain cases it is observed that artificial transmutation of a stable nucleus gives a radioisotope which disintegrates by itself like a natural radioactive element. The phenomenon is called induced radioactivity. What is X in the following nuclear reaction ._(7)^(14)N + ._(1)^(1)H rarr ._(8)^(15)O + 'X'

Answer»

`._(0)N^(1)`
`._(-1)E^(0)`
`._(+1)e^(0)`
`GAMMA`

Solution :On BALANCING Z and A, Z is `gamma`
Discussion
47.

In the following questions, a statement of assertion (A) is following by a statement of reason (R ) A: In benzyne the hybridisation of triply bonded carbon is SP^(2) . R: The second pi-bondis formed by sp^(2) hybrid orbital .

Answer»

If both Assertion & Reason are the reason is the CORRECT explanation of the assertion, then mark (1).
If both Assertion & Reason are TRUE but the reason is not the correct explanation of the assertion, then mark(2).
If Assertion is true STATEMENT but Reason is false , then mark (3)
If both Assertion and Reason are false STATEMENTS, then mark (4)

ANSWER :A
Discussion
48.

In the following questions, a statement of assertion (A) is following by a statement of reason (R ) A : The number oif optically active isomers of tartaric acid contains two asymmetric carbon .

Answer»

If both Assertion & Reason are the reason is the correct explanation of the assertion, then mark (1).
If both Assertion & Reason are TRUE but the reason is not the correct explanation of the assertion, then mark(2).
If Assertion is true STATEMENT but Reason is false , then mark (3)
If both Assertion and Reason are false STATEMENTS, then mark (4)

Answer :B
Discussion
49.

In the following questions, a statement of assertion (A) is followed by a statement of reason (R ) A : O_(2) is paramagnetic . R : N_(2) is paramagnetic .

Answer»

If both ASSERTION & Reason are TRUE and the reason is the correct EXPLANATION of the assertion, then mark (1)
If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
If Assertion is true STATEMENT but Reason is false, then mark (3)
If both Assertion and Reason are false statements , then mark (4).

Answer :C
Discussion
50.

In the Arrhenius plot of ln k vs (1)/(T) , a linear plot is obtained with a slope of -2 xx 10^(4) K . The energy of activationof the reaction (in kJ "mole"^(-1)) is (R value is 8.3 JK^(-1) mol^(-1))

Answer»

83
166
249
332

Solution :`k =AE^(-E_(a) //RT)`
ln k= ln A - `E_(a)//RT`For ln k vs 1/T
ln A = INTERCEPT
`-E_(a)//R` = slope = `-2 xx 10^(4)` K
`E_(a) = R xx 2 xx 10^(4) K = 8.3 xx 2 xx 10^(4) J "MOL"^(-1)`
`16.6 xx 10^(4) J mol^(-1)` or 166 kJ `mol^(-1)`
Discussion