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.

Point out the wrong statement in relation to enthalpy

Answer»

It is a state function
It is an intensive property
It is independent of the PATH followed for the change
Its VALUE depends upon the AMOUNT of SUBSTANCE in the system

Solution :Enthalpy is an extensive property.
Discussion
2.

Point out wrong statement about protein

Answer»

They are nitrogenous organic compound with high MOLECULAR weight
On HYDROLYSIS by enzymes give `alpha`-L-amino ACIDS
Many of them are enzymes
They do not contain POLYPEPTIDE CHAIN

Answer :D
Discussion
3.

Point out the wrong statement, in a given period of the periodic table, the s-block elemtns has, in general, a lower value of

Answer»

electronegativity
Atomic radius
ionization ENERGY
ELECTRON affinity

SOLUTION :In any period, s-block element have the largest SIZE.
Discussion
4.

Point out the wrong statement In a given period of the periodic table the s-block element has, in general, a lower value of

Answer»

IONISATION energy
Electronegativity
ATOMIC radius
Electron affinity

Answer :C
Discussion
5.

Point out the non - existing molecule out of the following ?

Answer»

`CBr_(4)`
`XeF_(4)`
`SF_(6)`
`NF_(5)`

Solution :`NF_(5)`does not exist because NITROGEN atom does not have VACANT d-orbitals in its valence shell. Therefore, it cannot extend its octet.
Discussion
6.

Point out the incorrect statement regarding Be (Group IIA )

Answer»

It forms an ionic carbide
Its CARBONATE decomposes on heating
Its HALIDES are COVALENT
It is easily ATTACKED by water

Solution :Be does not react with water.
Discussion
7.

Point out the wrong statement: For a first order reaction

Answer»

time for half-change (`t_(1 // 2)`) is independent of initial concentration
change in the concentration unit does not change the RATE constant (k)
time for half-change rate constant =0.693
the unit of k is `"MOLE"^(-1)"MIN"^(-1)`

SOLUTION :Unit of k for Ist order reaction is `"(time)"^(-1)`
Discussion
8.

Point out the incorrect statement:

Answer»

RATE law is an EXPERIMENTAL value
Law of mass ACTION is a THEORETICAL PROPOSAL
Rate law is more informative .than law of mass action for developing mechanism
Rate law is always different from, the expression of law of mass action

Answer :D
Discussion
9.

Pointout theflase statement .

Answer»

Colloidal sols are homogeneous
COLLIODS CARRY + ve or - ve charges
ColloidsshowTyndall effect.
The SIZE rangeof colloidal particleis `10-1000 Å`

SOLUTION :Colloidal sols are heterogeneous in nature.
Discussion
10.

Point out the false statment .

Answer»

colloidal sols are homogeneous.
Colloids CARRY + ve or -ve charges
Colloids SHOW Tyndall effect.
The size RANGE of colloidal PARTICLES is 10-1000 Å

Solution :Collaoidal sols are heterogeneous is NATURE.
Discussion
11.

Point out the false statement -

Answer»

Colloidal sols are homogenous
Colloids CARRY +ve or -ve charge
Colloids SHOW TYNDALL effect
The size RANGE of colloidal particles is `10 - 1000A^(@)`

Answer :A
Discussion
12.

Point out the difference between ionic product and solubility product. (ii) The solubility of AgCl in water at 298 K is 1.06 times 10^-5 mole per litre. Calculate is solubility product at this temperature.

Answer»

Solution :
(ii) The solubility equilibrium in the saturated solution is
`AgCl(s) LEFTRIGHTARROW Ag^(+) (aq)+CL^-(-) (aq)`
The solubility of AgCl is `1.06 TIMES 10^-5` MOLE per litre.
`[Ag^(+)(aq)]=1.06 time 10^-5 mol L^-1`
`[Cl^(-) (aq)]=1.06 times 10^-5 mol L^-1`
`K_(sp)=[Ag^+(aq)][Cl^(-) (aq)]`
`=(1.06 times 10^-5 mol L^-1) times (1.06 times 10^-5 mol L^-1)`
`=1.12 times 10^-2 mol^2 L^-2`
Discussion
13.

Point out the dihydroxy diethyl terephthalate .

Answer»




ANSWER :B
Discussion
14.

Point out the difference between addition reactions in alkenes and carbonyl compounds.

Answer»

SOLUTION :
Discussion
15.

Point out the correct statements/s

Answer»

Rate law is an experimental fact whereas law of mass action is a theoretical porposal.
Rate law is always DIFFERENT from the expression of law or mass action.
Rate law is more informative than law of mass action for the development of mechanism
Order of a REACTION is equal to the SUM of powers of concentration terms in the rate law.

Answer :A::C::D
Discussion
16.

Point out the correct statement about proteins:

Answer»

They are nitrogenous ORGANIC COMPOUNDS
of high MOLECULAR weights
They on hydrolysis by ENZYME
GIVE amino acids
Many of them are enzymes
All

Answer :B
Discussion
17.

Point out of the following Incorrect Griganard synthesis.

Answer»




SOLUTION :A, B and D are INCORRECT GRIGNARED SYNTHESIS.
Discussion
18.

Point out of the wrong statement about proteins:

Answer»

They are nitrogenous organic COMPOUNDS of high MOLECULAR mass
They on HYDROLYSIS by ENZYMES give amino acids
Many of themare enzymes
They do not contain POLYPEPTIDE linkages

Answer :D
Discussion
19.

Point out the central ion ligand in the complex K_2[Cd(CN)_4].

Answer»

`CD^+, Cn^(1-)`
`Cd^(2+),Cn^(1-)`
`Cd^(2+), CN^(4-)`
`Cd^(2+), CN^(2-)`

ANSWER :B
Discussion
20.

Point defects are present in

Answer»

IONIC solids
Molecular solids
Amorphous solids
Liquids

Answer :A
Discussion
21.

PMMA is the polymer of:

Answer»

METHYL methacrylate
Methylacrylate
Methacrylate
Ethylacrylate

Answer :A
Discussion
22.

Pentan-3- one does not undergo iodoform reaction. Give reason.

Answer»

Solution :Pentan - 3 - one does not UNDERGO IODOFORM REACTION because it is not a METHYL ketone.
Discussion
23.

Plots showing the variation of the rate constant (k) with temperature (T) are given below. The plot that follows Arrhenius equation is

Answer»




Solution :`k=Ae^(-Ea//RT)=A/(""_eE_a//RT)` Thus, as T decreases, theexponential FACTOR in the DENOMINATOR decreases or `AD^(-E_(a)//RT)` increases. Hence, k increases explonentially as T increases.
Discussion
24.

Plumbo-solvency refers to:

Answer»

Oxidation of lead to lead oxide
Oxidation of lead to red lead
Dissolution of lead in WATER containing are
Making lead WIRES by FORCING heated METAL though a die

Answer :C
Discussion
25.

Plots showing the variation of the rate constant (k) with temperature (T) are given below . The plot that follows Arrhenius equation is

Answer»




SOLUTION :K = `AE^(-Ea//RT)`
So , VARIATION will be
Discussion
26.

Plots showing the variation of the rate constant (k) with temperature (T) are given below. The plot that follows Arrhenius equations is

Answer»




Solution :As PER ARRHENIUS EQUATION `k=Ae^((-E_(a))/(RT))`, the RATE constant increase exponentially with temperature.
Discussion
27.

Plots showing the variation of the rate constant (k) with temperature (T) ar given below. The plot that follows arrhenius equation is

Answer»




ANSWER :A
Discussion
28.

Plot of logx/m against logp is straight line inclined at an angle of 45^@.. When the pressure is 0.5 atm and Freundlich parameter, k is 10, the amount of solute adsorbed per gram of adsorbent will be: (log 5 = 0.6990)

Answer»

1g
2g
3g
5g

Answer :D
Discussion
29.

Plot of Maxwell's distribution of velocities is given below : Whichof the following is correct about this plot ?

Answer»

`f_(1) GT f_(2)`
`V_(1) lt V_(2)`
`T_(1) lt T_(2)`
`T_(1)gtT_(2)`

SOLUTION :In Maxwell'sdistribution of velocities , the curve shifts forward and downward at highertemperature .
`T_(1) gt T_(2)`
`V_(1) gt V_(2)`
`f_(2) gt f_(1)`
Discussion
30.

Plot of "log" x/m against log p is a straight line inclined at an angle of 45^@. When the pressure is 0.5atm and k value is 10, the amount of solute adsorbed per gram of adsorbent will be

Answer»

<P>5GM 
10gm 
1GM 
15gm 

Solution :`"log" x/m = log K + 1/n "log P"`
`tan 45^@ , 1/n = 1 , x/m = K.P.^(1/n) , 10 XX 0.5= 5
Discussion
31.

Plot of log (a- x) vs time t is straight line. This indicates that the reaction is of:

Answer»

SECOND order
First order
Zero order
Third order

Answer :B
Discussion
32.

Plexsi glassis a commercial name of

Answer»

glyptal
polyacrylonitrile
polymethyl methacrylate
polyethyl ACRYLATE

ANSWER :C
Discussion
33.

Plexi glass is

Answer»

`(-CH_2-underset(COOCH_3)underset(|)OVERSET(CH_3)overset(|)C-)_n`
`(-underset(C_6H_5)underset(|)(CH)-CH_2-)_n`
`(-CH_2-underset(COOC_2H_5)underset(|"")(CH)-)_n`
None of these

Answer :A
Discussion
34.

Plexiglass is a commercial name of :

Answer»

GLYPTAL
Polymethyl methacrylate
POLYACRYLONITRILE
Polyethylacrylate

Answer :B
Discussion
35.

Pleasant odours of common fruits is due to:

Answer»

ALCOHOL
Fats
Sugars
Esters

Answer :B
Discussion
36.

Platinum , palladium , iridium , etc are called noble metals because:

Answer»

Alfred Nobel DISCOVERED them
They are inert TOWARDS many common reagents
They are shining , lustors and pleasing to look
They are FOUND in native STATE

Answer :B
Discussion
37.

Platinum, Palladium, Indium, etc. are called noble metals because:

Answer»

Alfred nobel discovered them
They are inert towards MANY COMMON reagents
The are SHINING, LUSTROUS and pleasing to look at
They are FOUND in native state

Answer :B
Discussion
38.

Platinum metal can be dissolved in :

Answer»

Hot concentrated HYDROCHLORIC ACID
Hotconcentrated nitric acid
Hot dilute sulphuric nitric acid
A MIXTURE of hydrochloric and nitric acids

Answer :D
Discussion
39.

Platinum is used as a catalyst in :

Answer»

OXIDATION of AMMONIA to from NITRIC acid
Hardening of olis
Production of SYNTHETIC rubber
Synthesis of methanol

Answer :A
Discussion
40.

Platinum is not used as a catalyst in the :

Answer»

Oxidation of `CH_3OH` to `HCHO`
Oxidation of `SO_2` to `SO_3`
COMBINATION of `H_2` and `I_2` to FORM `HI`
Synthesis of `NH_3` from `N_2` and `H_2`

Answer :D
Discussion
41.

Platinum dissolves in aqua regia to form

Answer»

`PtCl_(4)`
`H_(2)PtCl_(6)`
`PT(NO_(3))_(4)`
`[PtCl_(2)(NO_(3))_(2)]`

Solution :Pt + AQUA REGIA (conc. HCl + conc. `HNO_(3)`) `rarr H_(2)[PtCl_(6)]`.
Discussion
42.

'Platinum black' is -

Answer»

a mixture of Pt and `MnO_(2)`
the black powder obtained when `PtCl_(4)` is reduced by SODIUM formate
a black coating on Pt
None of the above

ANSWER :B
Discussion
43.

Platinum black is :

Answer»

Platinum metal MIXED with `MnO_2`
Velvety black POWDER obtained by reduction of platinum TETRACHLORIDE with GLUCOSE or sodium formate
Platinum metal coated with black colour
None of these

Answer :B
Discussion
44.

Platinised asbestos helps in the formation of SO_(3) from SO_(2) and O_(2). But, if even a small amount of As_(2)O_(3) is present the platinised asbestos does not help in the formation of SO_(3), As_(2)O_(3) acts here as a//an.

Answer»

CATALYTIC promoter
catalytic poison
dehyrating agent
drying agent .

Solution :The presence of traces of `As_(2)O_(3)` in the reacting GASES reduces the activity of plantinised asbestos which is used as catalyst in CONTACT process.
Discussion
45.

Platinised asbestos used as a catalyst in manufacture of H_(2)SO_(4) is an example of

Answer»

HOMOGENOUS CATALYSIS
HETEROGENOUS catalysis
Induced catalysis
Auto catalysis

Answer :B
Discussion
46.

Platelet aggregation is inhibited by

Answer»

BORIC ACID
aspirin
bithional
sodium CARBONATE

ANSWER :B
Discussion
47.

Plat of Maxwell.s distribution of velocities is gives below : Which of the following is correct about this plot ?

Answer»

`V_1 lt V_2`
`T_1 gt T_2`
`f_1 gt f_2`
`T_1 lt T_2`

Solution :In Maxwell.s distrubution of VELOCITIES, the curve shifts forward and DOWNWARD at higher TEMPERATURE.
`T_1 gt T_2`
`V_1 gt V_2`
` f_2 gt f_1`
Discussion
48.

Plastic is :

Answer»

Natural POLYMER
Semi-SYNTHETIC polymer
Synthetic polymer
None of these

Answer :C
Discussion
49.

Plaster of paris of

Answer»

`CaSO_(4)2.H_(2)O`
`CaSO_(4).3H_(2)O`
`CaSO_(4).H_(2)O`
`CaSO_(4).1/2H_(2)O`

Solution :`CaSO_(4).1/2H_(2)O` or `(CaSO_(4))_(2).H_(2)O`
Discussion
50.

Plaster of paris is

Answer»

`(CaSO_(4))_(2).H_(2)O`
`CaSO_(4).2H_(2)O`
`CaSO_(4).H_(2)O`
`CaSO_(4).5H_(2)O`

Answer :A
Discussion