JEE Advanced Test- 12 - JEE MCQ

# JEE Advanced Test- 12 - JEE MCQ

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## 72 Questions MCQ Test Mock Tests for JEE Main and Advanced 2024 - JEE Advanced Test- 12

JEE Advanced Test- 12 for JEE 2024 is part of Mock Tests for JEE Main and Advanced 2024 preparation. The JEE Advanced Test- 12 questions and answers have been prepared according to the JEE exam syllabus.The JEE Advanced Test- 12 MCQs are made for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for JEE Advanced Test- 12 below.
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JEE Advanced Test- 12 - Question 1

### A cobalt (atomic no. = 27) target is bombarded with electrons, and the wavelengths of its characteristic x-ray spectrum are measured. A second weak characteristic spectrum is also found, due to an impurity in the target. The wavelengths of the Kα lines are 225.0 pm (cobalt) and 100.0 pm (impurity).  Atomic number of the impurity is (take b = 1)

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JEE Advanced Test- 12 - Question 2

### A hydrogen atom is in the 4th excited state, then:

Detailed Solution for JEE Advanced Test- 12 - Question 2

The hydrogen atom is in n = 5 state.
Max. no of possible photons = 4
To emit photon in ultra violet region, it must jump to n = 1, because only Lyman series lies in u.v. region. Once
it jumps to n = 1 photon, it reaches to its ground state and no more photons can be emitted. So only one photon
in u. v. range can be emitted.
If H atom emits a photon and then another photon of Balmer series, option D will be correct.

JEE Advanced Test- 12 - Question 3

### In the photoelectric experiment, if we use a monochromatic light, the I - V curve is as shown. If work function of the metal is 2eV, estimate the power of light used. (Assume efficiency of photo emission = 10–3%, i.e. number of photoelectrons emitted are 10–3% of number of photons incident on metal.)

Detailed Solution for JEE Advanced Test- 12 - Question 3

JEE Advanced Test- 12 - Question 4

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Protostele is the simplest type of stele.
Reason (R): Siphonostele has pith in the centre.

JEE Advanced Test- 12 - Question 5

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JEE Advanced Test- 12 - Question 6

A 10 μ F capacitor and a 20 μ F capacitor are connected in series across 200 V supply line. The charged capacitors are then disconnected from the line and reconnected with their positive plates together and negative plates together and no external voltage is applied. What is the potential difference across each capacitor?

JEE Advanced Test- 12 - Question 7

A metallic charged ring is placed in a uniform magnetic field with its plane perpendicular to the field. If the magnitude of field starts increasing with time, then :

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JEE Advanced Test- 12 - Question 8

An electron in hydrogen atom makes a transition n1 → n2 where n1 and n2 are principal quantum numbers of the two states. Assuming Bohr's model to be valid the time period of the electron in the initial state is eight times that in the final state. The possible values of n1 and n2 are

*Multiple options can be correct
JEE Advanced Test- 12 - Question 9

The decay constant of a radio active substance is 0.173 (years)-1. Therefore :

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*Multiple options can be correct
JEE Advanced Test- 12 - Question 10

In an x-ray tube the voltage applied is 20 kV. The energy required to remove an electron from L shell is 19.9 keV. In the x-rays emitted by the tube (Use hc = 12420 eVÅ)

Detailed Solution for JEE Advanced Test- 12 - Question 10

*Multiple options can be correct
JEE Advanced Test- 12 - Question 11

When a hydrogen atom  is excited from ground  state to first excited state then

Detailed Solution for JEE Advanced Test- 12 - Question 11

JEE Advanced Test- 12 - Question 12

Consider the following four electrodes,

P = Cu2+ (0.0001 M) | Cu(s)

Q = Cu2+ (0.1 M) | Cu(s)

R = Cu2+ (0.01 M) | Cu(s)

S = Cu2+ (0.001 M) | Cu(s)

If the standard reduction potential of Cu2+/Cu is +0.34 V, the reduction potentials in volts of the above electrodes follow the order

JEE Advanced Test- 12 - Question 13

Statement-1 : In process of photoelectric emission, all emitted electrons donot have same kinetic energy.

Statement-2 : If radiation falling on photosensitive surface of a metal consists of different wavelengths, then energy acquired by electrons absorbing photons of different wavelengths shall be different.

Detailed Solution for JEE Advanced Test- 12 - Question 13

Both statements I and II are true; but even if radiation of single wavelength is incident on photosensitive surface, electrons of different KE will be emitted.

JEE Advanced Test- 12 - Question 14

Statement-1 : When a beam of highly energetic neutrons is incident on a tungsten target, no X-rays will be produced.

Statement-2 : Neutrons do not exert any electrostatic force on electrons or nucleus of an atom.

Detailed Solution for JEE Advanced Test- 12 - Question 14

Neutron will knock out electrons in target leading to production of characteristic X-ray. Hence statement-1 is false.

JEE Advanced Test- 12 - Question 15

Statement-1 : When cathode rays (accelerated with high voltage 10 kVolts) strikes a hard metallic surface, highly penetrating radiation is obtained.

Statement-2 : Due to conversion of electron's kinetic energy into photon's energy, the shortest wavelength limit of X-rays produced is inversely proportional to the accelerating voltage.

Detailed Solution for JEE Advanced Test- 12 - Question 15

JEE Advanced Test- 12 - Question 16

Statement-1 : Heavy nuclides tend to have more number of neutrons than protons.

Statement-2 : In heavy nuclei, as there is coloumbic repulsion between protons, so excess of neutrons are preferable.

Detailed Solution for JEE Advanced Test- 12 - Question 16

Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1

JEE Advanced Test- 12 - Question 17

An experimental setup of verification of photoelectric effect is shown in the diagram. The voltage across the electrodes is measured with the help of an ideal voltmeter and which can be varied by moving jockey ‘J’ on the potentiometer wire. The battery used in potentiometer circuit is of 20 V and its internal resistance is 2?. The resistance of 100 cm long potentiometer wire is 8?.

The photocurrent is measured with the help of an ideal ammeter. Two plates of potassium oxide of area 50 cm2 at separation 0.5 mm are used in the vacuum tube. Photo current in the circuit is very small so we can treat potentiometer circuit an independent circuit.

The wavelengths of various colours is as follows :

Q. The number of electrons appeared on the surface of the cathode plate, when the jockey is connected at the end ‘P’ of the potentiometer wire. Assume that no radiation is falling on the plates.

Detailed Solution for JEE Advanced Test- 12 - Question 17

JEE Advanced Test- 12 - Question 18

An experimental setup of verification of photoelectric effect is shown in the diagram. The voltage across the electrodes is measured with the help of an ideal voltmeter and which can be varied by moving jockey ‘J’ on the potentiometer wire. The battery used in potentiometer circuit is of 20 V and its internal resistance is 2?. The resistance of 100 cm long potentiometer wire is 8?.

The photocurrent is measured with the help of an ideal ammeter. Two plates of potassium oxide of area 50 cm2 at separation 0.5 mm are used in the vacuum tube. Photo current in the circuit is very small so we can treat potentiometer circuit an independent circuit.

The wavelengths of various colours is as follows :

Q. It is found that ammeter current remains unchanged (2μA) even when the jockey is moved from the end ‘P’ to the middle point of the potentiometer wire. Assuming all the incident photons eject electron and the power of the light incident is 4 × 10–6 W. Then the colour of the incident light is

Detailed Solution for JEE Advanced Test- 12 - Question 18

JEE Advanced Test- 12 - Question 19

An experimental setup of verification of photoelectric effect is shown in the diagram. The voltage across the electrodes is measured with the help of an ideal voltmeter and which can be varied by moving jockey ‘J’ on the potentiometer wire. The battery used in potentiometer circuit is of 20 V and its internal resistance is 2?. The resistance of 100 cm long potentiometer wire is 8?.

The photocurrent is measured with the help of an ideal ammeter. Two plates of potassium oxide of area 50 cm2 at separation 0.5 mm are used in the vacuum tube. Photo current in the circuit is very small so we can treat potentiometer circuit an independent circuit.

The wavelengths of various colours is as follows :

Q. When other light falls on the anode plate the ammeter reading remains zero till,  jockey is moved from the end P to the middle point of the wire PQ. Thereafter the deflection is recorded in the ammeter. The maximum kinetic energy of the emitted electron is

Detailed Solution for JEE Advanced Test- 12 - Question 19

JEE Advanced Test- 12 - Question 20

Consider the reaction,

Cl2 (aq) + H2S (aq) → S(s) + 2H+(aq) + 2Cl(aq)

The rate equation for this reaction is, rate = k [Cl2] [H2S]

Which of these mechanisms is/are consistent with this rate equation?

(a).  Cl2 + H2S → H+ + Cl + Cl+ + HS (slow)

Cl+ + HS → H+ + Cl + S (fast)

(b).  H2 H+ + HS (fast equilibrium)

Cl2 + HS → 2Cl + H+ + S (slow)

JEE Advanced Test- 12 - Question 21

The half life period of a first order chemical reaction is 6.93 minutes. The time required for the completion of 99% of the chemical reaction will be (log 2 = 0.301)

JEE Advanced Test- 12 - Question 22

Consider a reaction, aG + bH → Products.

When concentration of both the reactants G and H is doubled, the rate increases by eight times. However, when the concentration of G is doubled keeping the concentration of H fixed, the rate is doubled. The overall order of the reaction is:

JEE Advanced Test- 12 - Question 23

Using Bohr’s model for H–like atom, match the following. Here n = orbit number, Z = nuclear charge, m = mass of electron
Column-I                                                                              Column-II
(A) Due to revolving electron, the magnetic field produced                (p) n–5
at its centre is proportional to

(B) Magnetic moment of revolving electron is proportional to             (q) n

(C) De-Broglie wave length of revolving electron is proportional to      (r) Z3

(D) Areal velocity of revolving electron about nucleus is                    (s) independent of Z
proportional to
(t) m–1

Detailed Solution for JEE Advanced Test- 12 - Question 23

JEE Advanced Test- 12 - Question 24

For a reaction A + B → C + D if the concentration of A is doubled without altering the concentration of B, the rate gets doubled. If the concentration of B is increased by nine times without altering the concentration of A, the rate gets tripled. The order of the reaction is

JEE Advanced Test- 12 - Question 25

When a bio chemical reaction is carried out in laboratory out side the human body in the absence of enzyme, then the rate of reaction obtained is 10–6 times, than activation energy of

reaction in the presence of enzyme is:

JEE Advanced Test- 12 - Question 26

'Spin only' magnetic moment of Ni in [Ni(dmg)2] is same as that found in :

Detailed Solution for JEE Advanced Test- 12 - Question 26

JEE Advanced Test- 12 - Question 27

Which of the following complexes shows ionisation as well as hydrate isomerism ?

Detailed Solution for JEE Advanced Test- 12 - Question 27

Both compounds have same formula, but gives different ions in solution, hence exhibit, ionization isomerism. It also shows hydrate isomerism as shown above because hydrate isomers differ by whether or not a water molecule(s) is / are directly bonded to the metal ion or merely present as free water molecule(s) in the crystal lattice.

JEE Advanced Test- 12 - Question 28

Which of  the following statements is true for the compounds [X], [Y] and [Z] ?

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JEE Advanced Test- 12 - Question 29

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JEE Advanced Test- 12 - Question 30

Maximum number of electrons in a subshell with = 3 and = 4 is

JEE Advanced Test- 12 - Question 31

When Cl2 water in excess is added to a salt solution containing chloroform layer turns pale yellow. Salt contains :

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JEE Advanced Test- 12 - Question 32

A metal nitrate solution reacts with dilute hydrochloric acid to give a white precipitate which is soluble in concentrated potassium chloride. White precipitate on passing of hydrogen sulphide gas is converted into black precipitate. The black precipitate on boiling with hydrogen peroxide (3%) is converted again to a white precipitate which is soluble in ammonium acetate. The cation of the metal nitrate is :

Detailed Solution for JEE Advanced Test- 12 - Question 32

*Multiple options can be correct
JEE Advanced Test- 12 - Question 33

Which of the following statements is(are) true for [Cu(NO2)6]4– and [Fe(H2O)6]3+ ?

Detailed Solution for JEE Advanced Test- 12 - Question 33

*Multiple options can be correct
JEE Advanced Test- 12 - Question 34

KI solution is the reagent for :

Detailed Solution for JEE Advanced Test- 12 - Question 34

*Multiple options can be correct
JEE Advanced Test- 12 - Question 35

The products of the reaction between one mole of XeO3 and two mole of XeF6 is(are) :

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JEE Advanced Test- 12 - Question 36

The energy of an electron in first Bohr orbit of H-atom is –13.6 eV. The possible energy value of electron in the excited state of Li2+ is

JEE Advanced Test- 12 - Question 37

Statement-1 : Cuprous ion (Cu+) is colourless whereas cupric ion (Cu2+) produces blue colour in solution.

Statement-2 : Cuprous ion (Cu+) has unpaired electrons while cupric ion (Cu2+) does not.

Detailed Solution for JEE Advanced Test- 12 - Question 37

Cupric ion produces blue colour in solution due to the presence of unpaired electron (d-d transition) while cuprous ion does not have unpaired electron.

JEE Advanced Test- 12 - Question 38

Statement-1 : In the cyanide process for the extraction of gold and silver from their native ores, the cyanide solution acts as a reducing agent to reduce the gold and silver compounds present in the ores into the metallic states.

Statement-2 : In the extraction of gold and silver, the cyanide solution acts as  complexing reagent in the presence of air and form their respective soluble complexes.

Detailed Solution for JEE Advanced Test- 12 - Question 38

S-1 :  Cyanide solution acts as leaching agent. This dissolves the ores of silver and gold forming soluble complexes. It does not convert ores into directly metallic state. So S-1 is false.

S-2 : True statement.

JEE Advanced Test- 12 - Question 39

Four wires of identical lengths, diameters and material and stretched on a sonometer box. The ratio of their tension is 1: 4: 9: 16. the ratio of their fundamental frequencies is

JEE Advanced Test- 12 - Question 40

A wave is propagating along X-axis and another identical wave is propagating along Y-axis if they superimpose each other, the resultant wave will be

JEE Advanced Test- 12 - Question 41

What is the maximum numbers of electrons that can be associated with the following set of quantum numbers? [NEET 2013]

n = 3, = 1 and m = –1

JEE Advanced Test- 12 - Question 42

In allene (C3H4), the type(s) of hybridisation of the carbon atoms is (are)

JEE Advanced Test- 12 - Question 43

In Bohr series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inner-orbit jumps of the electron for Bohr orbits in an atom of hydrogen?

JEE Advanced Test- 12 - Question 44

An electron is moving in Bohr's fourth orbit. Its de-Broglie wavelength is λ. What is the circumference of the fourth orbit?

JEE Advanced Test- 12 - Question 45

Two particles C and D are in motion. If the wavelength of particle C is 5 x 10-8m. Calculate the wavelength of particle D if its momentum is half of C.

JEE Advanced Test- 12 - Question 46

Which of the following will fail to react with potassium dichromate and dilute sulphuric acid

JEE Advanced Test- 12 - Question 47

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JEE Advanced Test- 12 - Question 48

The oxidation of toluene to benzaldehyde by chromyl chloride is called

JEE Advanced Test- 12 - Question 49

Hydrolysis of ozonide of 1-butene gives

JEE Advanced Test- 12 - Question 50

If adj B = A, |PBQ| = 1 and |P|, |B|, |Q| belongs to set of natural numbers then (Q–1 B P–1)–1 is equal to

Detailed Solution for JEE Advanced Test- 12 - Question 50

JEE Advanced Test- 12 - Question 51

When Cl2 gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from

JEE Advanced Test- 12 - Question 52

Three reactions involving H2PO4are given below

(i) H3PO4 + H2O ® H3O+ + H2PO4-

(ii) H2PO4- + H2O ® HPO42- + H3O+

(iii) H2PO4- + OH- ® H3PO4 + O2-

In which of the above does H2PO4- act as an acid?

JEE Advanced Test- 12 - Question 53

Which one of the following arrangements represents the correct order of least negative to most negative electron gain enthalpy for C, Ca, Al, F and O?

JEE Advanced Test- 12 - Question 54

Roasting of sulphides gives the gas X as a byproduct This is a colorless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic acts as a reducing agent and its acid has never been isolated. The gas X is

JEE Advanced Test- 12 - Question 55

Consider the following reaction

C2H5OH + H2SO4  → Product

Among the following, which one cannot be formed as a product under any conditions?

JEE Advanced Test- 12 - Question 56

In 1L saturated solution of AgCl[KSP(AgCl) = 1.6 × 10–10], 0.1 mol of CuCl [KSP(CuCl) = 1.0 × 10–6] is added.

The resultant concentration of Ag+ in the solution is 1.6 × 10–x. The value of "x" is.

JEE Advanced Test- 12 - Question 57

Solubility product of silver bromide is 5.0 × 10–13. The quantity of potassium bromide (molar mass taken as 120 g mol–1) to be added to 1 litre of 0.05 M solution of silver nitrate to start the precipitation of AgBr is

*Multiple options can be correct
JEE Advanced Test- 12 - Question 58

Suppose m boys and m girls take their seats randomly round a circle. The probability of their sitting is (2mCm )–1 , when

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*Multiple options can be correct
JEE Advanced Test- 12 - Question 59

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*Multiple options can be correct
JEE Advanced Test- 12 - Question 60

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JEE Advanced Test- 12 - Question 61

At 25°C, the solubility product of Mg(OH)2 is 1.0 × 10–11. At which pH, will Mg2+ ions start precipitating in the form of Mg(OH)2 from a

solution of 0.001 M Mg2+ ions?

JEE Advanced Test- 12 - Question 62

Statement 1 : The locus represented by xy + yz = 0 is a pair of perpendicular planes.

Statement 2 : If a1x + b1y + c1z + d1 = 0 and a2x + b2y + c2z + d2 = 0 are perpendicular then a1a2 + b1b2 + c1c2 = 1.

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JEE Advanced Test- 12 - Question 63

In view of the signs of ΔrG° for the following reactions

PbO2 + Pb → 2 PbO, ΔrG° < 0

SnO2 + Sn → 2 SnO, ΔrG° > 0,

Which oxidation states are more characteristic for lead and tin?

JEE Advanced Test- 12 - Question 64

For a particular reversible reaction at temperature T, ΔH and ΔS were found to be both +ve. If Te is the temperature at equilibrium, the reaction would be spontaneous when

JEE Advanced Test- 12 - Question 65

The work done when two mole of an ideal gas is compressed from a volume of 5 m3 to 1 dm3 at 300 K, under a pressure of 100 kPa is

JEE Advanced Test- 12 - Question 66

Among the following sets of reactants which one produces anisole?

JEE Advanced Test- 12 - Question 67

The electrons, identified by quantum numbers n and l
(i) n = 4, l = 1, (ii) n = 4, l = 0, (iii) n = 3, l = 2, (iv) n = 3, l = 1
can be placed in order of increasing energy, from the lowest to highest, as:

JEE Advanced Test- 12 - Question 68

An objective test contains two sections : A and B, each consisting of 10 questions. In section A, only one choice out of 4 choices is correct and student is awarded 1 mark for every correct answer. In section B, one or more than one choice is (are) correct out of 4 choices and the student is awarded 3 marks if he(she) ticks only the correct choices and all the correct choices. There is no negative marking.

Q. In how many ways can a student answer to any question of section B

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JEE Advanced Test- 12 - Question 69

An electronic transition in hydrogen atom results in the formation of Ha line of hydrogen in Lyman series, the energies associated with the electron in each of the orbits involved in the transition (in kcal mol–1) are

JEE Advanced Test- 12 - Question 70

Hybridization of C2 and C3 of

H3C – CH = C = CH – CH3 are

JEE Advanced Test- 12 - Question 71

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JEE Advanced Test- 12 - Question 72

Detailed Solution for JEE Advanced Test- 12 - Question 72

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