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IIT JAM Chemistry Mock Test 1 - Chemistry MCQ


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60 Questions MCQ Test Mock Test Series for IIT JAM Chemistry - IIT JAM Chemistry Mock Test 1

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

Detailed Solution for IIT JAM Chemistry Mock Test 1 - Question 1

IIT JAM Chemistry Mock Test 1 - Question 2

For the following equilibrium, N2O4(g) → 2NO2(g) Kp is found to be equal to Kc. This is attained when:

Detailed Solution for IIT JAM Chemistry Mock Test 1 - Question 2

Correct Answer: D (12.18 K)

Explanation:
The relationship between Kp and Kc is given by the equation:

Kp = Kc(RT)^(Δn)

where Δn is the change in the number of moles of gas in the reaction, R is the ideal gas constant, and T is the temperature in Kelvin.

For the given equilibrium, N2O4(g) → 2NO2(g), the change in the number of moles of gas, Δn, is:

Δn = (moles of products) - (moles of reactants)
Δn = 2 - 1
Δn = 1

We know that Kp = Kc, so:

Kc(RT)^(Δn) = Kc

This equation simplifies to:
RT = 1
Let's consider the possibility that the constant R used in the question is given in a different unit, such as atm·L/(mol·K). In this case, R = 0.0821 atm·L/(mol·K). We can solve for T again:

T = 1/R
T = 1/0.0821
T ≈ 12.18 K

This value matches option D, so the correct answer is 12.18 K.

IIT JAM Chemistry Mock Test 1 - Question 3

Aluminium-25 decay by emitting a positron. The species immediately produced has:           

IIT JAM Chemistry Mock Test 1 - Question 4

The temperature coefficient of two reactions are 2 and 3 respectively. Which would be correct for these reactions?           

Detailed Solution for IIT JAM Chemistry Mock Test 1 - Question 4

IIT JAM Chemistry Mock Test 1 - Question 5

Which of the following amino acid is hydrophobic?           

Detailed Solution for IIT JAM Chemistry Mock Test 1 - Question 5

Correct answer is option D) All
Hydrophobic Amino Acids

  • Phe (Phenylalanine)

  • Try (Tryptophan)

  • Ile (Isoleucine)

Answer:

  • All of the mentioned amino acids (Phe, Try, and Ile) are hydrophobic.


  •  
IIT JAM Chemistry Mock Test 1 - Question 6

IIT JAM Chemistry Mock Test 1 - Question 7

Arrange the following in decreasing order of stretching frequency  of C-O bond (cm–1):
(I) Mo(CO)3(NMe3)3              (II) Mo(CO)3[P(OPh)3]3
(III) Mo(CO)3(PMe3)3            (IV) Mo(CO)3(PCl3)3

Detailed Solution for IIT JAM Chemistry Mock Test 1 - Question 7

Correct answer is  option (D).
Decreasing Order of Stretching Frequency of C-O Bond (cm–1):

- IV) Mo(CO)3(PCl3)3
- II) Mo(CO)3[P(OPh)3]3
- III) Mo(CO)3(PMe3)3
- I) Mo(CO)3(NMe3)3

The decreasing order of stretching frequency of the C-O bond (cm–1) can be explained by considering the electron-donating or withdrawing ability of the ligands attached to the metal center. The higher the electron-donating ability of the ligands, the more electron density will be present on the metal center, which will weaken the C-O bond and result in a lower stretching frequency.

In this case, the order can be explained as follows:
- Mo(CO)3(PCl3)3 (IV): The PCl3 ligands are strong electron-withdrawing groups, which causes the C-O bond to be stronger and have a higher stretching frequency.
- Mo(CO)3[P(OPh)3]3 (II): The P(OPh)3 ligands are less electron-withdrawing than PCl3, resulting in a weaker C-O bond and a lower stretching frequency compared to IV.
- Mo(CO)3(PMe3)3 (III): The PMe3 ligands are electron-donating groups, which further weakens the C-O bond and lowers the stretching frequency compared to II.
- Mo(CO)3(NMe3)3 (I): The NMe3 ligands are strong electron-donating groups, which results in the weakest C-O bond and the lowest stretching frequency among all the complexes.

Therefore, the correct order is IV > II > III > I.

IIT JAM Chemistry Mock Test 1 - Question 8

Which of the following form stable for CN—CH2—CH2—CN?           

Detailed Solution for IIT JAM Chemistry Mock Test 1 - Question 8

Correct answer is Option (C).

Explanation:

In the given molecule CN—CH2—CH2—CN, we can analyze the stable conformations based on the dihedral angle between the CN groups. The conformations are:

A: Gauche-form
- In this conformation, the dihedral angle between the CN groups is around 60°.
- The molecule will have a slight steric hindrance between the CN groups as they are close to each other.
- This form is not the most stable conformation.

B: Partially-eclipsed
- In this conformation, the dihedral angle between the CN groups is around 120°.
- The molecule will have a moderate steric hindrance between the CN groups.
- This form is less stable than the anti-form.

C: Anti-form
- In this conformation, the dihedral angle between the CN groups is 180°.
- This conformation has the least steric hindrance between the CN groups as they are farthest apart.
- This form is the most stable conformation.

D: Eclipsed-form
- In this conformation, the dihedral angle between the CN groups is 0°.
- The molecule will have maximum steric hindrance between the CN groups as they are directly overlapping.
- This form is the least stable conformation.

Hence, the most stable conformation for the given molecule CN—CH2—CH2—CN is the anti-form (Option C), where the dihedral angle between the CN groups is 180° and there is minimum steric hindrance.

IIT JAM Chemistry Mock Test 1 - Question 9

If

Given  Which of the following holds true?

IIT JAM Chemistry Mock Test 1 - Question 10

By Cannizaro reaction A changes to B and C as given. Hence, A is:

IIT JAM Chemistry Mock Test 1 - Question 11

Emf of Cd-cell is 1.018 V at 25°C. The temperature coefficient of cell is –5.2 × 10–5 VK–1. How cell temperature will change during operation?           

IIT JAM Chemistry Mock Test 1 - Question 12

Match the correctly:
Carbonyl                                          

(W) 12C O16                                           (k) 2160

(X) 13C O16                                            (l) 1830

(Y) 13C O17                                            (m) 1951

            (Z) 12C O17                                              (n) 2106

IIT JAM Chemistry Mock Test 1 - Question 13

 Calculate En if represents state of a particle in 1-D box of length 1nm:

Detailed Solution for IIT JAM Chemistry Mock Test 1 - Question 13


Based on this, Option D is the most similar to the given energy equation for a particle in a 1D box, as it includes the correct placement of the 2m in the denominator along with the length of the box squared. The only difference is the absence of the quantum number n2 and the π2 term.

IIT JAM Chemistry Mock Test 1 - Question 14

The given carbocation rearrangement into:

IIT JAM Chemistry Mock Test 1 - Question 15

The self-ionization constant for pure formic, acid,  has been estimated as 10–6 at room temperature. The density of formic acid is 1.15 g/cm3. The percentage of formic acid molecules in pure formic acid are converted to formate ion:

IIT JAM Chemistry Mock Test 1 - Question 16


Products A and B are:

IIT JAM Chemistry Mock Test 1 - Question 17

25 mL of hydrogen and 18 mL of Iodine when heated in closed container, produced 30.8 mL of HI at equilibrium. Calculate degree of dissociation of HI at same temperature:           

IIT JAM Chemistry Mock Test 1 - Question 18

For a surface inactive substance (excessive concentration of solute per unit area of surface) is essentially:           

IIT JAM Chemistry Mock Test 1 - Question 19

Which of the following does not show facial & meridonial isomerism?

IIT JAM Chemistry Mock Test 1 - Question 20

The plane(s) which show allowed reflection in both bcc and fcc lattices is/are:           
(I) 100                               (II) 111                                 (III) 110           

IIT JAM Chemistry Mock Test 1 - Question 21

Consider μ1, μ2, μ3 are dipole moments of Pyrrole, Furan, Thiopene respectively. Which of the following holds true:

IIT JAM Chemistry Mock Test 1 - Question 22

The product B is:

IIT JAM Chemistry Mock Test 1 - Question 23

Which of the following conversion take place in bourdon tubes?

Detailed Solution for IIT JAM Chemistry Mock Test 1 - Question 23

In bourdon tubes converts input pressure into displacement and displacement of the needle will be directly proportional to input pressure.

IIT JAM Chemistry Mock Test 1 - Question 24

Which of the following is true about Osazone formation in carbohydrates?           

IIT JAM Chemistry Mock Test 1 - Question 25

If bond length of CO bond in carbon monoxide is 1.128 Å, then, what is the value of CO bond length in Fe(CO)5?

IIT JAM Chemistry Mock Test 1 - Question 26

Consider borax. Chemical formula of which is Na2B4O7. 10H2O. Choose the incorrect statement:

IIT JAM Chemistry Mock Test 1 - Question 27

Which of the following will give different product on hydrolysis (among others)?

IIT JAM Chemistry Mock Test 1 - Question 28

1H NMR spectrum of a compound with molecular formula C4H9NO2 shows:
d 5.30 (broad, 1H); d 4.10 (q, 2H); d 2.80 (d, 3H); d 1.20 (t, 3H). The structure of compound that is consistence with the above data is:

IIT JAM Chemistry Mock Test 1 - Question 29

How are the following compounds related?

IIT JAM Chemistry Mock Test 1 - Question 30

If sin2q = 0.1198, 0.2395, 0.3588, 0.4793, 0.5984. Find lattice type:

*Multiple options can be correct
IIT JAM Chemistry Mock Test 1 - Question 31

Which of the following conversions is/are correctly presented?

*Multiple options can be correct
IIT JAM Chemistry Mock Test 1 - Question 32

Select the correct statement with respect to alkali metals.           

*Multiple options can be correct
IIT JAM Chemistry Mock Test 1 - Question 33

Choose the correct statement/s:           

*Multiple options can be correct
IIT JAM Chemistry Mock Test 1 - Question 34

Incorrect statement regarding above compounds:

(I) A and C are enantiomer           (II) B and D are diastereomers           
(III) C and D are enantiomers       (IV) A and B are homomer                                

Detailed Solution for IIT JAM Chemistry Mock Test 1 - Question 34

Incorrect statement is :
- (I) A and C are enantiomer   
- (IV) A and B are homomer    

*Multiple options can be correct
IIT JAM Chemistry Mock Test 1 - Question 35

Choose the correct statement/s among following:           

*Multiple options can be correct
IIT JAM Chemistry Mock Test 1 - Question 36

Select the correct statements.             

*Multiple options can be correct
IIT JAM Chemistry Mock Test 1 - Question 37

Which statement is incorrect about the following reaction?     
      

*Multiple options can be correct
IIT JAM Chemistry Mock Test 1 - Question 38

Which of the following is/are correct in reference to RNA?           

*Multiple options can be correct
IIT JAM Chemistry Mock Test 1 - Question 39

Which of following conversions is/are correct in reference to peri-cyclic reactions?
 

*Multiple options can be correct
IIT JAM Chemistry Mock Test 1 - Question 40

Which of the following conversion is/are incorrectly presented?

*Answer can only contain numeric values
IIT JAM Chemistry Mock Test 1 - Question 41

What is the spin multiplicity of Fischer carbene?


*Answer can only contain numeric values
IIT JAM Chemistry Mock Test 1 - Question 42

How many signals are obtained for the following compound in 1H NMR spectroscopy?


*Answer can only contain numeric values
IIT JAM Chemistry Mock Test 1 - Question 43

M/O2 (where M = Metal center) binding ratio in Hemocyanin is:


*Answer can only contain numeric values
IIT JAM Chemistry Mock Test 1 - Question 44

Given is the ester hydrolysis reaction   Order of reaction is __________?


*Answer can only contain numeric values
IIT JAM Chemistry Mock Test 1 - Question 45

The number of S–S bonds, in sulphur trioxide trimer (S3O9) is :


*Answer can only contain numeric values
IIT JAM Chemistry Mock Test 1 - Question 46

Number of 2c -2e- bonds in Al2(CH3)6 :


*Answer can only contain numeric values
IIT JAM Chemistry Mock Test 1 - Question 47

Root mean square velocity of H2 molecule having density 0.09 gL–1 at 1 atm is x × 103 ms-1 then    what is the value of x? (rounded up to first decimal place)


*Answer can only contain numeric values
IIT JAM Chemistry Mock Test 1 - Question 48

100 ml of unknown reducing agent is reacted with 500 mL, 0.1 M excess I2 solution. If remaining I2 required 0.1 M, 200 mL Na2S2O3 solution for complete neutralization. Calculate normality of unknown reducing agent.


*Answer can only contain numeric values
IIT JAM Chemistry Mock Test 1 - Question 49

Consider the silicate Ba2NaxSi5O15. What is the value of ‘x’?


*Answer can only contain numeric values
IIT JAM Chemistry Mock Test 1 - Question 50

A sample of rock from moon contains equal number of atoms of uranium and lead. The age of the rock would be (in years, rounded up to first decimal place, in the multiple of 109) of the mineral. (Half-life of 238U is 4.5 × 109 years):


*Answer can only contain numeric values
IIT JAM Chemistry Mock Test 1 - Question 51

If one of the bonds in NH3 molecule has 22% s-character, how much percentage of it is expected to be present in lone pair? (rounded up to first decimal place)


*Answer can only contain numeric values
IIT JAM Chemistry Mock Test 1 - Question 52

Depression of freezing point of 0.01 molal aq. CH3COOH solution is 0.02046°. 1 molal urea    solution freezes at – 1.86°C. Assuming molality equal to molarity, pH (rounded up to first decimal place) of CH3COOH solution is?


*Answer can only contain numeric values
IIT JAM Chemistry Mock Test 1 - Question 53

A solution made up to be 0.0100 M Co(NO3)2 and 0.0200 M N2H4 was found to have an equilibrium concentration of [Co2+] is 6 × 10–3 M. Assuming that the only complex formed was Co(N2H4)2+, what is the apparent Kf for complex formation? (rounded up to two decimal place)


*Answer can only contain numeric values
IIT JAM Chemistry Mock Test 1 - Question 54

Number of metal-metal bond in [Re2Cl4(PPhMe2)4] is?


*Answer can only contain numeric values
IIT JAM Chemistry Mock Test 1 - Question 55

The pKa values for the three ionizable groups, X, Y and Z of glutamic acid are 4.3, 9.7 and 2.2 respectively:

The isoelectric point for the amino acid is:


*Answer can only contain numeric values
IIT JAM Chemistry Mock Test 1 - Question 56

Find the value of lmax in (nm) in following compound.
Given: Base value of Heteroannular component = 214 nm
Homoannular component = 253 nm
Increment for each extra double bond = 30 nm
Exocyclic bond = 5 nm; Alkyl/Ring residues = 5 nm


*Answer can only contain numeric values
IIT JAM Chemistry Mock Test 1 - Question 57

How many of the following ores contain both iron & copper?
Cuprite, Chalcocite, Chalcopyrite, Malachite, Copper Glance.


*Answer can only contain numeric values
IIT JAM Chemistry Mock Test 1 - Question 58

What is the group number of the element having electronic configuration [Xe]4F145S2?


*Answer can only contain numeric values
IIT JAM Chemistry Mock Test 1 - Question 59

Among the following, the number of molecules that possess C2 axis of symmetry is ________:


BF3 ; BGCI3 ; 2,5 -dimethythiophene


*Answer can only contain numeric values
IIT JAM Chemistry Mock Test 1 - Question 60

Calculate the specific rotations (in 0°C) of the following sample taken at 25°C using the sodium D line. 1.00 g of sample is dissolved in 20.0 mL of ethanol. Then 5.00 mL of this solution is placed in a 20.0 cm polarimeter tube. The observed is 1.25° counterclockwise.


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