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Chapter Wise 1 JEE

The Quiz is a JEE mains Level quiz containing 25 questions from Basic concepts, & Atomic structure.

In 25 questions 10 questions are single choice, 05 questions are Assertion reasons, 05 questions are match the following type, and 05 questions are integer type.

The time allotted for the quiz is 60 minutes.

The number of attempts remaining is 3

1 / 30

Select the correct statement(s).
(I) Maximum number of electrons having 1. 12 s = +1/2 in Sulphur is 9.
(II) If electron has zero magnetic quantum number, then it must be present in s-orbital.
(III) All isoelectronic ions have same value of Z_eff.
(IV) Number of subshell present in a nth shell is equal to ‘n’.

a) I, IV

b) III, IV

c) II, III

d) All of these

2 / 30

2. The ratio of the shortest wavelength of two spectral series of hydrogen spectrum is found to be about 9. The spectral series are

a) Paschen and Pfund

b) Brackett and Pfund

c) Lyman and Paschen

d) Balmer and Brackett

3 / 30

3. Statement 1: The Paschen series in the spectrum of hydrogen lies in the infra-red region.
Statement 2: The Paschen series is born of transition of electrons onto the second orbit from higher orbits.

a) Statement I is true, Statement II is true; Statement II is NOT a correct explanation for statement-I.

b) Statement I is false, Statement II is true.

c) Statement I is true, Statement II is true; Statement II is the correct explanation for Statement I.

d) Statement I is true, Statement II is false.

4 / 30

4. What is the maximum number of electrons that may be present in all the atomic orbitals with principal quantum number 3 and azimuthal quantum number 2?

5 / 30

5. Ethanol-water mixture has 46 g ethanol in 100 g mixture. By a suitable technique volatile component goes off. Thus

a) 3 moles of non-volatile component are left.

b) 9 N_o atoms of volatile component are separated.

c) All the above statements are correct.

d) 9 N_o atoms of non-volatile component are left.

6 / 30

6. Find the value of n in the molecular formula Be_nAl₂Si₆O₁₈

7 / 30

7. Statement 1: For hydrogen orbital energy increases as 1s < 2s < 2p < 3s < 3p < 3d < 4s < 4p …
Statement 2: The orbital with lower (n + l) value has lesser energy and hence filled up first.

a) Statement I is true, Statement II is false.

b) Statement I is true, Statement II is true; Statement II is NOT a correct explanation for statement-I.

c) Statement I is true, Statement II is true; Statement II is the correct explanation for Statement I.

d) Statement I is false, Statement II is true.

8 / 30

8. 25 g of an unknown hydrocarbon upon burning produces 88 g of CO₂ and 9 g of H₂O. This unknown hydrocarbon contains.

a) 20 g of carbon and 5 g of hydrogen

b) 22 g of carbon and 3 g of hydrogen

c) 18 g of carbon and 7 g of hydrogen

d) 24 g of carbon and 1 g of hydrogen

9 / 30

9. The first line in the Balmer series in the H-atom will have the frequency.

a) 8.02x 10¹⁴ s^-1

b) 4.57x 10¹⁴ s^-1

c) 8.22x 10¹⁵ s^-1

d) 3.29 x 10¹⁵ s^-1

10 / 30

10. Match the expressions/statements in Column I with expressions/Statements in Column II.

MS39

a) (A) → P, R; (B) → P; (C) → P, Q, T; (D) → Q, R

b) (A) → T; (B) → P; (C) → S, T; (D) → Q, R

c) (A) → P, R, S, T; (B) → P; (C) → P, Q, T; (D) → Q, R

d) (A) →S, T; (B) → P; (C) →Q, T; (D) → P, Q, R

11 / 30

11. 29.2 % (w/w) HCl stock solution has a density of 1.25 g mL^–1. The molecular weight of HCl is 36.5 g mol^–1. Find the volume of (mL) of stock solution required to
prepare a 200 mL solution of 0.4 M HCl

12 / 30

12. Calculate the mass of a photon with wavelength 3.6 Å.

a) 6.135 x 10^-30 kg

b) 6.135 x 10^-27 kg

c) 6.135 x 10^-28 kg

d) 6.135 x 10^-33 kg

13 / 30

13. Match the entries in column I with the related quantum number(s) in Column II

MS33

a) A → q, p, r; B → p, q, r, s; C → r; D → p, q, r,s

b) A → q, s, r; B → p, q; C → p, q, r; D → p, q, r

c) A → q, p; B → q, r, s; C → q, r; D → p, q

d) A → q; B → p, q, r, s; C → p, q, r ; D → p, q, r

14 / 30

14. Which of the following sets of quantum numbers are
correct?

MS17
The correct option is.

a) I and II

b) I and III

c) III and IV

d) II and III

15 / 30

15. Match the expressions/statements in Column I with expressions/Statements in Column II.

MS40

a) (A) → P, T; (B) → P, R, T; (C) → P, R; (D) → Q, S

b) (A) → P, Q, R, T; (B) → P, R, T; (C) → P, R; (D) → S

c) (A) → R, T; (B) → P, Q, R, T; (C) → P, R, S; (D) → S

d) (A) → P, Q, R; (B) → Q, R, T; (C) → S, R; (D) → P

16 / 30

16. Statement 1: The kinetic energy of an electron is greater than α-particle having same momentum.
Statement 2: Mass of a-particle is greater than the mass of electron.

a) Statement I is true, Statement II is true; Statement II is NOT a correct explanation for statement-I

b) Statement I is true, Statement II is true; Statement II is the correct explanation for Statement I.

c) Statement I is true, Statement II is false.

d) Statement I is false, Statement II is true.

17 / 30

17. An element has mass number of 23 and its unipositive ion has electronic configuration 1s²2s²2p⁶. Select the correct statement(s).
(I) It is isotonic with Mg²⁴.
(II) The ratio of n to l for last electron in atom of above element is 2.
(III) Atom of the above element is isoelectronic with H₂O.
(IV) Atom of the above element is paramagnetic.

a) III, IV

b) II, III

c) I, IV

d) All

18 / 30

18. Match the following type of rays given in Column I with their characteristics given in Column II. Select an appropriate answer from the codes given below.

MS31

a) A→1; B→2; C→3

b) A→3, B→1; C→2

c) A →3; B →2; C→1

d) A→3; B→2; C→1

19 / 30

19. On bombarding a beam of α-particles on the atom of the gold sheet, few particles get deflected, whereas most of them go straight and remains undeflected. This is due to

a) The neutrons in the nucleus do not have any effect on α-particles.

b) The force of repulsion on fast movingα-particles is very small.

c) The force of attraction on α-particles by the oppositely charged electron is not sufficient.

d) The nucleus occupies much smaller volume as compared to the volume of atom.

20 / 30

20. Match the entries in column I with the related entries in Column II

MS34

a) A → p; B → p; C → p, q, r, s; D → p

b) A → p, s; B → p, q; C → p, q, r, s; D → p

c) A → q, s; B → p; C → r, s; D → p

d) A → s, q; B → p; C → p, r, s; D → p, q

21 / 30

21. The uncertainties in the velocities of two particles A and B are 0.05 and 0.02 ms^-1respectively. The mass of B is five times to that of mass A. What is the ratio of uncertainties (Δx_A /Δx_B) in their positions?

a) 4

b) 0.25

c) 2

d) 1

22 / 30

22. Statement 1: When two or more empty orbitals of equal energy are available. One electron must be placed in each until they are all half-filled.
Statement 2: The pairing of electron is an unfavorable phenomenon.

a) Statement I is true, Statement II is false.

b) Statement I is false, Statement II is true.

c) Statement I is true, Statement II is true; Statement II is NOT a correct explanation for statement-I.

d) Statement I is true, Statement II is true; Statement II is the correct explanation for Statement I.

23 / 30

23. Statement 1: The principal quantum number, n, can have whole number values 1, 2, 3, … etc.
Statement 2: The angular momentum quantum number can never be equal to n.

a) Statement I is true, Statement II is false.

b) Statement I is false, Statement II is true.

c) Statement I is true, Statement II is true; Statement II is the correct explanation for Statement I.

d) Statement I is true, Statement II is true; Statement II is NOT a correct explanation for statement-I.

24 / 30

24. In order to determine the mole precisely, the mass of a carbon A was determined by a B and found to be equal to C g. A, B and C respectively are.

a) A → 1 mole, B → Infrared spectrometer, C → 1.992648 x 10⁻²⁰

b) A → 14 atom, B → atomic spectrometer, C → 1.992648 x 10⁻²¹

c) A → 12 atom, B → mass spectrometer, C → 1.992648 x 10⁻²³

d) A → 12 atom, B → mass spectrometer, C → 1.992 x 10⁻¹⁹

25 / 30

25. A student performs a titration with different burettes and finds titre values of 25.2 mL, 25.25 mL and 25.0 mL Find the number of significant figures in the average titre value

26 / 30

26. Total number of atoms represented by the compound CuSO₄. 5H₂O is

a) 5

b) 21

c) 8

d) 27

27 / 30

27. Arrange the following in the order of increasing mass (Atomic mass of O = 16, Cu = 63 and N = 14).
I. One atom of oxygen
II. One atom of nitrogen
III. 1 x 10^-10mole of oxygen
IV. 1 x 10^-10mole of copper

a) IV< II < III < I

b) II< I < III < IV

c) I < II < III < IV

d) III< II < IV < I

28 / 30

28. The probability density plots of 1s and 2s-orbitals are given in figure.

MS19

The density of dots in a region represents the probability density of finding electrons in the region. On the basis of above diagram, which of the following statements is incorrect?

a) The probability of finding the electron at a given distance is equal in all directions.

b) The probability density of electrons for 2s-orbital decreases uniformly as distance from the nucleus increases.

c) The probability of finding the electron is maximum near the nucleus.

d) 1s and 2s-orbitals are spherical in shape.

29 / 30

29. When zinc reacts with dilute nitric acid, nitrous oxide is produced. What mass of the gas is evolved by treating 325 g zinc with excess of nitric acid?

a) 66 g

b) 55 g

c) 33 g

d) 44 g

30 / 30

30. The maximum number of electrons that can have principal quantum number, n = 3 and spin quantum number, m_s =-1/2 is

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