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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

1. 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 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.

2 / 30

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

MS40

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

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

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

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

3 / 30

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

MS38

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

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

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

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

4 / 30

4. 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) All the above statements are correct.

c) 9 N_o atoms of volatile component are separated.

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

5 / 30

5. Similar to quantum number n, l, m a set of new quantum numbers was introduced with similar logic but different values defined as
x = 1, 2, 3... all (+ve) integral values
y = (x – 1) (x – 2)(x – 3)... No (–ve) value
z = +(y + 1/2) to – (y + 1/2) in integral steps
For each value of (z), there will be two electrons, if (x + y) rule is followed similar to (n + l) rule then number of electrons in third shell for Zn (Atomic number = 30) is

a) 15

b) 13

c) 14

d) 12

6 / 30

6. X’ is the amount of a substance that contains as many particles as there are atoms in exactly 12 g of the Y isotope. X and Y respectively are

a) X → one mole, Y → ¹²C

b) X → percentage composition, Y → ¹²C

c) X → one mole, Y → ¹⁴C

d) X → percentage composition, Y → ¹⁴C

7 / 30

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

a) 8

b) 27

c) 21

d) 5

8 / 30

8. 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) I < II < III < IV

c) II< I < III < IV

d) III< II < IV < I

9 / 30

9. Consider the following laws of chemical combination with examples.
I. Law of multiple proportion: N₂O, NO, NO₂.
II. Law of reciprocal proportion: H₂O, SO₂, H₂S.
Which is correct with example?

a) Only I

b) None of these

c) Only II

d) I and II

10 / 30

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

11 / 30

11. 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 nucleus occupies much smaller volume as compared to the volume of atom.

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

12 / 30

12. 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 → 12 atom, B → mass spectrometer, C → 1.992 x 10⁻¹⁹

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

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

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

13 / 30

13. Statement I: s-orbital electron will be more tightly bound to the nucleus than p-orbital electron.
Statement II: Z_effexperienced by the electron decreases with increase of azimuthal quantum number (l )

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

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

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

14 / 30

14. What is the work function of the metal, n the light of wavelength 4000 Å generates photoelectron of velocity 6 x 10⁵m s ^-1from it?
(Mass of electron = 9 x 10^-31kg, Velocity of light = 3 x 10⁸ m s^-1, Planck’s constant = 6.626 x 10^-34 Js, Charge of electron = 1.6 x 10^-19 JeV^-1)

a) 2.1 eV

b) 0.9 eV

c) 3.1 eV

d) 4.0 eV

15 / 30

15. 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

16 / 30

16. 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

17 / 30

17. 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

18 / 30

18. Which of the following statement is incorrect about the characteristics of cathode rays?

a) They start from the cathode and move towards the anode

b) They travel in a straight line in the absence of an external electrical or magnetic field.

c) Characteristics of cathode rays do not depend upon the material of electrodes in cathode ray tube.

d) Characteristics of cathode rays depend upon the nature of gas present in the cathode ray tube.

19 / 30

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

MS33

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

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

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

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

20 / 30

20. Among the following, what is the number of elements showing only one non-zero oxidation state? O, Cl, F, N, P, Sn, Tl, Na, Ti

21 / 30

21. 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.

22 / 30

22. 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) 1

b) 2

c) 4

d) 0.25

23 / 30

23. 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 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.

24 / 30

24. 25 g of an unknown hydrocarbon upon burning produces 88 g of CO₂ and 9 g of H₂O. This unknown hydrocarbon contains.

a) 22 g of carbon and 3 g of hydrogen

b) 18 g of carbon and 7 g of hydrogen

c) 20 g of carbon and 5 g of hydrogen

d) 24 g of carbon and 1 g of hydrogen

25 / 30

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

a) 6.135 x 10^-27 kg

b) 6.135 x 10^-28 kg

c) 6.135 x 10^-33 kg

d) 6.135 x 10^-30 kg

26 / 30

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

27 / 30

27. A₂reacts with B₂in either of the following ways depending upon supply of B2:
A₂+ B₂ → 2AB
A₂+ 3B₂→ 2AB₃
Also, the products formed may also react with appropriate reactant remaining to form other product. Using this information, match composition of the final mixture for initial amount of reactants.

MS36

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

b) (A) → Q, S; (B) → P, Q; (C) → P, R

c) (A) → P, S; (B) → P, Q; (C) → Q, R

d) (A) → P, Q, S; (B) → P, Q; (C) → R

28 / 30

28. Statement I: No two electrons in an atom can have the same values of four quantum numbers.
Statement II: No two electrons in an atom can be simultaneously in the same shell, same subshell, same orbitals and have the same spin.

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

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

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

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

29 / 30

29. 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

30 / 30

30. A ball of mass 100 g is moving with 100 ms^–1. Its wavelength is x x 10^-25 A. Value of x to closest integer is

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