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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. 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 → one mole, Y → ¹⁴C

c) X → percentage composition, Y → ¹⁴C

d) X → percentage composition, Y → ¹²C

2 / 30

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

MS35

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

b) A → p; B → r, t; C → s; D → q,r

c) A → q, p; B → r, t; C → s; D → r

d) A → r, p; B → r, t; C → s; D → q

3 / 30

3. 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) 33 g

b) 44 g

c) 66 g

d) 55 g

4 / 30

4. Chlorine exists in two isotopic forms, Cl-37 and Cl-35 but its atomic mass is 35.5. This indicates the ratio of Cl-37 and Cl-35 is approximately.

a) 1:2

b) 1:1

c) 3:1

d) 1:3

5 / 30

5. 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?

6 / 30

6. 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

7 / 30

7. 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

8 / 30

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

MS34

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

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

c) A → q, s; B → p; C → r, s; D → p

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

9 / 30

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

10 / 30

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

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

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

11 / 30

11. 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 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.

12 / 30

Select the correct statement(s).
(I) Maximum number of electrons having 12. 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) All of these

b) III, IV

c) I, IV

d) II, III

13 / 30

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

14 / 30

14. 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) II, III

b) All

c) III, IV

d) I, IV

15 / 30

15. 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 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.

16 / 30

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

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

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

17 / 30

17. 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) 12

c) 13

d) 14

18 / 30

18. Statement I: The ground state configuration of Cr is 3d⁵4s¹.
Statement II: A set of exactly half-filled orbitals containing parallel spin arrangement provide extra stability.

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

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 false, Statement II is true.

19 / 30

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

a) 8.02x 10¹⁴ s^-1

b) 3.29 x 10¹⁵ s^-1

c) 4.57x 10¹⁴ s^-1

d) 8.22x 10¹⁵ s^-1

20 / 30

20. 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) 1

d) 2

21 / 30

21. Which of the following has correct the matching of curve and orbital?

MS12

(I) I→ (2p); II→ (1s); III→ (4p)
(II) I→ (3p); II→ (3d); III→ (3s)
(III) I→ (4d); II→ (2p); III→ (5d)
(IV) I→ (2s); II→ (4f); III→ (3d)

a) II, III

b) III, IV

c) I, III

d) All

22 / 30

22. What is the concentration of sugar (C₁₂H₂₂O₁₁) mol L^-1if its 20 g are dissolved in enough water to make a final volume up to 2 L in mol L^-1?

a) 0.0592

b) 0.0711

c) 0.0292

d) 0.0375

23 / 30

23. 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 II

b) I and II

c) Only I

d) None of these

24 / 30

24. 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) 1s and 2s-orbitals are spherical in shape.

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

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

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

25 / 30

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

MS37

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

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

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

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

26 / 30

26. 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

27 / 30

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

MS38

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

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

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

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

28 / 30

28. 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→3, B→1; C→2

b) A→1; B→2; C→3

c) A →3; B →2; C→1

d) A→3; B→2; C→1

29 / 30

29. Statement I: p-orbital has dumb-bell shape. Because
Statement II: Electrons present in p-orbital can have one of three values for ‘m’, i.e., 0, +1, –1.

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 false, Statement II is true.

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

30 / 30

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

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

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

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

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