JEE Advanced 2023 Questions
Candidates can check some of the questions asked in the JEE Advanced 2023 exam as mentioned below.
Q.1: Let X be the set of all five digit numbers formed using 1,2,2,2,4,4,0. For example, 22240 is in X while 02244 and 44422 are not in X . Suppose that each element of X has an equal chance of being chosen. Let p be the conditional probability that an element chosen at random is a multiple of 20 given that it is a multiple of 5. Then the value of 38p is equal to:
Q.2:
Q.3: A string of length 1 m and mass 2 × 10−5 kg is under tension T. When the string vibrates, two successive harmonics are found to occur at frequencies 750 Hz and 1000 Hz. The value of tension T is _____ Newton.
Q.4:
Q.5: When the chimney is closed using a cap at the top, a pressure difference P develops between the top and the bottom surfaces of the cap. If the changes in the temperature and density of the hot air, due to the stoppage of air flow, are negligible then the value of P is ______ N m−2 .
Q.6:
Q.7: Consider the following statements related to colloids.
(I) Lyophobic colloids are not formed by simple mixing of dispersed phase and dispersion medium.
(II) For emulsions, both the dispersed phase and the dispersion medium are liquid.
(III) Micelles are produced by dissolving a surfactant in any solvent at any temperature. (IV) Tyndall effect can be observed from a colloidal solution with dispersed phase having the same refractive index as that of the dispersion medium.
The option with the correct set of statements is
(A) (I) and (II)
(B) (II) and (III)
(C) (III) and (IV)
(D) (II) and (IV)
Q.8:
Q.9: Consider the following molecules: Br3O8, F2O, H2S4O6, H2S5O6, and C3O2. Count the number of atoms existing in their zero oxidation state in each molecule. Their sum is____.
Q.10:
Q.11: The total number of carbon atoms and heteroatoms present in one molecule of S is ______ . [Use: Molar mass (in g mol–1 ): H = 1, C = 12, N = 14, O = 16, Br = 80, Cl = 35.5 Atoms other than C and H are considered as heteroatoms]
