JMI 11th Science Entrance Paper 2025 Answer Key

51. Which of the following electronic configuration represents an electropositive element?

a)2,8,8,1
b) 2,8,8
c) 2,8,6
d) 2,7

52. A student placed a zinc rod in FeSO₄ solution. after ten hours the rod was taken out and it was observed that:

a) Zinc rod became thinner
b) Zinc rod became thicker due to iron deposition
c) Zinc rod remains as it was
d) Zinc rod has holes

53. Which of the following is not an organic compound?

a) Acetic acid
b) Chloroform
c) Ethanol
d) Water

54. The property by which a large number of atoms of the same element get linked through covalent bonds forming long chains is called:

a) Catenation
b) Polymerisation
c) Allotropy
d) Addition reaction

55. Identify the wrong sequence of elements in a group:

a) Ca, Sr, Ba
b) N, P, As
c) Cu, Au, Ag
d) Cl, Br, I