Q.7 According to the number of protons, neutrons and electrons given in the table, which one of the
following options is correct?
following options is correct?
| Species | Proton | Neutron | Electron |
| As | 33 | 42 | 30 |
| Ga | 31 | 39 | 28 |
| Ca | 20 | 20 | 20 |
A) As+3, Ga+3, Ca C) As+3, Ga+3, Ca+2
B) As+1, Ga+2, Ca D) As+1, Ga, Ca+2
Q.8 If the e/m value of electron is 1.7588 x 1011 coulombs Kg-1, then what would be the mass of
electron in grams (charge on electron is 1.6022 x 10-19 coulombs)?
A) 9.1095 x 10-31 g C) 9.1095 x 10-28 g
B) 91.095 x 10-31 g D) 0.919095 x 10-33 g
electron in grams (charge on electron is 1.6022 x 10-19 coulombs)?
A) 9.1095 x 10-31 g C) 9.1095 x 10-28 g
B) 91.095 x 10-31 g D) 0.919095 x 10-33 g
Q.9 Which one of the following pairs has the same electronic configuration as possessed by Neon
(Ne-10)?
A) Na+, Cl― C) Na+, Mg2+
B) K+, Cl― D) Na+, F―
Q.10 There are four orbitals s, p, d and f. Which order is correct with respect to the increasing energy
of the orbitals?
A) 4s < 4p < 4d < 4f C) 4s < 4f < 4p < 4d
B) 4p < 4s < 4f < 4d D) 4f < 4s < 4d < 4p
(Ne-10)?
A) Na+, Cl― C) Na+, Mg2+
B) K+, Cl― D) Na+, F―
Q.10 There are four orbitals s, p, d and f. Which order is correct with respect to the increasing energy
of the orbitals?
A) 4s < 4p < 4d < 4f C) 4s < 4f < 4p < 4d
B) 4p < 4s < 4f < 4d D) 4f < 4s < 4d < 4p
Q.11 Number of neutrons in 30 66 Zn will be:
A) 30 C) 38
B) 35 D) 36
Q.12 The maximum number of electrons in electronic configuration can be calculated by using
formula:
A) 2l + 1 C) 2n2
B) 2n2 + 2 D) 2n2 + 1
A) 30 C) 38
B) 35 D) 36
Q.12 The maximum number of electrons in electronic configuration can be calculated by using
formula:
A) 2l + 1 C) 2n2
B) 2n2 + 2 D) 2n2 + 1