43
Which of the following reactions is not feasible?
- A. Cl2 + 2Kl → 2KCI + I2
- B. Cl2 + 2NaF → 2NaCI + F2
- C. Zn + CuCI2 ZnCl2 + Cu
- D. Zn + 2AgNO3 → Zn(NO3)2 + 2Ag
44
In the Periodic Table, the elements that loss electrons most readily belong to
- A. Group 1 A
- B. Group 11 A
- C. Group 111 A
- D. Group V11 A
45
Which of the following properties increases down a group in the Periodic Table?
- A. Atomic radius
- B. Electronegativity
- C. Electon affinity
- D. Ionization energy
46
Calcium atom ionizes by
- A. gaining two electrons
- B. losing two electrons
- C. sharing two electrons
- D. gaining two protons
47
Two radioactive elements Q and S have half-life periods of 10 hours and 20 hours respectively. Therefore
- A. S decays faster than Q
- B. Q is twice as stable as S
- C. Q emits fewer particles than S
- D. S is more stable than Q
48
Which of the orbitals 4s, 4p, 4d and 4f has the lowest energy?
- A. 4f
- B. 4p
- C. 4d
- D. 4s
49
Pauli Exclusion Principle is related to
- A. quantum numbers of electrons
- B. reversiblility of equlibrium reactions
- C. electronegativity values of elements
- D. collision theory of reaction rates
50
What is the electronic configuration of an element represented as 199X?
- A. 1s 22s2 2p 5
- B. 1s22s23s23p3
- C. 1s2 2s2 2p 33s2
- D. 1s 22s22p 63s23p64s 1
51
Which of the following atoms contains the highest number of electrons in the outermost shell?
- A. 8O
- B. 10Ne
- C. 15P
- D. 19K