A: | Atoms of all elements are composed of two fundamental particles. |
B: | \(9.10939 \times 10^{-31} \mathrm{~kg} \text {. }\). | The mass of the electron is
C: | All the isotopes of a given element show same chemical properties. |
D: | Protons and electrons are collectively known as nucleons. |
E: | Dalton's atomic theory regarded the atom as an ultimate particle of matter. |
1. | B, C and E only | 2. | A, B and C only |
3. | C, D and E only | 4. | A and E only |
A. | dipole - dipole forces |
B. | dipole-induced dipole forces |
C. | hydrogen bonding |
D. | covalent bonding |
E. | dispersion forces |
1. | |
2. | |
3. | |
4. |
1. | Mg plays role in neuromuscular function and interneuronal transmission. |
2. | The daily requirement of Mg and Ca in the human body is estimated to be 0.2-0.3 g. |
3. | All enzymes that utilize ATP in phosphate transfer require Ca as the cofactor. |
4. | The bone in the human body is an inert and unchanging substance. |
1. | \(\text{OH}^- \) | 2. | \(\text{NH}_3 \) |
3. | \(\text H_2 \text O \) | 4. | \(\text{BF}_3 \) |
1. | 2. | ||
3. | 4. | - |
Match the allotropes of cabon given in List I with the respective characteristics given in List II.
List-I | List-II | ||
A. | Coke | I. | Carbon atoms are sp3 hybridised. |
B. | Diamond | II. | Used as a dry lubricant |
C. | Fullerene | III. | Used as a reducing agent |
D. | Graphite | IV. | Cage like molecules |
Options: | (A) | (B) | (C) | (D) |
1. | III | IV | I | II |
2. | II | IV | I | III |
3. | IV | I | II | III |
4. | III | I | IV | II |