1. Nucleus was discovered by
[a] Neils Bohr
[b] J J Thompson
[c] James Chadwick
[d] Rutherford
2. Atoms of the same element having same atomic number but different mass numbers is called
[a] Isomers
[b] Isobars
[c] Isotones
[d] Isotopes
3. The maximum number of electrons that can be accommodated in an orbital is
[a] 2
[b] 6
[c] 10
[d] 14
4. Fl is the symbol of
[a] Fluorine
[b] Flerovium
[c] Fermium
[d] Francium
5. Isosters are molecules containing the same number of
[a] protons & neutrons
[b] atoms and electrons
[c] atoms & neutrons
[d] electrons & neutrons
6. Avogadro’s number is
[a] 6.02x10²⁴
[b] 6.20x10²⁴
[c] 6.02x10²³
[d] 6.20x10²⁴
7. 1 amu is defined as the mass equal to 1/12th of the mass of an atom of
[a] ¹²C
[b] ¹³C
[c] ¹H
[d]²H
8. Uncertainty Principle is proposed by
[a] de Broglie
[b] Bohr
[c] Max Plank
[d] Heisnberg
9. Water has maximum density at
[a] 0°C
[b] 4°C
[c] 100°C
[d] 40°C
10. H₂O exists as a liquid due to the presence of
[a] Ionic bond
[b] London Forces
[c] Hydrogen Bond
[d] Co-ordinate bond
11. The most abundant element in the human body is
[a] Oxygen
[b] Hydrogen
[c] Carbon
[d] Nitrogen
12. The polymer used to make nonstick utensils is
[a] Freon
[b] Teflon
[c] Bakelite
[d] Polythene
13. An example of a secondary cell is
[a] Dry cell
[b] Mercury cell
[c] lead storage cell
[d] Both [a] & [b]
14. Who proposed the Law of Octaves?
[a] Newlands
[b] Dobereiner
[c] Lavoisier
[d] Mosely
15. Which of the following is known as Slaked Lime?
[a] Calcium Oxide
[b] Calcium Carbonate
[c] Calcium Hydroxide
[d] Calcium Phosphate
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