Question 1 to 17.
1. According to Bronsted - Lowry definition, an acid is a (a) Proton acceptor (b) proton donor (c) electron pair acceptor (d) none of these
2. An acid reacts with a trioxosulphate (iv) salt to liberate colorless and odorless (b) effervescence (c) pungent (d) all of these sulphur (iv) oxide gas. (a)
3. When copper(II)oxide dissolved in dilute H₂SO₄, it produces a solution which is
(d) orange
(a) green (b) blue (c) red
4. salt is formed when all the replaceable hydrogen atoms in an acid are completely replaced by metal. (a) Acidic (b) Basic (c) Normal (d) hydrated
5. All salts of sodium and potassium are in water. (a) insoluble (b) soluble (c) Partially (d) a & c
6. The reaction 2Al(OH)2(5)→ Al2O315) + H2O(g) is used obtained insoluble basic oxide by
(a) decomposition (b) precipitation (c) combustion (d) substitution 7
. Alkalis are bases that dissolve in water. (a) slightly (b) completely (c) Partially (d) a & c.
8. How many orbitals are in the subshell? (a)2(b)5(c)1(d)3
9. What are the quantum numbers described by a 3p orbital? (a)n=3, l=1, ml=1 (b) n=3, I=1 ml=0 (c)n=3,l=1,
ml=-1(d) All of the above
10. The maximum number of electrons that can be accommodated in a sublevel for l=3 is (a)2(b)10(c)6(d)8
11. The electronic configuration is the arrangement of electrons in (a) Nucleus (b) Shells (c) sub-shells (d) all of the above
12. According to Aufbau principle _ (a) Electrons enter the lowest available energy level (b) only two electrons can occupy an orbital (c) orbital are region of finding electron (d) electrons tend to remain unpaired
13. After 3s the subshell begins to fill is (a) 3p (b) 3d (c) 3f (d) 4s
14. What is the correct electronic configuration of an atom with atomic number 8? (a) 1s²,2s², 2p6, (b) 1s², 2s6, (c) 1s², 2s², 2p (d) 2s², 2p6
15. Which of the following is a linear molecule? (a) BeCl2 (b) CH4 (c) NH3 (d) H₂O
16. Atoms are the smallest particles of any................carrying all the properties of that element. (a) Molecule (b) Macromolecules (c) Element (d) Metal
17. In normal situations all atoms are (a) positively charged (b) electrically neutral (c) negatively charged (d)
electrically insignificant 18. Which of the following has a positive charge? (a) Proton (b) Neutron (c) Anion (d)Electron
The correct answer choices for the questions are:
1. (b) proton donor
2. (a) effervescence
3. (c) red
4. (c) Normal
5. (b) soluble
6. (b) precipitation
7. (b) completely
8. (a) 2
9. (c) n=3, l=1, ml=-1
10. (d) 8
11. (c) sub-shells
12. (a) Electrons enter the lowest available energy level
13. (b) 3d
14. (a) 1s²,2s²,2p6,
15. (a) BeCl2
16. (c) Element
17. (b) electrically neutral
18. (a) Proton