Class 11 Chemistry Model Paper 1 MCQ Test

1. Splitting of spectral lines by placing the excited atom in electric field is called:

2. Which of these samples of gas contains the same number of atoms as 1g of hydrogen molecule? (At. Mass C = 12, O = 16, H = 1, Ne = 20)

3. A substance which itself is not a catalyst but increases the activity of a catalyst is called:

4. The heat of neutralization of the given reaction is -57.3 kJ
NaOH + HCl → NaCl + H₂O
What is the heat of neutralization of the following reaction?
Fe(OH)₂ + 2HCl → FeCl₂ + 2H₂O

5. The number of bonds in one molecule of Nitrogen is:

6. Diamond is a bad conductor of electricity because:

7. At constant Pressure what will be the change in temperature when the volume of a gas will become twice of what it is at 0°C?

8. In the ground state of an atom, the electron is present:

9. pH of 1 × 10^-4 M solution of Phosphoric acid is:

10. The rate equation for a reaction  2A→ product  is Rate = K [A]². Unit of specific rate constant for this reaction is:

11. The gaseous element X exists in diatomic form. One volume of the element X combines with two volumes of hydrogen to form two volumes of gaseous hydride. What is the formula of hydride of X?

12. Which one of the following exists in the solid state as a giant covalent lattice?

13. The electrode potential of metals are:
Mg²⁺ + 2e^- → Mg     E° = - 2.71 v
Ag →  Ag⁺ + 1e^-       E° = - 0.8 v
Cell potential (emf) of the cell formed by these two will be:

14. Plasma is the mixture of:

15. 5g of urea (M.wt = 60) is dissolved in 250 cm³ of its solution. Concentration of solution will be:

16. In which substance does nitrogen exhibit the highest oxidation state?

17. Mixture containing 0.01 mole/300cm³ of NH₄Cl and 0.1 mole/400cm³ of NH₄OH having pKb = 5 has pH of: