MCQs Questions for Engineering chemistry PDF

1. To any direction because of which one the s-orbital does not show preference?

(A) It is the smallest orbital

(B) It is spherically symmetric

(C) It is present in every atom

(D) It is the first orbital

2. A vapor line indicates which one with reference to a two-component system?

(A) The area below which components do not mingle

(B) The region where a solubility remains constant

(C) The region where a temperature and pressure remains stable

(D) The area above which two components mingle to form a single mixture

3. ____________ is the definition of a lower critical temperature.

(A) At which two components form a mixture the lowest temperature

(B) At which two components will attain vapor state the lowest temperature

(C) At which two components sublimates the lowest temperature

(D) At which equilibrium is achieved the minimum temperature

4. Valence Bond Theory was developed in the year?

(A) 1916

(B) 1930

(C) 1932

(D) 1927

5. An isobar indicates which one with reference to a two-component system?

(A) Where the composition lies in equilibrium the region

(B) Which only the liquid vapors remain in the area above

(C) Where the temperature remains constant the region

(D) Phase end products remain in the area below

6. The direction of a bond that is formed due to overlapping will be which of the following according to VBT?

(A) In which orbitals are concentrated in the opposite direction

(B) In which orbitals are concentrated in the same direction

(C) In which orbitals are concentrated perpendicular to the direction

(D) None of these

7. If both of them have identical stability ____________ orbital would form a stronger bond.

(A) A one which is more by direction concentrated

(B) It differs from atom to atom

(C) Two will be equally strong

(D) One which is less by direction concentrated

8. The formation of a stable bond requires according to VBT.

(A) A greater overlapping of electron clouds

(B) To each other, the two atoms should be close

(C) All of these

(D) A electrons should have opposite spins

9. The p-orbital is in the shape of which one?

(A) Sphere

(B) None of these

(C) Pear-shaped lobe

(D) Dumbbell

10. The term “metastable” indicate to_____

(A) Which a vapor-liquid mixture has obtained the area below

(B) Where the pressure remains constant with low value the region

(C) Where the composition of the system remains constant the region

(D) Where the temperature remains constant the region

11. ____statements are not true for a system that has reached the eutectic temperature.

(A) Components lie in a liquid state

(B) The region between the eutectic and sublimation curve lies stable

(C) The system is a miscible fluid

(D) The system is an open system

12. ______ statements are correct about the equilibrium point on the two-component system.

(A) All the compounds are liquid

(B) Invariant reaction takes place

(C) Then the boiling points of the individual compounds, the boiling point of the mixture is less

(D) The degree of freedom is 0

13. ___ is not responsible for phase deposition.

(A) Grain size

(B) Container wall

(C) Stacking effect

(D) Disjoints

14. _______ the particle growth occur.

(A) Movement of the equilibrium liquid

(B) Movement of grains

(C) Equilibrium mixture

(D) Non-equilibrium mixture

15. During metastable state, which of the following is the size of the particle?

(A) Won’t change

(B) Decreases

(C) Increases

(D) Not related

16. With temperature as follows under _____ condition overall transformation rate changes?

(A) Decreases

(B) Increases with temperature

(C) Increases then decreases

(D) Follows a linear path