

MCQOPTIONS
This section includes 36 Mcqs, each offering curated multiple-choice questions to sharpen your ENGINEERING SERVICES EXAMINATION (ESE) knowledge and support exam preparation. Choose a topic below to get started.
1. |
Ionization energy decreases down the group. It is the energy required by an isolated gaseous atom to form an anion. |
A. | True |
B. | False |
Answer» C. | |
2. |
Radon is the sixth member of group 18 of the modern periodic table. Unlike other members of this group, Radon: |
A. | is solid near room temperature |
B. | is radioactive |
C. | possess high chemical reactivity |
D. | all of the mentioned |
Answer» C. possess high chemical reactivity | |
3. |
Moving down a group, which of the following properties generally diminishes? |
A. | Electronegativity |
B. | Metallic character |
C. | Atomic radius |
D. | Molar mass |
Answer» B. Metallic character | |
4. |
Uranium and Thorium are two important elements in the nuclear power industry. In which block of the modern periodic table are they placed? |
A. | s-block |
B. | p-block |
C. | d-block |
D. | f-block |
Answer» E. | |
5. |
d-block elements generally show multiple oxidation states. An exception to this is: |
A. | Zinc |
B. | Mercury |
C. | Copper |
D. | None of the mentioned |
Answer» E. | |
6. |
There are seventeen non-metals in the periodic table. Unlike metals in the same period, they have higher: |
A. | Atomic number |
B. | Atomic size |
C. | Electropositivity |
D. | All of the mentioned |
Answer» B. Atomic size | |
7. |
Temporary IUPAC systematic symbol for the synthetic element 117 is: |
A. | Uuh |
B. | Uns |
C. | Uus |
D. | Une |
Answer» D. Une | |
8. |
How many periods are there in a modern periodic table? |
A. | 5 |
B. | 6 |
C. | 7 |
D. | 8 |
Answer» D. 8 | |
9. |
As we move down a group, electronegativity of elements generally: |
A. | Increases |
B. | Decreases |
C. | Increases and then decreases |
D. | Decreases and then increases |
Answer» B. Decreases | |
10. |
Elements in the same column of the periodic table have: |
A. | Similar valence shell electron configuration |
B. | Same value of highest principal quantum number |
C. | Same number of nucleons |
D. | All of the mentioned |
Answer» B. Same value of highest principal quantum number | |
11. |
Avogadro’s number of water molecules occupy 22.4 liters of space at 273 K |
A. | True |
B. | False |
Answer» C. | |
12. |
Species with the same number of neutrons but the different number of protons are called: |
A. | Isotones |
B. | Isotopes |
C. | Isomers |
D. | Isobars |
Answer» B. Isotopes | |
13. |
Avogadro’s number of water molecules occupy 22.4 liters of space at 273 K. |
A. | True |
B. | False |
Answer» C. | |
14. |
One unified atomic mass unit equals: |
A. | 1/12 of molar mass of Carbon |
B. | 1/16 of atomic mass of Oxygen |
C. | molecular mass of Hydrogen |
D. | all of the mentioned |
Answer» C. molecular mass of Hydrogen | |
15. |
Which if the following is not an SI unit? |
A. | Kilogram |
B. | Mole |
C. | Atomic Mass Unit |
D. | Coulomb |
Answer» D. Coulomb | |
16. |
Which of the following is not a pure form of matter? |
A. | Element |
B. | Compound |
C. | Solution |
D. | Both Compound and Solution |
Answer» D. Both Compound and Solution | |
17. |
Which of the following has the least number of atoms? |
A. | One gram of Hydrogen gas |
B. | One gram of Helium gas |
C. | One gram-mole of Oxygen gas |
D. | One gram-mole of Chlorine gas |
Answer» C. One gram-mole of Oxygen gas | |
18. |
Oxygen gas is denser than Carbon Dioxide gas? |
A. | True |
B. | False |
Answer» C. | |
19. |
Atomic number of a species is the number of: |
A. | Neutrons |
B. | Protons |
C. | Valence electrons |
D. | Nucleons |
Answer» C. Valence electrons | |
20. |
Species with the same number of neutrons but the different number of protons are called: |
A. | Isotones |
B. | Isotopes |
C. | Isomers |
D. | Isobars |
Answer» B. Isotopes | |
21. |
Calcium is an isobar of Argon. They differ in: |
A. | Atomic weight |
B. | Number of nucleons |
C. | Number of neutrons |
D. | None of the mentioned |
Answer» D. None of the mentioned | |
22. |
Various isotopes of a given element have same: |
A. | Number of protons |
B. | Number of neutrons |
C. | Molar mass |
D. | Thermodynamic stability |
Answer» B. Number of neutrons | |
23. |
Which of the following is true for polymers? |
A. | They have very high molecular mass |
B. | They do not have a linear stress-strain curve |
C. | They have high strength to mass ratio |
D. | All of the mentioned |
Answer» E. | |
24. |
Which of the following cannot be used as bio-materials? |
A. | Metals |
B. | Ceramics |
C. | Polymers |
D. | None of the mentioned |
Answer» E. | |
25. |
Ceramics make excellent refractory materials. A material is said to be refractory if it: |
A. | resists the flow of electric current |
B. | has high refractive index |
C. | retains its strength at high temperatures |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
26. |
GFRP is an important composite. It stands for |
A. | Gelatin Fibre Reinforced Polymer |
B. | Graphite Fibre Reinforced Polymer |
C. | Germanium Fibre Reinforced Polymer |
D. | Glass Fibre Reinforced Polymer |
Answer» E. | |
27. |
Steels mainly contain iron and carbon. Under which of the following categories do they belong? |
A. | Metallic Solid |
B. | Polymer |
C. | Composites |
D. | Ceramics |
Answer» B. Polymer | |
28. |
In terms of which of the following properties, metals are better than ceramics? |
A. | Hardness |
B. | Ductility |
C. | Toughness |
D. | Yield Strength |
Answer» C. Toughness | |
29. |
The phase above eutectoid temperature for carbon steels is known as _______ |
A. | Cementite |
B. | Ferrite |
C. | Pearlite |
D. | Austentite |
Answer» E. | |
30. |
What is the eutectoid structure of Iron? |
A. | Cementite |
B. | Ferrite |
C. | Pearlite |
D. | Austentite |
Answer» D. Austentite | |
31. |
Any composition left and right of P will generate ___________ |
A. | Excess of liquid and α |
B. | Excess of α and liquid |
C. | Excess of liquid and β |
D. | Excess of β and liquid |
Answer» C. Excess of liquid and β | |
32. |
At what temperature, all liquid and αwill convert to β? |
A. | Eutectic temperature |
B. | Peritectic temperature |
C. | Eutectoid temperature |
D. | Peritectoid temperature |
Answer» C. Eutectoid temperature | |
33. |
Which phase will crystallize first just below the liquidus line? |
A. | α phase |
B. | β phase |
C. | (L+α) phase |
D. | (L+β) phase |
Answer» B. β phase | |
34. |
A first solid phase results in a second solid plus another third solid phase upon heating during __________ reaction. |
A. | Eutectoid |
B. | Peritectic |
C. | Eutectic |
D. | Peritectoid |
Answer» E. | |
35. |
A first solid phase results in a second solid phase another third solid phase on cooling during __________ reaction. |
A. | Eutectoid |
B. | Peritectic |
C. | Eutectic |
D. | Peritectoid |
Answer» B. Peritectic | |
36. |
On heating, one solid phase results in another solid phase and a liquid phase during __________ reaction. |
A. | Eutectoid |
B. | Peritectic |
C. | Eutectic |
D. | Peritectoid |
Answer» C. Eutectic | |