Free MCQs & Online Quiz Practice for Exams

Q: Which of the following elements has lowest first ionization energy? (2019 ETEA)

A) N

B) O

C) C

D) ?

Q: Which oxide of K contains more oxygen than its normal oxide? (2019 ETEA)

A) Peroxide

B) Superoxide

C) Both contain equal quantity

D) None

Q: How many elements are there in the 3rd period of periodic table? (2019 ETEA)

A) 18

B) 8

C) 32

D) 10

Q: Which one of the following elements has the largest second ionization energy? (2019 ETEA)

A) O

B) F

C) Na

D) Ne

Q: Which equation relates to the first ionization energy of bromine? (2019 ETEA)

A) Br → Br⁺ + e⁻

B) Br → Br⁻ + e⁻

C) Br → Br⁰ + e⁻

D) Br₂ → Br⁺ + e⁻

Q: CO₂ is gas at room temperature but SiO₂ is solid. The reason is that: (2019 ETEA)

A) SiO₂ is ionic

B) Bonds in SiO₂ are very strong

C) Allotros (typo)

D) Both (b) and (c)

Q: Which one of the following has highest melting point? (2019 ETEA)

A) NaCl

B) MgCl₂

C) AlCl₃

D) SiCl₄

Q: Metal sulfate that is comparatively more soluble in water is: (2019 ETEA)

A) MgSO₄

B) CaSO₄

C) BaSO₄

D) SrSO₄

Q: Fe²⁺ will form the most ionic bond with: (2019 ETEA)

A) N³⁻

B) S²⁻

C) P³⁻

D) F⁻

Q: The first ionization energy is maximum for: (2020 ETEA)

A) Na

B) Mg

C) Al

D) K

Q: Which one is covalent in nature? (2020 ETEA)

A) PbCl₂

B) SnCl₂

C) SnCl₄

D) NaCl

Q: Potassium, Rubidium, Cesium react with oxygen to form which types of oxides? (2020 ETEA)

A) Peroxide

B) Superoxide

C) Suboxide

D) Normal oxide

Q: Which of the following has the highest value of electronegativity? (2020 ETEA)

A) I

B) Br

C) Cl

D) F

Q: Which pair has 1 electron in its "s" orbital? (2020 ETEA)

A) Li & Fe

B) Na & Cr

C) Se & Mn

D) H & He

Q: Nitrogen dioxide is produced on decomposition of nitrates of: (2020 ETEA)

A) Li

B) Na

C) K

D) Rb

Q: Ester is represented by the general formula (2005 ETEA)

A) ROR

B) RCOR

C) RCOOR

D) RCOOH

Q: Which one of the following is cycloalkane? (2005 ETEA)

A) C₈H₁₄

B) C₈H₁₂

C) C₇H₁₀

D) C₆H₈

Q: All the compounds are inorganic except (2009 ETEA)

A) CaCO₃

B) CaC₂

C) KCN

D) (NH₂)₂CO

Q: When coal is heated (500–1000°C) in the absence of air the process is called (2010 ETEA)

A) Distillation

B) Carbonization

C) Cracking

D) Reforming

Q: Quality of fuel is judged from its octane number, the best fuels are (2010 ETEA)

A) Straight chain hydrocarbons

B) Branched chain hydrocarbons

C) Cyclic compounds

D) Aromatic