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Q: Most of the oxides of non-metals combine with water to form: (2012 ETEA)

A) Hydrogen gas

B) Salt and water

C) a base

D) An acid

Answer: D. An acid

Q: Fajan's rule states that small highly charged ions tend to form more: (2012 ETEA)

A) Ionic compounds

B) Polymeric compounds

C) Covalent compounds

D) Coordination compounds

Answer: C. Covalent compounds

Q: The behavior of PbCl₂ and PbCl₄ respectively are: (2012 ETEA)

A) Ionic and covalent

B) Covalent and ionic

C) Covalent and coordinate covalent

D) Ionic and coordinate covalent

Answer: A. Ionic and covalent

Q: Beryllium of alkaline earth metal is almost as hard as: (2012 ETEA)

A) Calcium

B) Potassium

C) Iron

D) Magnesium

Answer: C. Iron

Q: Beryllium, an alkaline earth metal, resists complete oxidation because: (2012 ETEA)

A) It is less reactive

B) The oxidation process is slow

C) It forms a hard protective coat of BeO

D) None of the above

Answer: C. It forms a hard protective coat of BeO

Q: Which oxide of sodium metal predominantly forms in oxygen? (2012 ETEA)

A) Na₂O

B) Na₂O₂

C) Na₂O₃

D) NaO₂

Answer: B. Na₂O₂

Q: Select the correct statement about alkali metal hydroxides: (2012 ETEA)

A) All alkali metal hydroxides are unstable to heat

B) All alkali metal hydroxides are stable to heat except CsOH

C) All alkali metal hydroxides are stable to heat except LiOH

D) All alkali metal hydroxides are stable to heat

Answer: C. All alkali metal hydroxides are stable to heat except LiOH

Q: Choose the interhalogen compound: (2012 ETEA)

A) OF₂

B) BrF₅

C) HI

D) HgBr₃

Answer: B. BrF₅

Q: In which of the following a covalent bond is not likely to exist? (2012 ETEA)

A) Br₂

B) SiF₄

C) CaO

D) CH₄

Answer: C. CaO

Q: The oxide of chlorine, Cl₂O₂, in nature is: (2012 ETEA)

A) Strongly basic

B) Weakly basic

C) Strongly acidic

D) Weakly acidic

Answer: C. Strongly acidic

Q: Select an element which exists in liquid state at room temperature: (2013 ETEA)

A) Cl₂

B) F₂

C) Br₂

D) I₂

Answer: C. Br₂

Q: Which one will show ionic bonding? (2013 ETEA)

A) NaH

B) PbCl₂

C) HCl (gas)

D) PCl₃

Answer: A. NaH

Q: Select the oxide which will be acidic in nature ? (2013 ETEA)

A) P₂O₅

B) CaO

C) K₂O

D) BaO

Answer: A. P₂O₅

Q: Choose the correct order of decreasing basic strength: (2013 ETEA)

A) MgO>Na₂O>P₄O₁₀>Al₂O₃

B) Na₂O>MgO>Al₂O₃>P₄O₁₀

C) P₄O₁₀>Na₂O>MgO>Al₂O₃

D) Al₂O₃>MgO>P₄O₁₀>Na₂O

Answer: B. Na₂O>MgO>Al₂O₃>P₄O₁₀

Q: Molecular formula of silica is: (2013 ETEA)

A) SiO₄

B) SiO₃

C) SiO₂

D) NaAlO₂

Answer: C. SiO₂

Q: Which one of the following oxides exhibits amphoteric properties? (2014 ETEA)

A) K₂O

B) MgO

C) ZnO

D) CaO

Answer: C. ZnO

Q: Which one of the following is the strongest acid? (2014 ETEA)

A) HClO

B) HClO₂

C) HClO₃

D) HClO₄

Answer: D. HClO₄

Q: Lime water is saturated solution of: (2014 ETEA)

A) Mg(OH)₂

B) Ca(OH)₂

C) Ba(OH)₂

D) KOH

Answer: B. Ca(OH)₂

Q: Which one of the following is most ionic? (2014 ETEA)

A) NaCl

B) MgCl₂

C) KCl

D) AlCl₃

Answer: C. KCl

Q: Electronegativity of aluminum is nearly equal to that of: (2014 ETEA)

A) Be

B) B

C) Mg

D) K

Answer: A. Be