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Entry Test MCQ :: The Halogens and The Noble Gases


11.  Which is the strongest acid?
A. HCIO B. HCIO2
C. HCIO3 D. HCIO4

12.  Bromine can be liberated from KBr solution by the action of
A. Iodine solution B. Chlorine
C. NaCl D. Ki

13.  Bleaching powder is an example of
A. Normal salt B. Double salt
C. Mixed salt D. Complex

14.  Consider the following reaction- 2KCIO3 + H2C2O4 + H2SO4 ? K2SO4 + 2H2O + 2CO2 + Oxide Which oxide of chlorine is produced in the above reaction?
A. Cl2O B. ClO2
C. Cl2O6 D. Cl2O7

15.  Which of the following oxides of iodine is used for quantitative analysis of CO?
A. I2O4 B. I4O2
C. I2O5 D. All are equally useful

16.  Consider the following reaction- 3Cl2 + 6NaOH ? NaClO3 + 5NaCl + 3H2O This reaction is
A. Displacement reaction B. Double displacement reaction
C. Disproportionation reaction D. Reduction reaction

17.  Which of the halogen has highest electronegativity?
A. Fluorine B. Chlorine
C. Bromine D. Iodine

18.  Which of the halogen can displace other three elements?
A. Flourine B. Chlorine
C. Iodine D. Bromine

19.  Which of the following statements is incorrect about halogens?
A. All are non-metals B. All the halogens have electronic conviguration ns2p5
C. They have high electron attinity and ionization energy D. All the halogens react with noble gases to form their halides

20.  The chemical formula of sodium hypochlorite is
A. NaCLO B. NaClO2
C. NaClO3 D. NaClO4




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