1) Nitrogen is chemically inert. Why? a) A Due to presence of double bond require more energy to break b) B Triple bond requires less energy to break c) C Due to presence of triple bond require more energy to break 2) Nitrogen and phosphorus are a) non metals b) metals c) metalloids 3) In group 15 elements as we move down the group a) non metallic character increase b) metallic character increase c) metalloid character increase 4) Among the oxides of 15th group , which is more acidic? a) oxides of bismuth b) oxides of phosphorus c) oxides of arsenic 5) Down the group 15 element, + 5 is highly stable due to inert pair effect a) true b) false 6) General Electronic Configuration of Nitrogen family a) ns1 np3 b) ns3 np2 c) ns2 np3 7) Nitrogen cannot exhibit co valancy more than four due to a) presence of vacant d orbitals b) absence of vacant d orbitals c) large size 8) Which element has possess high electronegativity? a) P b) N c) As 9) Bismuth forms stable compound in +3 state than in +5 state . Why? a) uniqueness principles b) inert pair effect c) diagonal effect 10) Nitrogen is diatomic due to a) multiple bond within itself b) small size c) absence of vacant d orbitals 11) Pnictogens are elements of _________ and chalcogens are elements of _________ a) Group 15, group 16 b) Group 16, group 15 12) Correct order of negative Electron Gain Enthalpy is a) Po < Te < O < Se < S b) O < Po < Te < Se < S c) Po < Te < Se < S < O 13) Sulfur dioxide dissolves in water to give ____________ a) sulfur trioxide b) insoluble in water c) sulfurous acid 14) Sulfur has many forms, which is why it is considered to be __________ a) amorphous b) allotropic c) monoclinic 15) Sulfur can be added to the atmosphere by a) decomposition b) nitrogen fixing bacteria c) burning coal, oil and gasoline 16) Which compound is responsible for the smell of rotten eggs in the reaction of concentrated sulfuric acid with NaI? a) SO2 fumes b) H2S fumes c) H2Se fumes 17) O3 acts as a powerful oxidising agent because a) it liberates atoms of nascent oxygen (O3 → O2 + O) b) its decomposition into oxygen results in the liberation of heat c) ozone is thermodynamically unstable 18) The stability of +6 oxidation state decreases and that of +4 increases down the Oxygen group due to a) electron gain enthalpy decreases b) inert pair effect c) electronegativity increases 19) What is the oxidation number of Oxygen in OF2? a) +2 b) -2 c) +1 20) Acidic nature of hydrides and reducing property increase from a) H2S<H2Se<H2O<H2Te<H2Po b) H2Po<H2Te<H2Se<H2S<H2O c) H2O<H2S<H2Se<H2Te<H2Po 21) Which of the following is a solid at room temperature? a) chlorine b) bromine c) iodine 22) Which halogen has the lowest melting point? a) Chlorine b) Fluorine c) Iodine 23) How is the appearance of bromine? a) brown liquid b) purple solid c) yellow gas 24) Which of the following is correct relating to volatility of halogens? a) Volatility increases going down the group b) Volatility decreases going down the group c) Volatility is not affected by van der waals forces 25) Chlorine gas reacts with water to form a ___________________ a) yellow coloured solution b) solution of pH 12 c) solution that bleaches the colour of litmus paper 26) Which of the following has the lower van der waals forces than chlorine? a) fluorine b) bromine c) iodine d) astatine 27) L and M are diatomic elements. L is less reactive than M. Which of the following elements are L and M? a) L= Bromine; M= Iodine b) L= Iodine; M= Bromine c) L= Sodium; M= Potassium 28) Which of the following properties decreases going down the group? a) Boiling point b) Reactivity c) Melting point 29) Which of the following is the correct reaction between halogens and hydrogen? a) H + Cl → HCl b) H2 + Cl2→ 2HCl c) 1/2H2 + 1/2Cl2 → HCl d) 1 e) ​ f) H 30) All the properties listed below are TRUE for fluorine EXCEPT a) fluorine exists as discrete F2 molecule b) HF is a weak acid c) fluorine exhibits oxidation states ranging from -1 to +7 in its compounds

Group 15, 16 & 17 Elements

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