JEE Main & Advanced Chemistry The s-Block Elements / s-ब्लॉक के तत्व Question Bank

done Critical Thinking Total Questions - 71

• question_answer1)
  The correct sequence in decreasing order of the percentage of nitrogen in the given compounds is [NDA 1999]
  A)
  Urea > Ammonium chloride > Ammonium nitrate > Ammonium nitrite done clear
  B)
  Urea > Ammonium nitrate > Ammonium nitrite > Ammonium chloride done clear
  C)
  Urea > Ammonium nitrite > Ammonium nitrate > Ammonium chloride done clear
  D)
  Urea > Ammonium nitrite > Ammonium chloride > Ammonium nitrate   done clear
  View Solution play_arrow

• question_answer2)
  As the alkaline earth metals (except Be) tend to lose their valence electrons readily they act as [Kerala (Med.) 2002]
  A)
  Weak oxidising agent done clear
  B)
  Weak reducing agent done clear
  C)
  Strong oxidising agent done clear
  D)
  Strong reducing agent done clear
  View Solution play_arrow

• question_answer3)
  The first ionisation energies of alkaline earth metals are higher than those of the alkali metals. This is because [UPSEAT 2001]
  A)
  There is increases in the nuclear charge of the alkaline earth metals done clear
  B)
  There is decreases in the nuclear charge of the alkaline earth metals done clear
  C)
  There is no change in the nuclear charge done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer4)
  Lead is maximum in [BVP 2004]
  A)
  Soda glass done clear
  B)
  Jena glass done clear
  C)
  Pyrex glass done clear
  D)
  Flint glass done clear
  View Solution play_arrow

• question_answer5)
  \[BaS{{O}_{4}}\] and carbon on heating reacts to produce [Pb. PMT 2004]
  A)
  \[Ba+S{{O}_{2}}+C{{O}_{2}}\] done clear
  B)
  \[BaS+CO\] done clear
  C)
  \[BaS+{{O}_{2}}+S{{O}_{2}}\] done clear
  D)
  \[BaC{{O}_{3}}+S+{{O}_{2}}\] done clear
  View Solution play_arrow

• question_answer6)
  The atomic radii of alkali metals (M) lie in the order \[Li<Na<K<Rb\] but the radii of \[{{M}^{+}}\] ions in aqueous solution lie in the reverse order \[L{{i}^{+}}>N{{a}^{+}}>{{K}^{+}}>R{{b}^{+}}\]. What is the reason for this reverse order (on going from \[Li\] to\[Rb)\]? [MP PMT 1997]
  A)
  Gradual increase in ionisation energy done clear
  B)
  Increasing weakness of the metallic bond done clear
  C)
  Increasing electropositive character done clear
  D)
  Decreasing degree of hydration done clear
  View Solution play_arrow

• question_answer7)
  Fusion mixture is [CPMT 2002]
  A)
  \[N{{a}_{2}}C{{O}_{3}}+{{K}_{2}}C{{O}_{3}}\] done clear
  B)
  \[N{{a}_{2}}C{{O}_{3}}\]\[+NaHC{{O}_{3}}\] done clear
  C)
  \[N{{a}_{2}}C{{O}_{3}}+NaOH\] done clear
  D)
  \[N{{a}_{2}}C{{O}_{3}}+{{K}_{2}}S{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer8)
  Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it is that [AIEEE 2003]
  A)
  Concentrated hydrochloric acid emits strongly smelling \[HCl\] gas all the time done clear
  B)
  Oxygen in air reacts with the emitted \[HCl\] gas to form a cloud of chlorine gas done clear
  C)
  Strong affinity of \[HCl\] gas for moisture in air results in forming of droplets of liquid solution which appears like a cloudy smoke done clear
  D)
  Due to strong affinity for water, concentrated hydrochloric acid pulls moisture of air towards itself. This moisture forms droplets of water and hence the cloud done clear
  View Solution play_arrow

• question_answer9)
  Match List I with List II and select the correct answer using the codes given below the lists List I List II

  List - I		List - II
  (A)	Peroxide	(1)	\[{{C}_{3}}{{O}_{2}}\]
  (B)	Superoxide	(2)	\[Pb{{O}_{2}}\]
  (C)	Dioxide	(3)	\[K{{O}_{2}}\]
  (D)	Suboxide	(4)	\[{{H}_{2}}{{O}_{2}}\]

  Codes: [NDA 1999]
  A)
  A-4        B-3      C-2      D-1 done clear
  B)
  A-3        B-2      C-1      D-4 done clear
  C)
  A-4        B-2      C-3      D-1 done clear
  D)
  A-4        B-1      C-2      D-3 done clear
  View Solution play_arrow

• question_answer10)
  The most efficient agent for the absorption of \[S{{O}_{3}}\] is [KCET 1998]
  A)
  \[98%{{H}_{2}}S{{O}_{4}}\] done clear
  B)
  \[80%{{H}_{2}}S{{O}_{4}}\] done clear
  C)
  \[20%\]oleum done clear
  D)
  \[90%{{H}_{2}}S{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer11)
  Mark the oxide which is amphoteric in character [MP PMT 2000]
  A)
  \[C{{O}_{2}}\] done clear
  B)
  \[Si{{O}_{2}}\] done clear
  C)
  \[Sn{{O}_{2}}\] done clear
  D)
  \[Ca{{O}_{{}}}\] done clear
  View Solution play_arrow

• question_answer12)
  Concentrated aqueous sodium hydroxide can separate mixture of [MNR 1995]
  A)
  \[A{{l}^{3+}}\] and \[S{{n}^{2+}}\] done clear
  B)
  \[A{{l}^{3+}}\] and \[F{{e}^{3+}}\] done clear
  C)
  \[A{{l}^{3+}}\] and \[Z{{n}^{2+}}\] done clear
  D)
  \[Z{{n}^{2+}}\] and \[P{{b}^{2+}}\] done clear
  View Solution play_arrow

• question_answer13)
  The composition of the common glass is [DCE 2004]
  A)
  \[N{{a}_{2}}O.CaO.6Si{{O}_{3}}\] done clear
  B)
  \[N{{a}_{2}}O.A{{l}_{2}}{{O}_{3}}.Si{{O}_{2}}\] done clear
  C)
  \[CaO.A{{l}_{2}}{{O}_{3}}.Si{{O}_{2}}\] done clear
  D)
  \[N{{a}_{2}}O.CaO.6Si{{O}_{2}}\] done clear
  View Solution play_arrow

• question_answer14)
  The metal which does not form ammonium nitrate by reaction with dilute nitric acid is [KCET 2004]
  A)
  Al done clear
  B)
  Fe done clear
  C)
  Pb done clear
  D)
  Mg done clear
  View Solution play_arrow

• question_answer15)
  Total number of lone pair of electrons in \[XeO{{F}_{4}}\] is [IIT-JEE (Screening) 2004]
  A)
  0 done clear
  B)
  1 done clear
  C)
  2 done clear
  D)
  3 done clear
  View Solution play_arrow

• question_answer16)
  What is the correct relationship between the pHs of isomolar solutions of sodium oxide \[(p{{H}_{1}}),\] sodium sulphide \[(p{{H}_{2}}),\] sodium selenide \[(p{{H}_{3}})\] and sodium telluride \[(p{{H}_{4}})\] [CBSE PMT 2005]
  A)
  \[p{{H}_{1}}>p{{H}_{2}}=p{{H}_{3}}>p{{H}_{4}}\] done clear
  B)
  \[p{{H}_{1}}<p{{H}_{2}}<p{{H}_{3}}<p{{H}_{4}}\] done clear
  C)
  \[p{{H}_{1}}<p{{H}_{2}}<p{{H}_{3}}=p{{H}_{4}}\] done clear
  D)
  \[p{{H}_{1}}>p{{H}_{2}}>p{{H}_{3}}>p{{H}_{4}}\] done clear
  View Solution play_arrow

• question_answer17)
  Which one of the following is not an amphoteric substance [KCET 2004]
  A)
  \[HN{{O}_{3}}\] done clear
  B)
  \[HCO_{3}^{-}\] done clear
  C)
  \[{{H}_{2}}O\] done clear
  D)
  \[N{{H}_{3}}\] done clear
  View Solution play_arrow

• question_answer18)
  Which group is called buffer group of the periodic table [Pb. CET 2004]
  A)
  I done clear
  B)
  VII done clear
  C)
  VIII done clear
  D)
  Zero done clear
  View Solution play_arrow

• question_answer19)
  Which of the following salt is insoluble in water [MP PET 2004]
  A)
  \[CuS{{O}_{4}}\] done clear
  B)
  \[CdS{{O}_{4}}\] done clear
  C)
  \[PbS{{O}_{4}}\] done clear
  D)
  \[B{{i}_{2}}{{(S{{O}_{4}})}_{3}}\] done clear
  View Solution play_arrow

• question_answer20)
  Which of the following oxides is the most acidic [CBSE PMT 1999; MP PMT 2002]
  A)
  \[{{N}_{2}}{{O}_{5}}\] done clear
  B)
  \[{{P}_{2}}{{O}_{5}}\] done clear
  C)
  \[A{{s}_{2}}{{O}_{5}}\] done clear
  D)
  \[S{{b}_{2}}{{O}_{5}}\] done clear
  View Solution play_arrow

• question_answer21)
  Whose bond energy is maximum [CPMT 1988; MP PMT 1990]
  A)
  \[{{F}_{2}}\] done clear
  B)
  \[C{{l}_{2}}\] done clear
  C)
  \[B{{r}_{2}}\] done clear
  D)
  \[{{I}_{2}}\] done clear
  View Solution play_arrow

• question_answer22)
  Calcium cyanide on treatment with steam under pressure gives \[N{{H}_{3}}\] and [DPMT 2002]
  A)
  \[CaHC{{O}_{3}}\] done clear
  B)
  \[CaO\] done clear
  C)
  \[Ca{{(OH)}_{2}}\] done clear
  D)
  \[CaC{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer23)
  Six volumes of oxygen, on complete ozonisation, form ...... volumes of ozone [DPMT 2000]
  A)
  4 done clear
  B)
  3 done clear
  C)
  2 done clear
  D)
  6 done clear
  View Solution play_arrow

• question_answer24)
  The substance not likely to contain \[CaC{{O}_{3}}\] is [AIEEE 2003]
  A)
  A marble statue done clear
  B)
  Calcined gypsum done clear
  C)
  Sea shells done clear
  D)
  Dolomite done clear
  View Solution play_arrow

• question_answer25)
  Which of the following statements is false for alkali metals [MNR 1994; MP PET 2001]
  A)
  Lithium is the strongest reducing agent done clear
  B)
  \[Na\] is amphoteric in nature done clear
  C)
  \[L{{i}^{+}}\] is exceptionally small done clear
  D)
  All alkali metals give blue solution in liquid ammonia done clear
  View Solution play_arrow

• question_answer26)
  Solubility of iodine in water is greatly increased by the addition of iodide ions because of the formation of ...... [IIT 1994]
  A)
  \[{{I}_{2}}\] done clear
  B)
  \[{{I}_{3}}\] done clear
  C)
  \[{{I}_{3}}^{-}\] done clear
  D)
  \[{{I}^{-}}\] done clear
  View Solution play_arrow

• question_answer27)
  The solubility in water of sulphates down the \[Be\] group is \[Be>Mg>>Ca>Sr>Ba\]. This is due to [CBSE PMT 1995]
  A)
  High heat of solvation for smaller ions like \[B{{e}^{2+}}\] done clear
  B)
  Increasing molecular weight done clear
  C)
  Decreasing lattice energy done clear
  D)
  Increase in melting points done clear
  View Solution play_arrow

• question_answer28)
  Magnesium burns in air to give [CPMT 1988, 89; AFMC 1987]
  A)
  \[MgO\] done clear
  B)
  \[M{{g}_{3}}{{N}_{2}}\] done clear
  C)
  \[MgC{{O}_{3}}\] done clear
  D)
  \[MgO\] and \[M{{g}_{3}}{{N}_{2}}\] both done clear
  View Solution play_arrow

• question_answer29)
  Philospher's wool when heated with \[BaO\] at \[{{1100}^{o}}C\] gives a compound. Identify the compound [CPMT 1997]
  A)
  \[BaZn{{O}_{2}}\] done clear
  B)
  \[Ba+Zn{{O}_{2}}\] done clear
  C)
  \[BaCd{{O}_{2}}\] done clear
  D)
  \[Ba{{O}_{2}}+Zn\] done clear
  View Solution play_arrow

• question_answer30)
  Which of the following oxide is diamagnetic [MP PET 1990]
  A)
  \[NO\] done clear
  B)
  \[N{{H}_{3}}\] done clear
  C)
  \[{{N}_{2}}{{H}_{4}}\] done clear
  D)
  \[{{N}_{2}}{{H}_{2}}\] done clear
  View Solution play_arrow

• question_answer31)
  Which of the following salt becomes plaster of paris on being appropriately hydrated [CPMT 1985]
  A)
  \[ZnC{{O}_{3}}\] done clear
  B)
  \[CaS{{O}_{4}}\] done clear
  C)
  \[MgS{{O}_{4}}\] done clear
  D)
  \[CaC{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer32)
  The number of electron and proton in the third alkaline earth metal ion will be [MP PET 2003]
  A)
  \[\frac{e}{20},\,\,\frac{p}{20}\] done clear
  B)
  \[\frac{e}{18},\,\,\frac{p}{20}\] done clear
  C)
  \[\frac{e}{18},\,\,\frac{p}{18}\] done clear
  D)
  \[\frac{e}{19},\,\,\frac{p}{20}\] done clear
  View Solution play_arrow

• question_answer33)
  The compounds of alkaline earth metals have the following magnetic nature [MP PET/PMT 1998; RPMT 2000; JIPMER 2002]
  A)
  Diamagnetic done clear
  B)
  Paramagnetic done clear
  C)
  Ferromagnetic done clear
  D)
  Diaferromagnetic done clear
  View Solution play_arrow

• question_answer34)
  Which of the following is the life saving mixture for an asthma patient [MP PMT 2001]
  A)
  Mixture of helium and oxygen done clear
  B)
  Mixture of neon and oxygen done clear
  C)
  Mixture of xenon and nitrogen done clear
  D)
  Mixture of argon and oxygen done clear
  View Solution play_arrow

• question_answer35)
  Which would quickly absorbs oxygen [CBSE PMT 1992; MP PET 1995]
  A)
  Alkaline solution of pyrogallol done clear
  B)
  Conc. \[{{H}_{2}}S{{O}_{4}}\] done clear
  C)
  Lime water done clear
  D)
  Alkaline solution of \[CuS{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer36)
  Nitrogen is liberated by the thermal decomposition of only [IIT 1991]
  A)
  \[N{{H}_{4}}N{{O}_{2}}\] done clear
  B)
  \[Na{{N}_{3}}\] done clear
  C)
  \[{{(N{{H}_{4}})}_{2}}C{{r}_{2}}{{O}_{7}}\] done clear
  D)
  All the three done clear
  View Solution play_arrow

• question_answer37)
  Red phosphorus is less reactive than yellow phosphorus because [DPMT 1982; JIPMER 1999;CBSE PMT 1999; RPET 2003]
  A)
  Its colour is red done clear
  B)
  It is highly polymerized done clear
  C)
  It is hard done clear
  D)
  It is insoluble in \[{{C}_{2}}{{H}_{5}}OH\] done clear
  View Solution play_arrow

• question_answer38)
  Carbon differs from other elements of the group. Which is the false statement [DPMT 2000]
  A)
  Due to its marked tendency to form long chains (catenation) done clear
  B)
  Due to its unique ability to form multiple bonds done clear
  C)
  Due to d-orbital in penultimate shell done clear
  D)
  Due to its limitation of co-ordination number 4 done clear
  View Solution play_arrow

• question_answer39)
  Which of the following oxide does not form acidic aqueous solution [CPMT 2004]
  A)
  \[{{N}_{2}}{{O}_{3}}\] done clear
  B)
  \[N{{O}_{2}}\] done clear
  C)
  \[{{N}_{2}}{{O}_{5}}\] done clear
  D)
  NO done clear
  View Solution play_arrow

• question_answer40)
  Which of the following is in the increasing order of the ionic character [JIPMER 2002]
  A)
  \[PbC{{l}_{4}}<PbC{{l}_{2}}<CaC{{l}_{2}}<NaCl\] done clear
  B)
  \[PbC{{l}_{2}}<PbC{{l}_{4}}<CaC{{l}_{2}}<NaCl\] done clear
  C)
  \[PbC{{l}_{2}}<PbC{{l}_{4}}<NaCl<CaC{{l}_{2}}\] done clear
  D)
  \[PbC{{l}_{4}}<PbC{{l}_{2}}<NaCl<CaC{{l}_{2}}\] done clear
  View Solution play_arrow

• question_answer41)
  Silicon chloroform is prepared by [MH CET 1999]
  A)
  \[Si+HCl\] done clear
  B)
  \[SiC{{l}_{4}}\]+\[{{H}_{2}}O\] done clear
  C)
  \[Si{{F}_{4}}\]+\[NaF\] done clear
  D)
  \[{{H}_{2}}Si{{F}_{6}}+C{{l}_{2}}\] done clear
  View Solution play_arrow

• question_answer42)
  \[K{{O}_{2}}\] (potassium superoxide) is used in oxygen cylinders in space and submarines because it [AIEEE 2002]
  A)
  Absorbs \[C{{O}_{2}}\]and increases \[{{O}_{2}}\] content done clear
  B)
  Eliminates moisture done clear
  C)
  Absorbs \[C{{O}_{2}}\] done clear
  D)
  Produces ozone done clear
  View Solution play_arrow

• question_answer43)
  Fire extinguishers contain \[{{H}_{2}}S{{O}_{4}}\] and [AFMC 1980]
  A)
  \[CaC{{O}_{3}}\] done clear
  B)
  \[N{{a}_{2}}C{{O}_{3}}\] done clear
  C)
  \[NaHC{{O}_{3}}\] done clear
  D)
  \[NaHC{{O}_{3}}\] and \[N{{a}_{2}}C{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer44)
  Which is insoluble in water [CPMT 2003]
  A)
  \[{{H}_{2}}S\] done clear
  B)
  \[HgC{{l}_{2}}\] done clear
  C)
  \[Ca{{(N{{O}_{3}})}_{2}}\] done clear
  D)
  \[Ca{{F}_{2}}\] done clear
  View Solution play_arrow

• question_answer45)
  Which of the following halides is most acidic [KCET 1996]
  A)
  \[PC{{l}_{3}}\] done clear
  B)
  \[SbC{{l}_{3}}\] done clear
  C)
  \[BiC{{l}_{3}}\] done clear
  D)
  \[CC{{l}_{4}}\] done clear
  View Solution play_arrow

• question_answer46)
  The stability of the following alkali metal chlorides follows the order [MP PET/PMT 1998]
  A)
  \[LiCl>KCl>NaCl>CsCl\] done clear
  B)
  \[CsCl>KCl>NaCl>LiCl\] done clear
  C)
  \[NaCl>KCl>LiCl>CsCl\] done clear
  D)
  \[KCl>CsCl>NaCl>LiCl\] done clear
  View Solution play_arrow

• question_answer47)
  The reaction of \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}\] with iodine gives [CPMT 1971, 80, 81; DPMT 1983, 90; MP PMT 1985; EAMCET 1990; BHU 1980]
  A)
  Sodium sulphide done clear
  B)
  Sodium sulphite done clear
  C)
  Sodium sulphate done clear
  D)
  Sodium tetrathionate done clear
  View Solution play_arrow

• question_answer48)
  Which one of the following is the true covalent oxide of iodine [MP PET/PMT 1988]
  A)
  \[{{I}_{2}}{{O}_{4}}\] done clear
  B)
  \[{{I}_{2}}{{O}_{5}}\] done clear
  C)
  \[{{I}_{2}}{{O}_{7}}\] done clear
  D)
  \[{{I}_{2}}{{O}_{9}}\] done clear
  View Solution play_arrow

• question_answer49)
  Lithium aluminium hydride acts as [CPMT 1994]
  A)
  Oxidising agent done clear
  B)
  Reducing agent done clear
  C)
  Both the above done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer50)
  The mixture of conc. HCl and potassium chlorate on heating gives [Roorkee 2000]
  A)
  \[C{{l}_{2}}\] only done clear
  B)
  \[Cl{{O}_{2}}\]only done clear
  C)
  \[C{{l}_{2}}+Cl{{O}_{2}}\] done clear
  D)
  \[C{{l}_{2}}+Cl{{O}_{2}}+Cl{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer51)
  When \[S{{O}_{2}}\] is passed through acidified solution of \[{{H}_{2}}S\] [CPMT 1973, 81, 93]
  A)
  \[{{H}_{2}}S{{O}_{4}}\] is formed done clear
  B)
  \[{{H}_{2}}S{{O}_{3}}\] is formed done clear
  C)
  Sulphur is precipitated done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer52)
  Four reactions are given below (i)\[2Li+2{{H}_{2}}O\to 2LiOH+{{H}_{2}}\] (ii)\[2Na+2{{H}_{2}}O\to 2NaOH+{{H}_{2}}\] (iii)\[2LiN{{O}_{3}}\xrightarrow{Heat}2LiN{{O}_{2}}+{{O}_{2}}\] (iv)\[2NaN{{O}_{3}}\xrightarrow{Heat}2NaN{{O}_{2}}+{{O}_{2}}\] Which of the above, if any, is wrong
  A)
  (iv) done clear
  B)
  (iii) done clear
  C)
  (i) done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer53)
  Increasing order of solubility is [AFMC 1987]
  A)
  \[CaC{{O}_{3}},KHC{{O}_{3}},NaHC{{O}_{3}}\] done clear
  B)
  \[NaHC{{O}_{3}},KHC{{O}_{3}},CaC{{O}_{3}}\] done clear
  C)
  \[KHC{{O}_{3}},NaHC{{O}_{3}},CaC{{O}_{3}}\] done clear
  D)
  \[CaC{{O}_{3}},NaHC{{O}_{3}},KHC{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer54)
  Nitrolim is [CPMT 1976, 78, 2000; BHU 1987; DCE 1999; RPMT 2000]
  A)
  \[Ca{{(N{{O}_{3}})}_{2}}\] done clear
  B)
  \[Ca{{(CN)}_{2}}\] done clear
  C)
  \[CaC{{N}_{2}}+C\] done clear
  D)
  \[CaC{{N}_{2}}\] done clear
  View Solution play_arrow

• question_answer55)
  The following acids have been arranged in the order of decreasing acid strength. Identify the correct order. (I) \[ClOH\]  (II) \[BrOH\]  (III) \[IOH\] [IIT 1996]
  A)
  \[I>II>III\] done clear
  B)
  \[II>I>III\] done clear
  C)
  \[III>II>I\] done clear
  D)
  \[I>III>II\] done clear
  View Solution play_arrow

• question_answer56)
  Which of the following element does not belong to the family of elements indicated [Orissa JEE 1997]
  A)
  Rubidium (Rb, Z = 37) : Alkali metals done clear
  B)
  Barium (Ba, Z = 56) : Alkaline earth metals done clear
  C)
  Iridium (I, Z = 77) : Nobel gases done clear
  D)
  Argon (Ar, Z = 18) : Nobel gases done clear
  View Solution play_arrow

• question_answer57)
  \[{{H}_{3}}P{{O}_{2}}\] is the formula for one of the phosphorus acid. Its name and basicity are respectively [CBSE PMT 1992; BHU 1999; KCET 1999]
  A)
  Phosphorus acid and two done clear
  B)
  Hypophosphorus acid and two done clear
  C)
  Hypophosphorus acid and one done clear
  D)
  Hypophosphoric acid and two done clear
  View Solution play_arrow

• question_answer58)
  Which of the following oxides of nitrogen is paramagnetic [CPMT 1984; CBSE PMT 1994; AIIMS 2000]
  A)
  \[{{N}_{2}}{{O}_{3}}\] done clear
  B)
  \[{{N}_{2}}O\] done clear
  C)
  \[N{{O}_{2}}\] done clear
  D)
  \[{{N}_{2}}{{O}_{5}}\] done clear
  View Solution play_arrow

• question_answer59)
  Nessler's reagent is [CPMT 2002]
  A)
  Potassium in mercuric iodide done clear
  B)
  \[TiC{{l}_{4}}\] done clear
  C)
  Anhydrous \[AlC{{l}_{3}}\] done clear
  D)
  \[A{{l}_{2}}{{O}_{3}}/C{{r}_{2}}{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer60)
  The noble gas was first time discovered by
  A)
  Cavandish done clear
  B)
  William Ramsay done clear
  C)
  Rayleigh done clear
  D)
  Frankland done clear
  View Solution play_arrow

• question_answer61)
  The ratio of \[\frac{{{C}_{p}}}{{{C}_{v}}}\] for inert gases is [DCE 1999]
  A)
  1.99 done clear
  B)
  2.13 done clear
  C)
  1.66 done clear
  D)
  1.33 done clear
  View Solution play_arrow

• question_answer62)
  White P reacts with caustic soda, the products are \[P{{H}_{3}}\] and \[Na{{H}_{2}}P{{O}_{2}}\]. This reaction is an example of [DCE 2003]
  A)
  Oxidation done clear
  B)
  Reduction done clear
  C)
  Disproportionation done clear
  D)
  Neutralisation done clear
  View Solution play_arrow

• question_answer63)
  The oxide, which cannot act as a reducing agent, is  [Pb. CET 2002]
  A)
  \[N{{O}_{2}}\] done clear
  B)
  \[S{{O}_{2}}\] done clear
  C)
  \[C{{O}_{2}}\] done clear
  D)
  \[Cl{{O}_{2}}\] done clear
  View Solution play_arrow

• question_answer64)
  Which of the following product is formed when \[Si{{F}_{4}}\] reacts with water [Pb. CET 2003]
  A)
  \[Si{{F}_{3}}\] done clear
  B)
  \[{{H}_{4}}Si{{O}_{4}}\] done clear
  C)
  \[{{H}_{2}}S{{O}_{4}}\] done clear
  D)
  \[{{H}_{2}}Si{{F}_{4}}\] done clear
  View Solution play_arrow

• question_answer65)
  Ozone with dry iodine give [Pb. CET 2003]
  A)
  \[{{I}_{4}}{{O}_{4}}\] done clear
  B)
  \[{{I}_{2}}{{O}_{3}}\] done clear
  C)
  \[I{{O}_{2}}\] done clear
  D)
  \[{{I}_{2}}{{O}_{4}}\] done clear
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• question_answer66)
  The microcosmic salt is [Pb.CET 2004; Pb. PMT 2004]
  A)
  \[Na(N{{H}_{4}}){{H}_{2}}O\] done clear
  B)
  \[K(N{{H}_{4}})HP{{O}_{3}}2{{H}_{2}}O\] done clear
  C)
  \[Na(N{{H}_{4}})HP{{O}_{4}}4{{H}_{2}}O)\] done clear
  D)
  \[Na(N{{H}_{3}})HP{{O}_{4}}4{{H}_{2}}O\] done clear
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• question_answer67)
  Thermite is a mixture of [Pb. CET 2004]
  A)
  \[C{{r}_{2}}{{O}_{3}}+A{{l}_{2}}{{O}_{3}}\] done clear
  B)
  \[F{{e}_{2}}{{O}_{3}}+Al\] done clear
  C)
  \[F{{e}_{2}}{{O}_{3}}+A{{l}_{2}}{{O}_{3}}\] done clear
  D)
  \[A{{l}_{2}}{{O}_{3}}+2Cr\] done clear
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• question_answer68)
  The colour of liquid \[{{O}_{2}}\] is [BVP 2004]
  A)
  Red done clear
  B)
  Dark blue done clear
  C)
  Pale yellow done clear
  D)
  Pale blue done clear
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• question_answer69)
  Which of the following gas mixture is used by the divers inside the sea [AFMC 2004]
  A)
  \[{{O}_{2}}+He\] done clear
  B)
  \[{{O}_{2}}+Xe\] done clear
  C)
  \[{{O}_{2}}+Ar\] done clear
  D)
  \[{{O}_{2}}+{{N}_{2}}\] done clear
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• question_answer70)
  One mole of magnesium nitride on the reaction with an excess of water gives [AIEEE 2004]
  A)
  Two moles of ammonia done clear
  B)
  One mole of nitric acid done clear
  C)
  One mole of ammonia done clear
  D)
  Two moles of nitric acid done clear
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• question_answer71)
  Calcium cyanamide on treatment with steam produce [Pb. PMT 2004]
  A)
  \[CaC{{O}_{3}}+N{{H}_{  3}}\] done clear
  B)
  \[CaHC{{O}_{3}}+N{{H}_{3}}\] done clear
  C)
  \[CaO+N{{H}_{3}}\] done clear
  D)
  \[Ca{{(OH)}_{2}}+N{{H}_{3}}\] done clear
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