JEE Main & Advanced Chemistry Hydrogen & Its Compounds / हाइड्रोजन और इसके यौगिक Question Bank

done Critical Thinking Questions Total Questions - 32

• question_answer1)
  Polyphosphates are used as water softening agents because they [IIT JEE (Screening) 2002]
  A)
  Form soluble complexes with anionic species done clear
  B)
  Precipitate anionic species done clear
  C)
  Forms soluble complexes with cationic species done clear
  D)
  Precipitate cationic species done clear
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• question_answer2)
  The critical temperature of water is higher than that of \[{{O}_{2}}\] because \[{{H}_{2}}O\] molecule has [IIT 1997]
  A)
  Fewer electrons than oxygen done clear
  B)
  Two covalent bonds done clear
  C)
  V-shape done clear
  D)
  Dipole moment done clear
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• question_answer3)
  One mole of calcium phosphide on reaction with excess water gives [IIT 1999]
  A)
  One mole of phosphene done clear
  B)
  Two moles of phosphoric acid done clear
  C)
  Two moles of phosphine done clear
  D)
  One mole of phosphorus pentaoxide done clear
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• question_answer4)
  When zeolite, which is hydrated sodium aluminium silicate, is treated with hard water the sodium ions are exchanged with [IIT 1990]
  A)
  \[{{H}^{+}}\]ions done clear
  B)
  \[C{{a}^{2+}}\]ions done clear
  C)
  \[M{{g}^{2+}}\]ions done clear
  D)
  Both \[C{{a}^{2+}}\] and \[M{{g}^{2+}}\] done clear
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• question_answer5)
  Hydrogen peroxide is
  A)
  A stronger acid than water done clear
  B)
  A weaker acid than water done clear
  C)
  An oxidising agent done clear
  D)
  A reducing agent done clear
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• question_answer6)
  Hydrogen can be obtained from water by
  A)
  Reaction with metal oxides done clear
  B)
  Reaction with non-metal oxides done clear
  C)
  Reaction with metals done clear
  D)
  Reaction with metal hydrides done clear
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• question_answer7)
  Which of the following is/are hard water(s)
  A)
  Water containing some potash alum done clear
  B)
  Water containing a few drops of HCl done clear
  C)
  Water containing common salt done clear
  D)
  Water containing calcium nitrate done clear
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• question_answer8)
  Pick the odd one out
  A)
  Sodium borohydride reacts very slowly with cold water done clear
  B)
  Sodium borohydride reacts very violently with cold water to produce \[{{H}_{2}}\] done clear
  C)
  Solubility of sodium borohydride in water at \[25{}^\circ C\] is 10.05 g/mL done clear
  D)
  Melting point of sodium borohydride is \[500{}^\circ C\] done clear
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• question_answer9)
  Hydrogen can be obtained from water, by the action of water on
  A)
  Calcium carbide done clear
  B)
  Calcium hydride done clear
  C)
  Calcium oxide  done clear
  D)
  Calcium done clear
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• question_answer10)
  What is true about ice
  A)
  Its density is more than water done clear
  B)
  It is a good conductor of heat done clear
  C)
  It is a thermal insulator done clear
  D)
  Its density is less than water done clear
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• question_answer11)
  Hydrogen will not reduce [IIT 1985]
  A)
  Heated cupric oxide done clear
  B)
  Heated ferric oxide done clear
  C)
  Heated stannic oxide done clear
  D)
  Heated aluminium oxide done clear
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• question_answer12)
  HCl is added to following oxides. Which one would give \[{{H}_{2}}{{O}_{2}}\] [IIT 1980]
  A)
  \[Mn{{O}_{2}}\] done clear
  B)
  \[Pb{{O}_{2}}\] done clear
  C)
  BaO done clear
  D)
  None of these done clear
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• question_answer13)
  Which of the following pair will not produce dihydrogen gas [IIT 1994]
  A)
  \[Cu+HCl(dil.)\] done clear
  B)
  \[Fe+{{H}_{2}}S{{O}_{4}}\] done clear
  C)
  \[Mg+\text{steam}\] done clear
  D)
  \[Na+\text{alcohol}\] done clear
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• question_answer14)
  The amount of \[{{H}_{2}}{{O}_{2}}\] present in 1 L of 1.5 N\[{{H}_{2}}{{O}_{2}}\] solution is [IIT 1991]
  A)
  2.5 g done clear
  B)
  25.5 g done clear
  C)
  3.0 g done clear
  D)
  8.0 g done clear
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• question_answer15)
  Hydrogen is evolved by the action of cold dil. \[HN{{O}_{3}}\] on [IIT 1998]
  A)
  Fe done clear
  B)
  Mn done clear
  C)
  Cu done clear
  D)
  Al done clear
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• question_answer16)
  Hydrogen can behave as a metal
  A)
  At very high temperature done clear
  B)
  At very low temperature done clear
  C)
  At very high pressure done clear
  D)
  At very low pressure done clear
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• question_answer17)
  \[{{D}_{2}}O\] is preferred to \[{{H}_{2}}O\], as a moderator, in nuclear reactors because
  A)
  \[{{D}_{2}}O\] slows down fast neutrons better done clear
  B)
  \[{{D}_{2}}O\] has high specific heat done clear
  C)
  \[{{D}_{2}}O\] is cheaper done clear
  D)
  None of these done clear
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• question_answer18)
  Out of the two allotropic forms of dihydrogen, the form with lesser molecular energy is
  A)
  Ortho done clear
  B)
  Meta done clear
  C)
  Para done clear
  D)
  All have same energy done clear
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• question_answer19)
  Saline hydrides react explosively with water, such fires can be extinguished by
  A)
  Water done clear
  B)
  Carbon dioxide done clear
  C)
  Sand done clear
  D)
  None of these done clear
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• question_answer20)
  Metals of groups 7, 8 and 9 do not form metallic hydrides. This is termed as
  A)
  Hydride gap done clear
  B)
  Hydride shift done clear
  C)
  Anhydride done clear
  D)
  Dehydride done clear
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• question_answer21)
  When temporary hard water containing \[Mg{{(HC{{O}_{3}})}_{2}}\] is boiled the ppt. formed is of
  A)
  \[MgC{{O}_{3}}\] done clear
  B)
  MgO done clear
  C)
  \[Mg{{(OH)}_{2}}\] done clear
  D)
  None of these done clear
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• question_answer22)
  Permanent hardness due to \[M{{g}^{2+}}\] ions is best removed by
  A)
  \[Ca{{(OH)}_{2}}\] done clear
  B)
  \[N{{a}_{2}}C{{O}_{3}}\] done clear
  C)
  \[N{{a}_{2}}C{{O}_{3}}+Ca{{(OH)}_{2}}\] done clear
  D)
  None of these done clear
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• question_answer23)
  The most abundant element in the universe is
  A)
  Carbon done clear
  B)
  Silicon done clear
  C)
  Hydrogen done clear
  D)
  Helium done clear
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• question_answer24)
  Pick out the correct statement
  A)
  By decreasing the temperature pure para-hydrogen can be obtained done clear
  B)
  By increasing the temperature pure ortho-hydrogen can be obtained done clear
  C)
  By decreasing the temperature pure ortho-hydrogen can be obtained done clear
  D)
  By increasing the temperature pure para-hydrogen can be obtained done clear
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• question_answer25)
  Hydrogen can be produced by heating
  A)
  Cu with \[{{H}_{2}}S{{O}_{4}}\] done clear
  B)
  Sodium formate done clear
  C)
  Sodium oxalate done clear
  D)
  None of these done clear
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• question_answer26)
  Plumbosolvency is a health hazard in the transportation of
  A)
  Hard water only done clear
  B)
  Soft water only done clear
  C)
  Both a and b done clear
  D)
  Water containing plum juice done clear
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• question_answer27)
  A sample of water contains sodium chloride. It is
  A)
  Hard water done clear
  B)
  Soft water done clear
  C)
  Moderately hard done clear
  D)
  None of these done clear
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• question_answer28)
  Hardness producing salt, whose solubility in water decreases with rise of temperature is
  A)
  \[CaC{{l}_{2}}\] done clear
  B)
  \[CaS{{O}_{4}}\] done clear
  C)
  \[Ca{{(HC{{O}_{3}})}_{2}}\] done clear
  D)
  \[MgS{{O}_{4}}\] done clear
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• question_answer29)
  A sample of water containing some dissolved table sugar and common salt is passed through organic ion exchange resins. The resulting water will be
  A)
  Tasteless done clear
  B)
  Sweet done clear
  C)
  Salty done clear
  D)
  None of these done clear
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• question_answer30)
  Water obtained by purification with organic ion exchange resins is
  A)
  Pure water done clear
  B)
  Free from only \[C{{a}^{2+}}\], \[M{{g}^{2+}}\] ions done clear
  C)
  Free from \[HCO_{3}^{-},\ SO_{4}^{2-}\] and \[C{{l}^{-}}\]ions only done clear
  D)
  None of these done clear
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• question_answer31)
  Which of the following can effectively remove all types of hardness of water
  A)
  Soap done clear
  B)
  Washing soda done clear
  C)
  Slaked lime done clear
  D)
  None of these done clear
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• question_answer32)
  A commercial sample of hydrogen peroxide is labelled as 10 volume. Its percentage strength is nearly  [KCET 2005]
  A)
  1% done clear
  B)
  3% done clear
  C)
  10% done clear
  D)
  90% done clear
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