Hydrogen PYQs Set 4 (PDF)

Set 4 of 5 · Questions 91-120 of 140

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Mere Teacher · Previous Year Questions JEE Main Chemistry · Hydrogen · Set 4 (Q91-120)
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91. $The O - H bond length in H_{2} O in gas phase is$ (1) $95.7 pm$ (2) $90.2 pm$ (3) $104.5 pm$ (4) $115.5 pm$ 92. $Identify the reactions in which H_{2} O is oxidised I. Photosynthesis II. Reaction of H_{2} O with fluorine III. Reaction of H_{2} O with hydrogen IV. Reaction of H_{2} O with P_{4} O_{10} The correct answer is$ (1) $I, II$ (2) $I, III$ (3) $II, IV$ (4) $III, IV$ 93. $The method used to remove temporary hardness of water is$ (1) $synthetic resins method$ (2) $Calgon’s method$ (3) $Clark’s method$ (4) $ion‐exchange method. (NEET2019)$ 94. $The number of hydrogen bonded water molecule(s) associated with C u S O_{4} .5 H_{2} O is$ (1) $3$ (2) $1$ (3) $2$ (4) $5 (OdishaNEET2019)$ 95. $Match List I with List II List I A. Cobalt catalyst B. Syngas C. Nickel catalyst D. Brine solution List II I. (H_{2} + C 1_{2}) production II. Water gas production III. Coal gasification IV. Methanol production Choose the correct answer from the options given below :-$ (1) $A-IV, B-I, C-II,D-III$ (2) $A-IV, B-III, C-I, D-II$ (3) $A-II, B-III, C-IV, D-I$ (4) $A-IV, B-III, C-II, D-I$ 96. $Which of the following statement (s) is/are correct(A) NaH is non-volatile hydride(B) MgH_{2} is polymeric hydride(C) NH_{3} is an electron precise hydride(D) H_{2} O is an electron rich hydride$ (1) $A, B & D only$ (2) $A, B & C only$ (3) $B only$ (4) $C & D only$ 97. $In the industrial production of which of the following, molecular hydrogen is obtained as a byproduct?$ (1) $NaOH$ (2) $NaCl$ (3) $Na metal$ (4) $N a_{2} C O_{3}$ 98. $The volume strength of 1.5 N H_{2} O_{2} solutionis$ (1) $8.8$ (2) $8.4$ (3) $4.8$ (4) $5.2 (1997,1996)$ 99. $Given below are two statements: One is labelled as Assertion A and other is labelled as Reason R. Assertion A: The dihedral angles in H_{2} O_{2} in gaseous phase is 90. 2^{0} and in solid phase is 111. 5^{0} . Reason r: The change in dihedral angle in solid and gaseous phase is due to the difference in the intermolecular forces. Choose the most appropriate answer from the options given below for A and R.$ (1) $A is correct but R is not correct.$ (2) $Both A and R are correct but is not the correct explanation of A.$ (3) $Both A and R are correct and R is the correct explanation of A.$ (4) $A is not correct but R is correct.$ 100. $Some statements about heavy water are given below. (i) Heavy water is used as a moderator in nuclear reactors. (ii) Heavy water is more associated than ordinary water. (iii) Heavy water is more effective solvent thanordinary water. Which ofthe above statements are correct?$ (1) $(i) and (ii)$ (2) $(i), (ii) and (iii)$ (3) $(ii) and (iii)$ (4) $(i) and (iii)(Mains2010)$ 101. $The reaction of H_{2} O_{2} with H_{2} S is an example of ______ reaction.$ (1) $addition$ (2) $oxidation$ (3) $reduction$ (4) $acidic$ 102. $The empirical formula of Calgon is$ (1) $Na_{2} PO_{3}$ (2) $NaP_{2} O_{3}$ (3) $NaPO_{3}$ (4) $Na_{3} PO_{3}$ 103. $The chemical name of calgon is$ (1) $Sodium hexametaphosphite$ (2) $Potassium hexametaphosphate$ (3) $Calcium hexametaphosphate$ (4) $Sodium hexametaphosphate$ 104. $Hard water contains ion of$ (1) $zinc$ (2) $magnesium and calcium$ (3) $iron$ (4) $iron and manganese$ 105. $'25 volume' hydrogen peroxide means$ (1) $1 L marketed solution contains 250 g of H_{2} O_{2}$ (2) $1 L marketed solution contains 75 g of H_{2} O_{2} .$ (3) $100 mL marketed solution contains 25 g of H_{2} O_{2} .$ (4) $1 L marketed solution contains 25 g of H_{2} O_{2} .$ 106. $H_{2} O_{2} is$ (1) $an oxidising agent$ (2) $a reducing agent$ (3) $both oxidising and reducing agent$ (4) $neither oxidising nor reducing agent.$ 107. $H_{2} O_{2} cannot oxidise$ (1) $Na_{2} SO_{3}$ (2) $KI$ (3) $PbS$ (4) $O_{3}$ 108. $Water softening by Clark's process uses$ (1) $NaHCO_{3}$ (2) $Ca (OH)_{2}$ (3) $Ca (HCO_{3})_{2}$ (4) $Na_{2} CO_{3}$ 109. $Permanent hardness cannot be removed by$ (1) $using washing soda$ (2) $Calgon's method$ (3) $Clark's method$ (4) $ion exchange method.$ 110. $The ionization ofhydrogen atom would give rise to$ (1) $hydride ion$ (2) $hydronium ion$ (3) $proton$ (4) $hydroxyl ion. (1990) Preparation of Dihydrogen, H_{2}$ 111. $The highest industrial consumption of molecular hydrogen is to produce compounds of element:$ (1) $Carbon$ (2) $Nitrogen$ (3) $Oxygen$ (4) $Chlorine$ 112. $Hydrogen peroxide reacts with iodine in basic medium to give :$ (1) $I O_{4}^{-}$ (2) $I O^{-}$ (3) $I^{-}$ (4) $I O_{3}^{-}$ 113. $The volume strength of 1 M H_{2} O_{2} is: (Molar mass of (H_{2} O_{2} = 34 g mol^{- 1})$ (1) $5.6$ (2) $16.8$ (3) $11.35$ (4) $22.4$ 114. $Which one of the following properties has same value for H_{2} and D_{2} ?$ (1) $Density$ (2) $Enthalpy of bond dissociation$ (3) $Bond length$ (4) $Melting point$ 115. $The O - O - H bond angle in H_{2} O_{2} is$ (1) $10 6^{o}$ (2) $10 9^{o} 28 ’$ (3) $12 0^{o}$ (4) $9 7^{o} (1994)$ 116. $Match the following: List-I (Type of hydride) (A) Electron precise (B) Saline (C) Electron deficient (D) Electron rich List-II (Example) (i) SiH_{4} (ii) H_{2} O (iii) MgH_{2} (iv) B_{2} H_{6} A B C D$ (1) $(ii), (iii), (i), (iv)$ (2) $(i), (iii), (iv),(ii)$ (3) $(iv), (ii), (iii), (i)$ (4) $(ii), (i), (iv), (iii)$ 117. $Which of the following reaction is not an example of hydrolysis reaction?$ (1) $P_{4} O_{10} + 6 H_{2} O \to 4 H_{3} PO_{4}$ (2) $Mg_{3} N_{2} + 3 H_{2} O \to 3 Mg (OH)_{2} + 2 NH_{3}$ (3) $SiCl_{4} + 2 H_{2} O \to SiO_{2} + 4 HCl$ (4) $2 F_{2} + 2 H_{2} O \to 4 HF + O_{2}$ 118. $The starting material for convenient preparation of dcuterated hydrogen peroxide (D_{2} O_{2}) in laboratory is:$ (1) $K_{2} S_{2} O_{8}$ (2) $2-ethylanthraquinol$ (3) $B a O_{2}$ (4) $BaO$ 119. $Which ofthe following is electron‐deficient?$ (1) $(_{3}^{B H})_{2}$ (2) $P H_{3}$ (3) $(_{3}^{C H})_{2}$ (4) $(NEET 2013)$ 120. $Which ofthe following metal evolves hydrogen on reacting with cold dilute H N O_{3} ?$ (1) $Mg$ (2) $Al$ (3) $Fe$ (4) $Cu (1989) Properties of Dihydrogen$