DCE (Delhi College of Engineering) Entrance Examination Sample Paper - Chemistry
PAPER : DCE (Delhi College of Engineering) Entrance Examination Sample Paper (Chemistry)
The question paper contains 180 questions. Four choices are given for a question out of which one choice may be correct. Each question carries 4 marks. The total marks of the Entrance Test are 720 (240 for each subject, i.e., Physics, Chemistry, Maths). You will get 4 marks for each correct response. For each incorrect response, one mark will be deducted from the total score. As such for each incorrect response, you will lose 5 marks (4 for wrong response and one mark as penalty).
62. Which is the most abundant metal in the earth's crust? | |||
A. Fe | B. Al | C. Ca | D. Na |
63. Which one does not give a precipitate with excess of NaOH? | |||
A. ZnSO4 | B. FeSO4 | C. AgNO3 | D. HgCl2 |
64. What volume of CO2 will be liberated at NTP of 12 gm of carbon is burnt in excess of oxygen? | |||
A. 11.2 litres | B. 22.4 litres | C. 2.24 litres | D. 1.12 litres |
65. Which base is found only in nucleotides of RNA? | |||
A. Adenine | B. Uracil | C. Guanine | D. Cytosine |
66. Ascorbic acid is the chemical name of | |||
A. Vitamin B6 | B. Vitamin A | C. Vitamin C | D. Vitamin D |
67. A hydrocarbon has carbon and hydrogen. Its molecular weight is 28. Its possible formula would be | |||||
A. C3H6 | B. C2H4 | C. CH4 | D. C4H8 | ||
68. The first Noble Prize in chemistry was given to | |||
A. Faraday | B. Cnrizzaro | C. Mendeleevs | D. Moseley |
69. Four different colloids have the following gold number. Which one has its most effective action? | |||
A. 10 | B. 30 | C. 20 | D. 40 |
70. Which is an example of thermosetting polymer? | |||
A. Polythene | B. PVC | C. Neoprene | D. Bakelite |
71. The number of unpaired electrons in ferrous ion is | |||
A. 3 | B. 2 | C. 4 | D. 5 |
72. Strongest reducing agent is | |||
A. K | B. Mg | C. Al | D. Ba |
73. Which of the following is man-made element? | |||
A. Ra | B. U | C. Np | D. C – 4 |
74. Which of the following statements is/are correct? | ||
A. Boiling point of alkylhalide is greater than its corresponding alkane | ||
B. In water, solubility of CH3OH > C2H5OH > C6H5OH | ||
C. Aniline is a weaker base than NH3 | ||
D. All of the above | ||
75. Which amine of the following will not answer Carbylamine reaction? | |||
A. Ethylamine | B. Methylamine | C. Dimethylamine | D. Phenylamine |
76. Tollen's reagent can be used to detect | |||
A. (CH3)2 – CHOH | B. CH3 – CO.CH3 | C. CH3CH2CHO | D. CH3OCH3 |
77. Glycerol on heating with Potassium bisulphate yields | |||
A. Acetone | B. Glyceraldehyde | C. Acrolein | D. Propanol |
78. Salicylic acid on heating with sodalime gives | |||
A. Benzene | B. Calcium salicylate | C. Benzoic acid | D. Phenol |
79. Which one of the following will not give iodoform test? | |||
A. Ethanol | B. Ethanal | C. 2-propanone | D. None of these |
80. The rusting of iron is catalysed by | |||||
A. Fe | B. O2 | C. Zn | D. H+ | ||
81. 100 ml of a liquid A was mixed with 25 ml of a liquid B to give non-ideal solution of A-B mixture. The volume of this mixture will be | |
A. 75 ml | B. 125 ml exact |
C. fluctuating between 75 ml and 125 ml | D. close to 125 ml but not to exceed 125 ml |
82. IUPAC name of a compound having the formula (CH3)3 C - CH = CH2 is | |
A. 3, 3 - dimethyl - l - butene | B. 1, 1 - dimethyl - 3 - butene |
C. 1,1, 1 - dimethyl - 2 - propene | D. 3, 3, 3 - dimethyl - 1 - l propene |
83. Which of the following compounds will be optically active? | |||
A. (OH3)2 – CHOH | B. CH3 - CH2 - CH2 - CH3 | C. CH3 – CHCl.COOH | D. (CH3)3.C.Cl |
84. The major components of brass are | |||
A. Zn and Sn | B. Cu and Zn | C. Fe and Ni | D. Zn and Fe |
85. Lunar castic is | |||
A. Silver Chloride | B. Silver Nitrate | C. Sodium Hydroxide | D. Potassium Nitrate |
86. When hot iron is exposed in hot water vapour, the compound formed is | |||||
A. FeO | B. Fe2O4 | C. Fe3O4 | D. Fe2 (OH)2 | ||
87. Which of the following halide is not oxidised by MnO2? | |||
A. F | B. Cl - | C. Br - | D. I - |
88. The outermost electronic configuration of the most electronegative element is | |||
A. ns2np3 | B. ns2np4 | C. ns2np5 | D. ns2np6 |
89. Shape of CO2 is | |||
A. tetrahedral | B. trigonal | C. bent | D. linear |
90. The catalyst used in the manufacture of H2SO4 by contact process is | |||
A. Al2O3 | B. Cr2O3 | C. V2O5 | D. MnO2 |
91. The composition of the common glass is | |||
A. Na2O.CaO.6SiO2 | B. Na2O.Al2O3.2SiO2 | C. CaO.Al2O3.2SiO2 | D. Na2O.CaO.Al2O3.6SiO2 |
92. In a borax lead test, the brown colour is due to | |||
A. Chromium | B.Cobalt | C. Manganese | D. Iron |
93. Which of the following is not a fertiliser? | |||||
A. Urea | B. Superphosphate of lime | C. Benzene Hexachloride | D. Potassium | ||
94. Which one of the following belongs to representative group of elements in the Periodic Table? | |||
A. Lanthanum | B. Argon | C. Chromium | D. Aluminium |
95. Which one of the following is not an isotope of Hydrogen? | |||
A. Tritium | B. Deuterium | C. Ortho-hydrogen | D. None of the above |
96. In the reaction I2 + 2S2O32 - = 2I - + S4O62 -, equivalent weight of iodine will be equal to | |
A. its molecular weight | B. 1/2 of its molecular weight |
C. 1/4 the molecular weight | D. twice the molecular weight |
97. Which of the following is the most powerful oxidising agent? | |
A. F2 | B. Cl2 |
C. Br2 | D. I2 |
98. From the following values of dissociating constants of four acids, which value represents the strongest acid? | |||
A. 2 x 10 -2 | B. 0.02 x 10 -1 | C. 3 x 10 -3 | D. 2.0 x 104 |
99. In which of the following cases, does the reaction go the farthest for completion? | |||||
A. K = 103 | B. K = 10 -2 | C. K = 10 | D. K = 1 | ||
100. The reaction which proceeds in the forward direction is | |
A. Fe2O3 + 6HCl ® 2FeCl3 + 3H2O | B. NH3 + H2O + NaCl ® NH4Cl + NaOH |
C. SnCl4 + Hg2Cl2 ® SnCl2+ 2HgCl2 | D. 2CuI + I2 + 4K+ ® 2Cu2+ + 4KI |
101. The substance capable of being drawn into fine wire is called | |||
A. malleable | B. tensile | C. ductile | D. mild |
102. The idea that most of the mass of an atom is concentrated in a very small core, i.e., nucleus is given by | |||
A. Amedo Avogadro | B. Rutherford | C. Bohr | D. Henery Mosley |
103. Which of the following does contain a co-ordinate covalent bond? | |||
A. N2H5+ | B. BaCl2 | C. HCl | D. H2O |
104. Which of the following contains both covalent and ionic bonds? | |||
A. CCl4 | B. CaCl2 | C. NH4Cl | D. H2O |
105. Keeping in view the periodic law and the periodic table, suggest which of the following elements should have the maximum electronegative character? | |||||
A. Oxygen | B. Nitrogen | C. Fluorine | D. Astatine | ||
106. The electronic configuration of element atomic number 37 is | |
A. (2, 8) 3s23p63d104s24p65s1 | B. (2, 8) 3s23p63d104s25s64p5 |
C. (2, 8) 3s23p64s23d95s14p5 | D. none of these |
107. The pH of 0.1 M solution of a weak acid is 3. What is the value of ionisation constant for the acid? | |||
A. 0.1 | B. 10 -3 | C. 10 -5 | D. 10 -7 |
108. Pure Aniline is a | |||
A. brown coloured liquid | B. colourless liquid | C. brown coloured solid | D. colourless solid |
109. Sulphide ores are generally concentrated by | |||
A. roasting | B. froth floatation | C. reducing by carbon | D. tempering |
110. One mole of CO2 contains | |
A. 6.02 x 1023 atoms of C | B. 6.02 x 1023 atoms of O |
C. 18.1 x 1023 molecules of CO2 | D. 3 gm atom of CO2 |
111. The Avogadro Number or a mole represents | |||||
A. 6.02 x 1023 ions | B. 6.02 x 1023 atoms | C. 6.02 x 1023 molecules | D. 6.02 x 1023 entities | ||
112. What is the weight of one molecule of a monoatomic element X whose atomic weight is 36? | |||
A. 6.0 x 10 -23 gm | B. 6.02 x 1023 gm | C. 36 x 1023 gm | D. 36 x 10 -23 gm |
113. When a -particles are set through a thin metal foil, most of them go straight through the foil because | |
A. a -particles are much heavier than electrons | B. a -particles are positively charged |
C. a -particles move with high velocity | D. a -particles move with low velocity |
114. The reaction, which proceeds in the forward direction, is | |
A. Fe2O3 + 6HCl ® 2FeCl3 + 3H2O | B. NH3 + H2O + NaCl ® NH4Cl + NaOH |
C. SnCl4 + Hg2Cl2 ® SnCl2 + 2HgCl2 | D. 2CuI + I2+ 4K ® 2Cu+ + 4KI |
115. The first order constant for the decomposition of N2O5 is 6.2 x 10 -4 sec –1. The half-life period for this decomposition in second is | |||
A. 1117.7 | B. 111.7 | C. 223.4 | D. 160.9 |
116. When the same amount of zinc is treated separately with excess of H2SO4 and excess of NaOH, the ratio of volumes of H2 evolved is | |||
A. 1 : 1 | B. 1 : 2 | C. 2 : 1 | D. 9 : 4 |
117. Calcium does not combine directly with | |||||
A. oxygen | B. nitrogen | C. hydrogen | D. carbon | ||
118. Carbon differs from other elements of its sub-group due to | |
A. availability of d-orbitals for bonding | B. its limitation to a co-ordination number four |
C. its tendency to catenate | D. its unique ability to form multiple bonds |
119. Iodine reacts with cold dil. NaOH to give | |||
A. NaI + H2O + O2 | B. NaI + NaIO + O2 | C. NaI + NaIO + H2O | D. NaI + NaIO3 + H2O |
120. The number of isomers for the atomic compound of the formula C7H8O is | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
A. 2 B. 3 C. 4 D. 5
CHEMISTRY
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