MDCAT Chemistry The Halogens and Noble Gases Online Test

1. Aluminum (III) chloride forms a dimer because

2. Chlorine acts as a bleaching agent only in the presence of

3. Which halogen has application in medicines mostly?

4. All the elements of oxygen family are

5. Variable valency is characteristic of

6. Bond angle is minimum for

7. Fluorine differs from other halogens due to its small size and restriction of its valence shell to an octet. Mark the correct behavior of fluorine

8. The atoms with high values of first ionization potential values always have

9. Bleaching powder reacts with a few drops of conc. HCl to give

10. Boron compounds behave as Lewis acid because of their

11. Alkali metals are generally extracted by

12. Two elements whose electro negativities are 1.2 and 3.0, the bond formed between them would be

13. Hypo is used in photography for

14. Which of the following is most electronegative?

15. Mark the element which shows greatness inert pair effect

16. Which of the halogen has highest electronegativity?

17. Which one boric acid is stable one?

18. Select the weakest acid among the following

19. The halogens exist as halides. Which is not common place whose they are found?

20. XeF₄ on partial hydrolysis produces

21. The strongest reducing agent out of Na, K, Rb And Cs is

22. Point out the correct equation which represents the strong action of heat on calcium nitrate.

23. The density of nitrogen gas prepared from air is slightly greater than that of nitrogen prepared by a chemical reaction form a compound of nitrogen due to the presence of the following in aerial nitrogen.

24. Alkali metals displace hydrogen from water forming bases due to the reason that

25. Which of the following metal is present in chlorophyll?

26. The properties of lithium are similar to those of Mg this is because

27. Electropositive character increase down the group due to

28. Compared with the alkaline earth metals, the alkali metals exhibit

29. The percentage of lead in lead pencil is

30. If one liter of air is passed repeatedly over heated copper and magnesium till no further reduction in volume takes place, the volume finally obtained would be approximately

31. An atom with atomic number 20 is most likely to combine chemically with the atom whose atomic number is

32. Phosphide ion has the electronic structure similar to that of

33. Alkaline earth metals comes under

34. Electron affinity of sulphur is

35. Helium-oxygen mixture is used by deep sea divers in preference to nitrogen-oxygen mixture because

36. The noble gases are

37. Presence of which of the following salt increases the rate of setting of plaster of Paris.

38. Which one has least dissociation energy?

39. Mark the incorrect statement about the conductance semi-conductors in photoelectric cells and solar batteries. Semi conductors show

40. Bromine can be liberated from KBr solution by the action of

41. Carbonates of li are less stable than that of Na due to

42. The correct order of electron affinity among the following is

43. Match List I with List II and select the answer using the codes given below:

Code	List I	Code	List II
a	XeF₄	1	Distorted octahedral
b	XeF₆	2	Tetrahedral
c	XeO₃	3	Square planar
d	XeO₄	4	Trigonal pyramidal

44. Number of elements present in 5th period is

45. The element with highest electron affinity among the halogen is

46. Common oxidation state of boron are

47. Keeping in view the uses of Al, mark the incorrect statement. Al is used

48. What is more true about alkali metals?

49. Which noble gas is used in labors?

50. Which statement is true about IV A group

51. Which is the strongest acid?

52. 6NaOH + Cl₂ → 5Nacl + Naclo₃ in this reaction chlorine is

53. To a clear solution of compound (X) a solution of BaCl₂ is added and a heavy white precipitate is formed which does not dissolve in dilute HCl. The compound X is

54. Orthophosphoric acid is

55. When NaOH is made, the gas released at the cathode is

56. Which of the following is most volatile?

57. Which element forms an ion with charge +3?

58. Which of the following is true for magnesium?

59. Which of the following is a man made element?

60. Which of the following has the least ionization potential?

61. In the electrolytic extraction of aluminum fused cryolite is added

62. Which one of the following elements belongs to halogen family?

63. Freon-12 is used as a

64. Fluorine differs from other halogens due to

65. What is the order of power of halogen as an oxidizing agent?

66. Calcium is obtained by

67. Which is the symbol of element whose atoms have the outermost configuration 2S²2P³ is

68. Which one of the following is a correct set for SiO₂?

69. The acid which has a peroxy linkage is

70. The halogen having highest electron affinity is

71. The alkali metals

72. Which one halogen can show only-1 oxidation state?

73. Gradual addition of electronic shells in the noble gases causes a decrease in their

74. Mark the compound which does not exist

75. Which is the most volatile compound?

76. Choose a set which has both member from the same periods of periodic table

77. When one mole of bleaching powder is completely decomposed, then the mass of chlorine gas that is liberated will be

78. NaOH is prepared by the method

79. Which halogen is most electropositive?

80. Crystalline form of sulphur stale at room temperature is

81. The oxyacids of phosphorus in which phosphorus has the lowest oxidization state is

82. The important ore of lead is

83. Mg is an important component of which biomolecule occurring extensively in living world?

84. Reactivity of borazole is greter than that of benzene because

85. The oxide of which of the following elements will be acidic in character

86. A 500 g toothpaste sample has 0.2 g fluoride concentration. What is the concentration of F¯ ions in terms of ppm level?

87. Which element has strongest attraction for its valence electrons?

88. Sodium sulphates is solute in water but barium sulphates is insoluble because

89. A clathrate may be defined as a

90. Permonosulphuric acid is known as

91. Sea divers go deep in the sea water with a mixture of which of the following gases?

92. B, Al, Ga, In and Tl belong IV group of the period table show a decrease with increasing relative atomic mass:

93. For two ionic solids CaO and Kl, identify the wrong statement among the following?

94. In the modern long form of the periodic table, elements are arranged in the increasing order of

95. Which one of the following properties of alkali metals increases in magnitude as the atomic number rises?

96. In the manufacture of bromine form sea water, the mother liquor containing bromides is treated with

97. Which of the following does not exhibit the periodicity in properties of the elements?

98. Epsom salt is the hydrate of one of the following

99. Which statement is correct about halogens?

100. Which member of the halogen family (X₂) does not show positive oxidation sate (X⁺₂)?

101. Which of the following isoelectronic ions has the lowest ionization energy?

102. Hydrogen fluorine is a lipid unlike other hydrogen halides because

103. Which one of the following has highest electropositive character?

104. Solution of sodium metal in liquid ammonia in strongly reducing due to the presence in the solution of the following

105. Heavy water is obtained by

106. Which is the strongest acid

107. Which one among the following form maximum number of compounds?

108. Fluorine does not show positive oxidation states due to the absence of

109. A Major constituent of Portland cement (except lime) is

110. Which of the following will liberate hydrogen by its reaction with hydrochloric acid?

111. Which reason best accounts for the use of helium in modern airships?

112. How does the ionization energy of 1st group elements vary?

113. Which of the following compounds is explosive in nature?

114. LiF is insoluble in water, while NaF and KF are soluble. This is due to

115. Which one of these is most reactive?

116. Which noble gas is used earth quake prediction?

117. Several blocks of magnesium are fixed to the bottom of a ship to

118. The electronic configuration of metal M is 1s², 2s², 2p⁶, 3s¹. The formula of its oxide would be

119. In which of the following groups, when he is placed, its all properties are satisfied?

120. The most abundant inert gas in the atmosphere is

121. Which one of the halogen acid is a liquid?

122. Elements of which of the following groups will from anions most readily?

123. The element that does not form a monoxide is

124. Which of the following substance is used for drying gases?

125. Which of the following noble gases does not have an octet of electrons in its outermost shell?

126. Fluorine is a better oxidizing agent than Br₂. It is due to

127. I₂ is solid at room temperature because

128. HNO₂ acts as an/a

129. Which of the following oxides is peroxide?

130. Electrolysis of fused anhydrous KCl.MgCl₂.6H₂O gives

131. In curing cement plasters, water is sprinkled from time to time. This helps is

132. Polyanion formation is maximum in

133. When ammonia is heated with cupric oxide, a molecule of ammonia will

134. Nitrolim is

135. Calico printing means

136. Mark the element which shows only one oxidation state is its compounds

137. Which one has highest electron affinity?

138. The structure of XeF₆

139. The first ionization energies of alkaline earth metals are higher than those of the alkali metals. This is because

140. Select the gas which is used in electrical discharge lights

141. Which one of the following reactions is not associated with the Solvay process of manufacture of sodium carbonate?

142. An atom with high electro negativity has

143. The process associated with sodium carbonate manufacture is known as

144. Which one halogen is radioactive?

145. Cassiterite is an ore of

146. What is the atomic number (Z) of the noble gas that reacts with fluorine?

147. Which of the following compounds of cement sets at the slowest rate?

148. The shape of gaseous SnCl₂ is

149. Beryllium is placed above magnesium in the second group. Beryllium dust, therefore, when added to MgCl₂ solution will

150. Hydrochloric acid at 25°C is

151. One which is not dissolved by dilute hydrochloric acid is

152. When a colourless gas is passed through bromine water only decolourisation takes place the gas is

153. Sodium chloride when heated with conc. H₂SO₄ and solid potassium dichromate gives

154. O²¯ has high ionic radius because the ionic radius of anion is greater than individual element. Which of the following oxides is amophteric in character?

155. In the periodic table, the element with atomic number 16 will be placed in the group

156. The halogen which has only one oxidation state is

157. Because of its small size and due to restriction of its valence shell to an octet fluorine differs from other halogens, which behavior of fluorine is incorrect?

158. Which of the following species has maximum number of unpaired electrons?

159. The noble gas He was discovered by

160. Identify the correct statement

161. Lithium is strongest reducing agent among alkali metals due to which of the following factor?

162. The colour of I₂ in CCI₄ is

163. Which of the following halogen does not exhibit positive oxidation state in its compounds?

164. Aluminum is most abundant in earth’s crust, yet it is obtained from bauxite because

165. Mark the correct statement

166. In view of their low ionization energies, the alkali metals are

167. Molten sodium chloride conducts electricity due to the presence of

168. The number of elements in the 4th period of periodic table is

169. Which is valence shell configuration of halogens?

170. Which of the following noble gas is not present in atmosphere?

171. Among noble gases xenon gives compounds due to

172. The atomic radius increases as we move down a group because

173. Among the alkaline earth metals the element forming predominantly covalent compound is

174. Which of the following statements is incorrect about halogens?

175. In Solvay ammonia process, sodium bicarbonate is precipitated due to

176. The metal used for making radiation shield is

177. Alkaline earth metals show standard electrode potential values which are very similar to their alkali metals due to

178. The most acidic of the following compounds is

179. Which is the gas among the following that reacts with H₂ is darkness?

180. Which of the following belongs to the halogen family?

181. Which gives green colour in fireworks?

182. Which one is the biggest ion?

183. Point out the property which is not characteristic of alkali metals

184. Limestone is not used in which of the following manufacturing processes?

185. Which one is the weakest oxyacid of chlorine?

186. Bleaching powder loses its power on keeping for a long time because

187. All the following decompose easily on heating to give oxygen except

188. On heating sodium metal in a current of dry ammonia, the compound formed is

189. The most stable +2 oxidation state is exhibited by

190. The elements with atomic numbers 9, 17, 35, 53, 85 and all

191. The halogen that is most easily reduced is

192. Choose the non metallic element whose molecules contain maximum number of its atoms

193. Which of the following phosphorus is most reactive?

194. The atomic numbers of four elements are given below. Which one is an alkaline earth metal?

195. Which of the following is an electron management of a noble gas?

196. Identify the correct statement

197. Action of caustic soda on aluminum hydroxide gives a compound having formula

198. When sulphur is boiled with Na₂SO₃ solution, the compound formed is

199. White enamel of our teeth is

200. Halogens exist in the form of

201. Cl₂O₇ is best prepared by passing by

202. Which of the following has greatest reducing power?

203. Which shows maximum catenation property?

204. Which gas can support combustion?

205. The halogen which reacts spontaneously with Au(s) to produce Au³⁺ is:

206. Which statement is correct?

207. The bleaching action of chlorine is due to

208. Which molecule has a coordinate covalent bond in its structure?

209. Mark the nitrate which decomposes differently on heating

210. Which of the following halogens dose not form oxy acid?

211. The most powerful oxidizing agent among the halogens is

212. The metal extracted by electrolysis of its fused salt is

213. Which of the following fluorides of xenon is impossible?

214. The element which has a simple cubic lattice in solid state is

215. In the fractional distillation of liquid air, the gas that boils off last is

216. The last member of the family of inert gases is

217. Which halogen have most corrosive action on skin?

218. Which of the following is most electronegative?

219. All halogen are

220. Which of the following has highest dipole moment?

221. Keeping in view the uses of sodium silicate, select the incorrect statement:

222. Which of the following hydrogen halide is the weakest acid in solution?

223. Neon glows in discharge tube as

224. Choose the correct statement about heat of vapourization of noble gases

225. Which is not correct reason about the oxidizing power of halogens depending on various factors?

226. Sulphuric acid reacts with PCl₅ to give

227. According to the Periodic Law of elements, the variation in properties of elements is related to their

228. Which of the following ion has the highest value of ionic radius?

229. Which noble gas is used in infilament bulbs to stop the filament burning out too quickly?

230. Which one of them is monoatomic?

231. In certain respects, lithium differs from other alkali metals. The main reason for this is

232. The variety of glass used in making lenses and prisms of

233. Sulphuric acid has great affinity for water because

234. Which of the following element has the maximum electron affinity?

235. Which of the noble gas has highest polarizabilities?

236. Among HCL, HBr and Hl, Hi shows highest B.P due to

237. Among the fluorides listed below the one which does not exist?

238. Which one of the following reacts with hemoglobin to form carboxuhaemoglobin?

239. Oxygen shows oxidation states

240. Which of the following has highest first ionization potential?

241. SO3 is not dissolve directly in H2O because

242. XeF₄ involves which hybridization

243. As a fixing agent in photography, sodium thiosulphate is used for

244. The lowest boiling point of helium is due to its

245. Which among the following species has the highest ionization energy?

246. The ionization potential is lowest for the

247. Sea weeds are important source of

248. A solution of sodium metal in liquid ammonia is strongly reducing due to the presence of

249. The difference of water molecules in gypsum and plaster of Paris is

250. When K₂O is added to water, the solution is basic because it contains a significant concentration of

251. Which one of the following properties is not correct for ozone?

252. Which one of the following substances is used in the laboratory for a fast drying of neutral gases?

253. Which of the following is not isoelectronic?

254. Which of the following is correct?

255. Among the halogens the rare element is

256. In the Hoop’s process for refining of Al the fused materials form three different layers and they remain separated during electrolysis also. This is because

257. The last orbit of argon would have electrons

258. Which of the following sets of atomic numbers belong to that of the alkali metals?

259. Mark the incorrect statement about ‘Li’

260. Which of the following is an inert gas?

261. The metal that dissolves in liquid ammonia, giving a dark blue coloured solution is

262. In which form boron exist mostly in nature

263. Sometimes a yellow turbidity appears while passing H₂S gas even in the absence of II group radicals. This is because

264. Which is true for an element R present in group 13 of the periodic table?

265. Aqueous NaCl solution is electrolyzed using platinum electrodes. What is the product formed at cathode?

266. The metal with highest electrical resistance at room temperature is

267. The noble gases consist of

268. The oxidizing power of halogens depends upon various factors. Which are not the correct reasons?

269. P₂O₅ is heated with water to give

270. Which one of the following allotropic forms of carbon is isomorphous with crystalline silicon?

271. Gradual addition of electronic shells in the noble gases causes a decrease in their

272. Fluorides of Ca, Mg, Ba and Sr are