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Mdcat-past-papers - UHS - Chemistry Quiz

Filters: Board: UHS | Subject: Chemistry |
201. Graphite and diamond are allotropes of carbon. Diamond is a non-conductor whereas graphite is a good conductor because:



202. The diagram below is a plot of melting points of elements of second period against atomic numbers. Lithium and fluorine are placed at the extreme ends of the plot. Where will you place carbon among the empty slots of melting points?



203. What is the trend of melting and boiling point of the elements of a short period as we move from left to right in the periodic table?



204. The trends in melting points of element of third period are depicted in figure below. The sharp decreases observed from Si to P is due to :



205. Melting points of group II-A elements are higher than those of group-1-A because:



206. The following sketch shows the variation in a physical property of third period elements against their atomic number. What physical property is plotted in this sketch?



207. Down the group, acid-base behavior of metallic oxides of group 2 elements changes to:



208. Electron affinity of the atom is the energy released when:



209. In period 2 and period 3, maximum melting point is shown by elements:



210. Which group of the periodic table contains non-metals, metalloids, and metals?



211. Which of the following sulfate compounds is insoluble in water?



212. Which of the following complexes shows tetrahedral geometry?



213. In which pair does one have all unpaired d orbitals while the other has all paired d orbitals?



214. Which of the following is not Basic in nature?



215. The solubility of sulphates of alkaline metals generally:



216. All alkali metals react with chlorine gas to form white metal chlorides salt. Metal chloride salt formed is:



217. Which of the following is amphoteric in nature:



218. Why fluorine has less electron affinity as compared to bromine?



219. Which of the following transition metal shows 3d⁵ configuration in its +2 oxidation state?



220. Which of the following is NOT an alloy?



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