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15th February 2016, 03:50 PM
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| Re: JEXPO Chemistry Question Paper
In JEXPO exam, question of chemistry paper will be based on Madhyamik Examinations. Here I was founded all questions for JEXPO Chemistry: . Identify the substance which doesn’t continue to burn in an atmosphere of N2 – D) W . A student tests a sample of water an reports its pH as 6 at room temperature. Which one of the following might have been added to make it drinking water? –C) Baking Soda . Which among the following types of water is poor conductor of electricity?- D) Distilled Water . The water obtained in ion-exchange process is – A) devoid of dissolved salts and minerals . --- is used in advertisement glow tubes.- A) Neon . A metal carbonate X when treated with dil. HCL gives Y. Y when used in mines area reduces suspended particulate matter in atmosphere. Identify Y- B) H2CO3 . Metals present in permutit are – B) Na and Al . Which one of the following is the formula of salt?- B) KCl . Which element has twice as many electrons in its second shell as in the 1 st shell?- A) Be . Which gas is formed on heating sodium propanoate with lime?- B) Ethane . Identify the soft metal among the following – D) Potassium . Among the inert gases which gas does not have octet configuration ?- B) Helium . A solid non-metal X forms oxide of type X2O5, then the formula of its corresponding chloride is – B) XCl5 . Which among the following acids is present in lemons?- D) Ascorbic acid . Washing soda is – B) anhydrous sodium carbonate . A mixture of chalk powder and ammonium chloride can be separated by – D) sublimation . Which among the following is a pure substance? – B) Concentrated H2SO4 . Which is a negative radical among the following?- A) Silicate . If a negative ion has 10 neutrons and 9 protons, then the electronic configuration of the atom of the element (from which the ion has been formed) is - C) 2,8 . Identify weak mineral acid among the following - A) Palmitic Acid . Salt used in purification of water is – A) potas alum . The no. of lone pair of electrons on the N atom of ammonia molecule is – A) 1 . Which one gives a red precipitate with ammoniacal solution of copper (I) chloride?- C) ethyne . The name of the compound CH3-CH2COOH is – C) propanoic acid . In the fountain experiment with ammonia the color of the fountain is – C) pink . Which of the following is a saturated hydrocarbon?- C) ethane . In the reaction C2H5OH->CH3COOH, KMnO4 acts as- C) oxidizing agent . Which one of Na, Mg, Fe and Cu has least tendency to form ions?- D) Cu . Which one of the following is least dense?- D) Aluminum . Which one is a convalent compound? – A) HCl . Which metal will react readily with cold water?- D) Calcium . Calcination is employed to concentrate which ore?- B) Oxide . The electrolyte which is partially ionized in its aqueous solution is – A) ethanoic acid . Which of the following is most reactive and stored in kerosene?- D) potassium . Which one will not displace copper from copper sulphate?- D) Ag . Cinnabar is an ore of – A) Hg . An element combines with oxygen to give a compound with a high melting point. The compound is also soluble in water. The element is likely to be – A) Calcium . Sometimes chlorine gas is passed through water for its purification. What will be the pH of such a sample of water? – D) very near to 8 . NaHCO3 represents the formula of which one of the following?- D) Baking Soda . Which one of the following has larger number of molecules? – C) 2 gm H2 . The relative molecular mass of a gass is 44. Therefore its vapour density is – C) 22 . A metal object is to be electroplated with silver. The electrolyte selected is – B) Sodium argentocyanide. . A deep blue color appears when excess of ammonium hydroxide is added to a solution containing the cation – D) Cu2+ . The pair of irons which does not cause hardness of water is – D) nitrate, phosphate . In the reaction N2 + 3 H2 -> 2NH3, the volume ratio of the gases is 1:3:2, was stated by – B) Gay Lussac . Which one will migrate towards anode in an electrolytic cell?- B) Chloride ion . An aqueous solution contains H+, Ag+, Fe2+, Zn2+ ions. The ion that will be reduced first at cathods is- D) Zn2+ . Which of the following pairs of elements are members of the same group of Periodic Table?- D) O and S . The salts of which among the pairs of metals cause greater water pollution?- B) Hg,Cd . In blue vitriol the no. of molecules of water of crystallization are – C) 5 JEXPO chemistry exam question paper    |