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You Are On Multi Choice Question Bank SET 2161

108051. What is extracted from Bauxite ?





108052. Why is phosphorus kept under water ?





108053. What is the chemical name of table salt ?





108054. Which of the following elements behave chemically both as a metal and a non metal?





108055. Which of the following gases is the most toxic?





108056. The substance that contains the maximum amount of nitrogen is ?





108057. The cyclotron is used to





108058. The ejection of electrons when a metal surface is irradiated is known as





108059. Sugars are converted in the liver into





108060. The acid generally stored in batteries is





108061. What is laughing gas ?





108062. Permanent hardness of water is due to the presence of ?





108063. Petroleum is found in ?





108064. Ozone is :





108065. Elements that show the properties of both metals and non metals are called ?





108066. Find the sum of all terms of the progression 120,125,130,---220





108067. Atomic number of an element gives





108068. What is hottest part of the gas flame is called ?





108069. What is the hardest form of carbon ?





108070. All noble gases are ?




108071. Alloys made with mercury as one metal are called ?





108072. Which element found in all organic compounds ?





108073. The main chemical constituent of clay is ?





108074. The high reactivity of fluorine is due to ?





108075. A catalyst is a substance which





108076. Chemical used in photography is





108077. Air is a





108078. The gas used for artificial ripening of green fruit is ?





108079. Which one is an organic Acid ?





108080. The Chemical Symbol of Sodium is





108081. The most electropositive elements among the following is :





108082. Which gas is used to manufacture vanaspati from vegetable oil is





108083. Due to rusting the weight of iron





108084. Conduction band electrons have more mobility than holes because they are





108085. Mass number of a nucleus is :





108086. The average age of 24 students and their class teacher I sWhen the class teacher is removed the average becomes Then what is the age of the class teacher:





108087. Iodine can be separated from a mixture of Iodine and Potassium Chloride by ?





108088. A train of length 140 m travels with a speed of 72 km/hr.The time taken by the train to pass a telephone post is:





108089. The luster of a metal is due to :





108090. There are 50 students in a class.If 20 students passed in maths,25 students passed in English and 15 students passed in both English and Maths.How many students passed neither in Maths nor In English?





108091. The most abundant rare gas in the atmosphere is ?





108092. The metal that is used as a catalyst in the hydrogenation of oils is ?





108093. The nuclear particles which are assumed to hold the nucleons together are ?





108094. Biogas majorly contains ?





108095. Which of the following causes variation in the genetic material of progeny? 1.Sexual Reproduction 2.Asexual Reproduction 3.Mutations 4.Epigenetic changes Select the correct answer using the codes below





108096. Who among the following is the father of genetic engineering?





108097. Genetic Screening is





108098. Four resistors of 10000 ohm, 1000 ohm, 100 ohm and 10 ohm are connected in parallel. What will be their equivalent resistance





108099. Why does the sky appear blue in colour





108100. The function of AC dynamo is





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