Chemistry Which of the following is not a noble gas ? Neon Hydrogen Helium Argon Neon Hydrogen Helium Argon ANSWER DOWNLOAD EXAMIANS APP
Chemistry The gas that usually causes explosions in coal mines is Air Hydrogen Methane Carbon monoxide Air Hydrogen Methane Carbon monoxide ANSWER DOWNLOAD EXAMIANS APP
Chemistry The hardest form of carbon is diamond coke charcoal graphite diamond coke charcoal graphite ANSWER DOWNLOAD EXAMIANS APP
Chemistry Total number of naturally occurring elements 62 98 92 110 62 98 92 110 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which among the following coal contains 90 per cent of carbon? Bitumen Anthracite Peat Lignite Bitumen Anthracite Peat Lignite ANSWER DOWNLOAD EXAMIANS APP
Chemistry The two metal ions that cause hardness to water are: Sodium, Calcium Calcium, Magnesium Sodium, Potassium Sodium, Magnesium Sodium, Calcium Calcium, Magnesium Sodium, Potassium Sodium, Magnesium ANSWER DOWNLOAD EXAMIANS APP
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