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Q. The Helium atoms that have lost two electrons are called ________?

Q. Who among the following scientists had discovered Radium?

Q. The process of purifying water by spraying water on to a bed of stones where microorganism live so that the microorganisms feed on the pathogens in water and make the water free from harmful pathogens is called?

Q. The pneumatophores are negatively geotropic roots which grow upward & meant for gaseous exchange. These are a characteristic of _______?

Q. Which among the following is the correct location of pyloric sphincter in human body?

Q. Which among the following is known as White Vitriol?

Q. A vehicle moving on a circular path experiences ________?

Q. Which among the following is an ionic solid?

Q. Who among the following coined the term ―cosmic rays‖ ?

Q. When a piece of quicklime is dipped in water, it gives bubbles. This bubbling is due to which of the following?