Question 11 MarkWhich instrument is used for recording earthquakes?AnswerSelfView full question & answer→
Question 31 MarkWho was the first to hold that the earth is a sphere and it rotates on its axis?AnswerSelfView full question & answer→
Question 41 MarkWhich substance is used in a refrigerator for cooling purposes?AnswerSelfView full question & answer→
Question 61 MarkFor which food constituent's metabolism are amino acids required?AnswerSelfView full question & answer→
Question 91 MarkWhich of the following is known as laughing gas?AnswerSelfView full question & answer→
Question 101 MarkWhich gas released by automobiles is the most harmful?AnswerSelfView full question & answer→
Question 121 MarkWhich of the following was used as a chemical weapon in the First World War?AnswerSelfView full question & answer→
Question 141 MarkWho proposed that the first letter in the name of an element be used as its symbol?AnswerSelfView full question & answer→
Question 161 MarkWhich invention was the first to assist the police in nabbing an absconding criminal?AnswerSelfView full question & answer→
Question 191 MarkWho was the first person to drill out oil from beneath the surface of the earth?AnswerSelfView full question & answer→
Question 201 MarkWho was the first scientist to use a computer language for his computer?AnswerSelfView full question & answer→