Question 11 MarkIn galvanization, iron metal is coated with a thin layerAnswerzincView full question & answer→
Question 21 MarkRusting takes place in the presence ofAnswer oxygen and water vapourView full question & answer→
Question 31 MarkThe fuel used in public transport to reduce pollution isAnswerCNGView full question & answer→
Question 41 MarkWhich of these gases is released during the process of respiration ?AnswerCarbon dioxideView full question & answer→
Question 51 MarkWhich of the following is not a greenhouse gas ?AnswerOxygenView full question & answer→
Question 61 MarkWhich of the following is the major constituent of air ?AnswerNitrogenView full question & answer→