MCQ 11 MarkWhich of the following is not a greenhouse gas?Acarbon dioxideBsulphur dioxideCmethane✓nitrogenAnswerCorrect option: D. nitrogenView full question & answer→
MCQ 21 MarkRespirationAis a slow processBis a natural and continuous processCtakes place at body temperature✓all of the aboveAnswerCorrect option: D. all of the aboveView full question & answer→
MCQ 31 MarkFuels which do not leave any residue on burning areAcoal and woodBcoal and $\ce{LPG}$Cwood and $\ce{CNG}$✓$\ce{LPG}$ and $\ce{CNG}$AnswerCorrect option: D. $\ce{LPG}$ and $\ce{CNG}$View full question & answer→
MCQ 41 MarkPhotosynthesis is a process in which plantsAtake in oxygen and give out carbon dioxide✓take in carbon dioxide and give out oxygenCtake in nitrogen and give out oxygenDnone of the aboveAnswerCorrect option: B. take in carbon dioxide and give out oxygenView full question & answer→
MCQ 51 MarkRust is✓hydrated iron oxideBhydrated copper sulphateCanhydrous iron oxideDnone of the aboveAnswerCorrect option: A. hydrated iron oxideView full question & answer→
MCQ 61 MarkThe gases which cause acid rain areAsulphur dioxide and oxygenBnitrogen and oxygenCcarbon dioxide and water vapour✓nitrogen dioxide and sulphur dioxideAnswerCorrect option: D. nitrogen dioxide and sulphur dioxideView full question & answer→
MCQ 71 MarkAir pollution is due to theAcutting of green plantsBgases like carbon monoxide, sulphur dioxide, etc.Csmoke given out by factories✓all of the aboveAnswerCorrect option: D. all of the aboveView full question & answer→
MCQ 81 MarkThe substance which accelerates the speed of a reaction without itself undergoing any change is called✓catalystBpollutantCfuelDnone of the aboveAnswerCorrect option: A. catalystView full question & answer→
MCQ 91 MarkAir consists ofAonly oxygenBonly nitrogenConly carbon dioxide✓all of theseAnswerCorrect option: D. all of theseView full question & answer→