MCQ 11 MarkWhich of the following metals does not give hydrogen with acids?AIron✓CopperCLeadDZincAnswerCorrect option: B. CopperView full question & answer→
MCQ 21 MarkWhich metal gives hydrogen with all of the following: water, acids, alkalis?A$Fe$✓$Zn$C$Mg$D$Pb$AnswerCorrect option: B. $Zn$View full question & answer→
MCQ 31 MarkFor the reaction $PbO + H _2 \rightarrow Pb + H _2 O$, which of the following statements is wrong?A$H _2$ is the reducing agent.BPbO is theoxidizing agent.✓PbO is oxidized to Pb .D$H _2$ is oxidized to $H _2 O$.AnswerCorrect option: C. PbO is oxidized to Pb .PbO is oxidized to Pb.View full question & answer→
MCQ 41 MarkWhich of the following statements about hydrogen is incorrect?AIt is an inflammable gasBIt is the lightest gas.CIt is not easily liquefied✓It is a strong oxidizing agent.AnswerCorrect option: D. It is a strong oxidizing agent.View full question & answer→
MCQ 51 MarkA metal oxide that is reduced by hydrogen isA$Al _2 O _3$✓CuOCCaOD$Na _2 O$AnswerCorrect option: B. CuOCuOView full question & answer→
MCQ 61 MarkReacting with water, an active metal producesAoxygenBnitric acid✓a baseDnone of theseAnswerCorrect option: C. a baseView full question & answer→
MCQ 71 MarkHelium is preferred to hydrogen for filling balloons because it is:Alighter than airBalmost as light as hydrogen✓non$-$combustibleDinflammableAnswerCorrect option: C. non$-$combustibleView full question & answer→
MCQ 81 Mark Elements which show unique nature in the preparation of hydrogen are:ANa, K, LiBMg, Ca, Ba✓Al, Zn,PbDFe, Cu, AgAnswerCorrect option: C. Al, Zn,PbAl, Zn, PbView full question & answer→
MCQ 91 MarkThe composition of the nucleus of deuterium isA$1 e^{-}$ and 1PB1 P and 1 A✓1 n and $1 e ^{-}$D2P and $1 e^{-}$AnswerCorrect option: C. 1 n and $1 e ^{-}$1 n and $1 e ^{-}$View full question & answer→
MCQ 101 MarkWhich metal absorbs hydrogen?A$Al$B$Fe$✓$Pd$D$K$AnswerCorrect option: C. $Pd$View full question & answer→
MCQ 111 MarkHydrogen is evolved by the action of cold dil. $\ce{HNO}_3$ onA$Fe$B$Cu$✓$Mg$D$Zn$AnswerCorrect option: C. $Mg$View full question & answer→