Ques. No. 1

Ques. No. 1 Challengers* In each 4 C and 2m'. of was filled pieces in tube A. nail was put in test B. Was cd in C and a Wire placed •n tot tube O. h the following option isjare correct about atRh•e (a) Zinc more reactive than aluminium (b) Copper is more reactive than aluminium Zinc is more reactivc than copper (d) Zinc. iron silver and copper are less reactive than aluminium. 2 On the basis of the sequence of the given reactions identify the most and Jcast reactive elements: 6 7 8 x and z (c) Z and X (b) Y and Z (d) ZandY 3 A metal M has electronic configuration 2.8.3 and occurs in earth's crust and its oxide It is more reactive than zinc. Which of the following options (s) is/are correct? (a) The metal M is iron (b) The metal M is lead (c) Theore from which metal M is extracted in haematite. (d) Theore from which metalMis extracted is bauxite. 4 Metal With oxygen tofor•m metallic oxide MO This oxide reacts with moisture and carbon dioxide of the atmosphere to form a basic carbonate metal M. The (a) Cu 5 BeakersA.BandCcontain zincsulphate. silver nitrate and iron (11) sulphate solutions respectively C.opoer A student puts containing soll sulphate. brown coating nail which w a' (a) zinc sulph (c) copper sul Which of the f (b) cuso.qaq (d) CuSO, Hydrogen beca use (a) hydro temperat (b) riskof (c) hydrog temper (d) many Alloys arc metal or contain (a) Brass (c) Amalg E is an ele affected The eleme (a) coppe (c) alumi