Question

7. When a metal and a salt react to produce a new metal and a new salt, the reaction is one of a) b) c) d) simple decomposition double displacement direct combination displacement Which of the following is the formula for iodic acid? a. HI b) HIO c) HIO, d) H.IO 9. Which of the following is characteristic of a base in solution? a) b) c) d) has a soapy feel has a sour taste turns blue litmus red forms an electropositive OH radical 10. Hydrochloric acid is a strong electrolyte because a) the chlorine salts are strong electrolytes b) of its high degree of ionisation c) it is a conductor of electricity d) most of the chlorine salts are soluble II. Hydrogen and oxygen are two elements in a three-element compound. Which of the following is the most likely category for this compound? a) oxide b) anhydride c) acid salt d) ternary acid 12. Which of the following equations is a sample of simple decomposition? a) 2Mg +0, 2 Mgo b) 2NaNO, + 2NaNO, +0,T c) Pb(NO)2 + 2 KI → KNO, + Pbly d) Cl +2KBr +2KCI+ Bryt

Answer 1

Exemple: saut mg + Cacle - my Cl₂ + ca 2t metal Salt on this reactions, metal ol's place ca from Calle 1 (mg) therefese this i lacemend peach Ans = d = Displacement geaching ..? Ans - C HIO, Acid is protons donor. HI - Hydrogen jodide HIO - Hypoidous avid HIO, - Iodic acid He IOC - osthopemodi aura Base is bittes taste, Base tuans sed litmus blue. Base produc electro-ve ono in correct ans = ahas soapy feel eq. soup - soin O when a compound completely soluble in Caissociated ) in wats, then they are called an strong electrolyte. eg Hel HT +CIO Ans = b = High degree q Ionization]