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10.鎂和鋁分別跟足量的稀硫酸反應(yīng),若要制得相同質(zhì)量的氫氣,則消耗掉鎂和鋁的質(zhì)量比是

····························································································································· [   ]

A.8:9           B.4:3           C.16:27         D.3:4

試題詳情

9.把等質(zhì)量的鋅片分別放叭下列各溶液中,充分反應(yīng)后,溶液質(zhì)量減少的是·········· [   ]

A.Na2SO4              B.CuSO4                 C.H2SO4                D.AgNO3

試題詳情

8.用相同質(zhì)量的鋅和鎂分別跟足量的稀硫酸反應(yīng),以縱坐標(biāo)表示生成氫氣的質(zhì)量,橫

坐標(biāo)表示反應(yīng)時(shí)間,符合反應(yīng)實(shí)際的圖像是··························································· [   ]

試題詳情

7.在硝酸銅和硝酸銀的混合溶液中,加入一定量的鐵粉,充分反應(yīng)后,過濾上述反應(yīng)的混合物,在濾液中滴加鹽酸有白色沉淀產(chǎn)生,則過濾得到的金屬是············································································ [   ]

A.Fe、Cu        B.Cu           C.Fe、Ag       D.Ag

試題詳情

6.將金屬,R和M分別浸入稀硫酸里,R溶解而M不溶解.將M浸入金屬T的硝酸鹽溶液里,M的表面析出T。這三種金屬由弱到強(qiáng)的順序是······························································································ [   ]

A.T、R、M      B.R、M、T      C.T、M、R      D.M、R、T

試題詳情

5.下列反應(yīng)中屬于置換反應(yīng)的是·········································································· [   ]

A.2Cu+O22CuO                         B.Fe+CuSO4FeSO4+Cu

C.CuO+COCu+CO2                                           D.NaCl+AgNO3AgCl+NaNO3

試題詳情

4.公元二世紀(jì),我國(guó)古代煉丹家魏伯陽著有(簡(jiǎn)易參同契)是世界上現(xiàn)存最早的一部煉丹專著。書中描寫道:“金入于猛火,色不奪精光。”這句話是指黃金的性質(zhì)在強(qiáng)熱條件下·············································· [   ]

A.很穩(wěn)定           B.很活潑           C.易氧化            D.易還原

試題詳情

3.下列各種材料中,屬于有機(jī)合成材料的是························································· [   ]

A.鋼鐵          B.水泥          C.聚乙烯            D.石灰石

試題詳情

l.下列變化屬于化學(xué)變化的暈················································································· [   ]

A.晾干的咸菜上出魂食鹽晶體             B..銅器上生銅綠

C.日光燈通電發(fā)光                         D.花生油在冬天凍結(jié)

2.下列物質(zhì)中,可由金屬跟稀硫酸反應(yīng)直接制取的是··········································· [   ]

A.Ag2SO4              B.CuSO4                 C.Fe2(SO4)3           D.A12(SO4)3

試題詳情

31.還原1克氧化銅所需要的氫氣,至少需要多少克含雜質(zhì)5%的鋅跟足量的稀硫酸反應(yīng)才能獲得?

試題詳情


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