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AXIT CABOXYLIC TRONG CAC DE THI DAI HOC- CAO DANG(2007-2012)

Cau 1: Cho 5,76 gam axit huu co X don chuc, mach ho tac dung het voi CaCO3 thu duoc 7,28 gam

muoi cua axit huu co. Cong thuc cau tao thu gon cua X la (Cho H = 1; C = 12; O = 16; Ca = 40)

A. CH2=CH-COOH. B. CH3COOH. C. HC≡C-COOH. D. CH3-CH2-COOH.

Cau 2: Dun 12 gam axit axetic voi 13,8 gam etanol (co H2SO4 dac lam xuc tac) den khi phan ung dat toi

trang thai can bang, thu duoc 11 gam este. Hieu suat cua phan ung este hoa la (Cho H = 1; C = 12; O = 16)

A. 55%. B. 50%. C. 62,5%. D. 75%.

Cau 3: Cho tat ca cac dong phan don chuc, mach ho, co cung cong thuc phan tu C2H4O2 lan luot tac

dung voi: Na, NaOH, NaHCO3. So phan ung xay ra la

A. 2. B. 5. C. 4. D. 3.

Cau 4: Dot chay hoan toan 0,1 mol mot axit cacboxylic don chuc, can vua du V lit O2 (o dktc), thu

duoc 0,3 mol CO2 va 0,2 mol H2O. Gia tri cua V la

A. 8,96. B. 11,2. C. 6,72. D. 4,48.

Cau 5: Cho cac chat: axit propionic (X), axit axetic (Y), ancol (ruou) etylic (Z) va dimetyl ete (T). Day gom cac chat duoc sap xep theo chieu tang dan nhiet do soi la

A. T, Z, Y, X. B. Z, T, Y, X. C. T, X, Y, Z. D. Y, T, X, Z.

Cau 6: De trung hoa 6,72 gam mot axit cacboxylic Y (no, don chuc), can dung 200 gam dung dich

NaOH 2,24%. Cong thuc cua Y la (cho H = 1, C = 12, O = 16, Na = 23)

A. CH3COOH. B. HCOOH. C. C2H5COOH. D. C3H7COOH.

Cau 7: Cho hon hop gom 0,1 mol HCHO va 0,1 mol HCOOH tac dung voi luong du Ag2O (hoac AgNO3) trong dung dich NH3, dun nong. Sau khi cac phan ung xay ra hoan toan, khoi luong Ag tao thanh la

A. 43,2 gam. B. 10,8 gam. C. 64,8 gam. D. 21,6 gam.

Cau 8: Trung hoa 8,2 gam hon hop gom axit fomic va mot axit don chuc X can 100 ml dung dich NaOH 1,5M. Neu cho 8,2 gam hon hop tren tac dung voi mot luong du dung dich AgNO3 trong NH3, dun nong thi thu duoc 21,6 gam Ag. Ten goi cua X la

A. axit acrylic. B. axit propanoic. C. axit etanoic. D. axit metacrylic.

Cau 9: Day gom cac chat co the dieu che truc tiep (bang mot phan ung) tao ra axit axetic la: A. CH3CHO, C2H5OH, C2H5COOCH3. B. CH3CHO, C6H12O6 (glucozo), CH3OH. C. CH3OH, C2H5OH, CH3CHO. D. C2H4(OH)2, CH3OH, CH3CHO.

Cau 10: Cho cac chat HCl (X); C2H5OH (Y); CH3COOH (Z); C6H5OH (phenol) (T). Day gom cac chat duoc sap xep theo tinh axit tang dan (tu trai sang phai) la:

A. (T), (Y), (X), (Z). B. (X), (Z), (T), (Y). C. (Y), (T), (Z), (X). D. (Y), (T), (X), (Z).

Cau 11: Hai hop chat huu co X, Y co cung cong thuc phan tu C3H6O2. Ca X va Y deu tac dung voi Na; X tac dung duoc voi NaHCO3 con Y co kha nang tham gia phan ung trang bac. Cong thuc cau tao cua X va Y lan luot la

A. C2H5COOH va HCOOC2H5. B. HCOOC2H5 va HOCH2COCH3.

C. HCOOC2H5 va HOCH2CH2CHO. D. C2H5COOH va CH3CH(OH)CHO.

Cau 12: Dot chay hoan toan 2,76 gam hon hop X gom CxHyCOOH, CxHyCOOCH3, CH3OH thu duoc

2,688 lit CO2 (dktc) va 1,8 gam H2O. Mat khac, cho 2,76 gam X phan ung vua du voi 30 ml dung

dich

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