I. Alkanlar bobi. Alkanlarning nomenklaturasi

3. Kreking.
1. Alkanlarning kreking jarayonini quyidagi tenglama bilan ifodalanadi:
CnH2n+2 → CmH2m+2 + CpH2p n=6 bo’lsa, m va p lar qanday qiymatlarga ega bo’lishi mumkin?
A) m = 1,2,3,4; p = 5,4,3,2 B) m = 1,2,4,5; p = 5,4,2,1
C) m = 2,4,5,6; p = 4,2,1,6 D) m = 1,3,4,5; p = 5,3,2,1
E) m = 2,3,4,5; p = 4,3,2,1
2. Alkanlarning kreking jarayonini quyidagi tenglama bilan ifodalash mumkin:
CnH2n+2 → CmH2m+2 + CpH2p Agar n=4 bo’lsa, kreking natijasida qanday uglevodorodlar hosil bo’lishi mumkin?
A) metan, propen, etan, etilen B) etan, propen, butin, metan
C) metan, etan, propen, penten D) etan, propen, buten, etilen
E) metan, propen, etan, propan
3. Butanni krekingi natijasida necha xil organik modda hosil bo’ladi? (degidrogenlash hodisasini hisobga olmang).
A) 6 B) 5 C) 4 D) 3 E) 2
4. Alkanlarning kreking jarayoni quyidagi tenglama bilan ifodalash mumkin:
CnH2n+2 → CmH2m+2 + CpH2p. Agar n=6 bo`lsa, tenglamadagi m va p lar qanday qiymatlarga ega bo`lishi mumkin?
A) m = 1,2,3,4; p = 5,4,3,2 B) m = 1,2,4,5; p = 5,4,2,1
C) m = 2,4,5,6; p = 4,2,1,6 D) m = 1,3,4,5; p = 5,3,2,1
E) m = 2,3,4,5; p = 4,3,2,1
5. Alkanlarning kreking jarayoni quyidagi tenglama bilan ifodalanadi: CnHm+2 → CmH2 m+2 + CpH2p. Agar n = 5 bo`lsa m va p larni toping.
A) m = 1,2; p = 4,3 B) m = 2,1; p = 3,4
C) m = 3,4; p = 1,2 D) m = 1,3; p = 4,3 E) m = 1,3; p = 4,5
6. Alkanlarning kreking jarayoni quyidagi tenglama bilan ifodalanadi: CnH2n+2 → CmH2 m+2 + CpH2p. Agar n = 7 bo`lsa m va p larni toping.
A) m = 2,3,4,5,6; p = 6,5,4,3,2 B) m = 1,2,3,4,5; p = 6,5,4,3,2
C) m = 1,2,3,4,5; p = 6,5,4,3,1 D) m = 1,2,3,4,5; p = 6,5,4,3,3
E) m = 1,2,3,4,5; p = 6,5,3,4,1
7. Alkanlarning kreking jarayoni quyidagi tenglama bilan ifodalanadi: CnH2n+2 → CmH2 m+2 + CpH2p. Agar n = 8 bo`lsa m va p larni qiymatlarini toping.
A) m = 1,2,3,4,5,6; p = 7,6,5,4,3,2 B) m = 2,3,4,5,6; p = 6,5,4,3,2
C) m = 2,3,4,1,6,7; p = 7,6,5,4,3,2 D) m = 1,2,3,4,5; p = 6,5,4,3,2
8. Alkanlarning kreking jarayoni quyidagi tenglama bilan ifodalanadi: CnH2n+2 → CmH2 m+2 + CpH2p bo`lsa n = 9 bo`lsa m va p larni qiymatini aniqlang.
A) m = 1,2,3,4,5,6,7; p = 8,7,6,5,4,3,2 B) m = 1,2,3,4,5,6,7; p = 8,7,6,5,4,3
C) m = 1,2,3,4,5,6,7; p = 8,7,6,4,3,2 D) m = 1,2,3,4,5,6,7; p = 7,6,4,3,2
9. Alkanlarning kreking jarayoni quyidagi tenglama bilan ifodalanadi: CnH2n+2 → CmH2m+2 + CpH2p bo`lsa n = 10 bo`lganda m va p larni aniqlang.
A) m = 1,2,3,4,5,6,7,8; p = 9,8,7,6,5,4,3,2 B) m = 2,3,4,5,6,7,8; p = 8,7,6,5,4,3,2
C) m = 1,2,3,4,5,6,7; p = 9,8,7,6,5,4,3 D) m = 1,2,3,4,5,6,7; p = 8,7,6,5,4,3,2