S3T17:
Which of the following is suitable to replace PCC to convert a primary alcohol to an aldehyde?
Which of the following is suitable to replace PCC to convert a primary alcohol to an aldehyde?
Final Results
44%
A. Cu
12%
B. H₂, Ni
10%
C. H₂CrO₄
35%
D. KMnO₄, H⁺
S3:
Which of the following is not a reducing agent?
Which of the following is not a reducing agent?
Final Results
24%
A. Na
14%
B. H₂
52%
C. P₄O₁₀
10%
D. LiAlH₄
S3T18:
How many carbon atoms are there in the simplest ketone?
How many carbon atoms are there in the simplest ketone?
Final Results
17%
A. 1
18%
B. 2
63%
C. 3
2%
D. 4
S3T18:
What is the minimum number of carbon atoms in a carbonyl compound?
What is the minimum number of carbon atoms in a carbonyl compound?
Final Results
47%
A. 1
42%
B. 2
10%
C. 3
1%
D. 4
S3T17:
What is the latest IUPAC name of HOOC(CH₂)₄COOH, which is used to manufacture nylon 6,6?
What is the latest IUPAC name of HOOC(CH₂)₄COOH, which is used to manufacture nylon 6,6?
Final Results
8%
A. Adipic acid
31%
B. Hexanedioic acid
35%
C. Hexane-1,6-dioic acid
26%
D. Hexane-1,6-dicarboxylic acid
S3T19:
What is the IUPAC name of terephthalic acid, which has the formula HOOC–C₆H₄–COOH, where the two COOH groups are attached to opposite sides of the benzene ring?
What is the IUPAC name of terephthalic acid, which has the formula HOOC–C₆H₄–COOH, where the two COOH groups are attached to opposite sides of the benzene ring?
Final Results
42%
A. Benzene-1,4-dicarboxylic acid
18%
B. Benzene-1,4-dioic acid
23%
C. Phenyl-1,4-dioic acid
17%
D. 1,4-dibenzoic acid
S1T8:
What is the coordination number of the complex with the formula [Cu(en)₂Cl₂]?
What is the coordination number of the complex with the formula [Cu(en)₂Cl₂]?
Final Results
5%
A. 0
25%
B. 2
26%
C. 4
44%
D. 6
S1T8:
What is the oxidation number of Ni in Ni(CO)₄?
What is the oxidation number of Ni in Ni(CO)₄?
Final Results
51%
A. +4
12%
B. +2
34%
C. 0
3%
D. -4
S1T8:
What is the number of unpaired electrons in Fe after the formation of coordinate bonds in the complex with the formula [Fe(CN)₆]³⁻?
What is the number of unpaired electrons in Fe after the formation of coordinate bonds in the complex with the formula [Fe(CN)₆]³⁻?
Final Results
27%
A. 0
32%
B. 1
30%
C. 4
12%
D. 5
S1T8:
What is the number of unpaired electrons in Fe after the formation of coordinate bonds in the complex with the formula [Fe(H₂O)₆]²⁺?
What is the number of unpaired electrons in Fe after the formation of coordinate bonds in the complex with the formula [Fe(H₂O)₆]²⁺?
Final Results
37%
A. 0
26%
B. 1
30%
C. 4
7%
D. 5
S3T18:
Which of the following is the systematic name of CH₃CH₂CH₂COCH₃?
Which of the following is the systematic name of CH₃CH₂CH₂COCH₃?
Final Results
16%
A. Pentanone
61%
B. Pentan-2-one
2%
C. Pentan-4-one
20%
D. Methyl butanoate
S3T18:
What is the name of CH₃CH₂CHO?
What is the name of CH₃CH₂CHO?
Final Results
19%
A. Propanol
57%
B. Propanal
15%
C. 1-propanal
8%
D. Ethyl aldehyde
S3T15:
What is/are the final organic product(s) formed when C₆H₅CH=CHCHO is heated with KMnO₄, H⁺?
What is/are the final organic product(s) formed when C₆H₅CH=CHCHO is heated with KMnO₄, H⁺?
Final Results
19%
A. C₆H₅COOH
24%
B. C₆H₅CH₂CH₂COOH
46%
C. C₆H₅COOH, HOOC-COOH
11%
D. C₆H₅CH(OH)CH(OH)COOH
S1:
Which of the following statements is absolutely true?
Which of the following statements is absolutely true?
Final Results
35%
A. All elements have neutrons.
18%
B. All non-metals cannot conduct electricity.
22%
C. Atomic size always decreases with increasing proton number.
25%
D. Metallic elements are more abundant than non-metallic elements.
Good morning, students. Let us start revising the S1 syllabus with a simple question.
Which of the following elements does not form an oxide that can react with both acid and alkali?
Which of the following elements does not form an oxide that can react with both acid and alkali?
Final Results
30%
A. Al
16%
B. Ge
34%
C. Si
19%
D. Pb
S1T8:
Which of the following transition elements forms a cation with the lowest oxidation state?
Which of the following transition elements forms a cation with the lowest oxidation state?
Final Results
12%
A. Ti
11%
B. V
23%
C. Ni
54%
D. Cu
S1T8:
Which of the following transition elements forms a cation with the highest oxidation state?
Which of the following transition elements forms a cation with the highest oxidation state?
Final Results
63%
A. Mn
12%
B. V
14%
C. Fe
10%
D. Cr
S1T8:
Which of the following ions is NOT possible?
Which of the following ions is NOT possible?
Final Results
23%
A. Cr³⁺
11%
B. CrO₄²⁻
56%
C. CrO₄⁻
10%
D. Cr₂O₇²⁻
❤1
S1T8:
Which of the following transition elements exhibits the greatest number of oxidation states?
Which of the following transition elements exhibits the greatest number of oxidation states?
Final Results
65%
A. Mn
16%
B. Fe
9%
C. V
10%
D. Cr
S3T18:
Which of the following reagents is not suitable to distinguish ethanal and propanone?
Which of the following reagents is not suitable to distinguish ethanal and propanone?
Final Results
19%
A. [Ag(NH₃)₂]⁺, ⁻OH
21%
B. K₂Cr₂O₇, H⁺
24%
C. Cu²⁺, ⁻OH
36%
D. I₂, NaOH