Which of the following can be classified as a pure compound?
A) alcohol in water,C2H5OH in H2O
B) sugar,C12H22O11
C) carbon,C
D) iodine,I2
Correct Answer:
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Q2: Which of the following is a pure
Q22: Vegetable oil is a(an)_,and is found in
Q26: What is the symbol for tungsten?
A)W
B)Tu
C)Sn
D)St
E)Ti
Q30: List three examples of pure substances and
Q32: A reddish powder is heated gently in
Q36: Which element is not essential for human
Q36: What is the chemical symbol for chromium?
A)C
B)Ca
C)Cl
D)Cr
E)Cu
Q38: Which of the following observations demonstrates that
Q38: Which symbol does not denote a compound?
A)CO2
B)CCl4
C)C2H4
D)Cr
E)CaCO3
Q39: What is the chemical symbol for copper?
A)C
B)Ca
C)Cl
D)Cr
E)Cu
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