1.
Which of the following substances cannot be broken down by ordinary chemical
reactions?
a) water c) carbon dioxide b) gold d) glucose
2. Which of the following substances does not possess uniform composition?
a) pure water b) salt water c) helium gas d) salad
3. Which of the following is made up of only one type of atom?
a) NO b) He c) CO d) MgS
4. Which of the following represents a mixture?
a) NaCl(s) b) NaCl(l) c) NaCl(g) d) NaCl(aq)
5. Which of the following shows a ternary compound?
a) CO b) NaCl c) NH3 d) NaNO2
a) water c) carbon dioxide b) gold d) glucose
2. Which of the following substances does not possess uniform composition?
a) pure water b) salt water c) helium gas d) salad
3. Which of the following is made up of only one type of atom?
a) NO b) He c) CO d) MgS
4. Which of the following represents a mixture?
a) NaCl(s) b) NaCl(l) c) NaCl(g) d) NaCl(aq)
5. Which of the following shows a ternary compound?
a) CO b) NaCl c) NH3 d) NaNO2
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