2nd Year Chemistry Chapter 16 Test16. Empirical Data Collection and Analysis

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. The abundance of M+1 peak depends mainly on:
   1. Hydrogen atoms
   2. Oxygen atoms
   3. Carbon atoms
   4. Nitrogen atoms
2. The slope of a graph (tan θ) can represent:
   1. Volume of gas
   2. Concentration of solution
   3. Physical quantities
   4. Calibration error
3. Which error can be reduced or eliminated by taking repeat trials?
   1. Random errors
   2. Systematic error
   3. Determinate error
   4. Rough error
4. Which error type can be reduced by repeating experiments and taking average?
   1. Systematic error
   2. Random error
   3. Calibration error
   4. Instrumental error
5. In sketched graphs, axes are:
   1. Labelled but not scaled
   2. Scaled but not labelled
   3. Neither labelled nor scaled
   4. Labelled and scaled
6. The scale in a drawn graph determines:
   1. Shape of the curve
   2. Interval of quantities on axes
   3. Whether data is dependent or independent
   4. Whether graph is qualitative
7. Parallax error while reading a burette is classified as:
   1. Systematic error
   2. Random error
   3. Blunder
   4. Theoretical error
8. Random errors are caused mainly by:
   1. Faulty instruments
   2. Human carelessness
   3. Uncontrollable factors
   4. Improper calibration
9. In a graph, the variable usually plotted on the y-axis is:
   1. Independent variable
   2. Dependent variable
   3. Control variable
   4. Constant variable
10. Random errors can be reduced by:
    1. Calibration of instruments
    2. Repeat trials and measurements
    3. Using impure reagents
    4. Increasing temperature fluctuations