Scientific Method Chemistry quiz for Measurements
Multiple Choice Questions:
1. How to measure the mass of substance?
a. physical balance
b. digital balance
c. both of them
d. none of the above
2. Which chemist insisted on the use of balance?
a. Antoine Lavoisier
b. Michel Faraday
c. Lord Davis
d. None of them
3. Who demonstrated “ Law of Conservation of mass”?
a. Galileo Galilei
b. Michel Faraday
c. Antoine Lavoisier
d. John Dalton
4. What is the “Law of Conservation of mass principle”?
a. total mass change during the reaction
b. total mass remains constant during the reaction
c. both of them
d. none of them
5. Magnesium bulb experiment, the weight that is 11.2 gm. After the burning with electrical energy, the weight of that bull is 11.2 gm.
6. Weight of the object, which statement is correct
a. object weight is more at the equator
b. object weight more at the north and south pole
c. same in all places
d. all of them
7. What is weight
a. multiplication of mass and velocity
b. multiplication of mass and force
c. multiplication of mass and gravity due to acceleration
d. multiplication of mass and acceleration
8. Variables of the experiment
a. mass and temperature
b. volume and distance
c. both a and b
d. none of them
9. Example of derived variables
a. force and pressure
b. velocity and acceleration
c. both a and b
d. none of them
10. The experiment is,
a. Observation of natural phenomenon carried out in a controlled manner. So that the results can be duplicated and rational conclusion obtained
b. Observation of natural phenomenon carried out in an uncontrolled manner. So that the results can be duplicated and rational conclusion obtained
c. Observation of natural phenomenon carried out in a controlled manner. So that the results can be duplicated and irrational conclusion obtained
d. all of them
11. A law is,
a. a concise statement or mathematical equation about basic relationship or regularity of nature.
b. a concise statement or nonmathematical equation about relationship or regularity of nature.
c. a concise statement or nonmathematical equation about no relationship or no regularity of nature.
d. a concise statement or mathematical equation about no relationship or no regularity of nature.
12. Scientific explanation helps us
a. organise things
b. predict past events
c. organise knowledge and predict future events
d. all of them
13. The hypothesis is
a. A tentative explanation of some nonregularity of nature.
b. A tentative explanation of some regularity of nature.
c. An exact explanation of some regularity of nature.
d. none of the above
14. The statement is “to propose new experiment to be tested ”
a. synopsis
b. Hypothesis
c. both a and b
d. none of them
15. The theory is
a. Tested explanation of basic natural phenomena
b. proposal of basic natural phenomena
c. thought experimentation of basic natural phenomena
d. all of them
16. Main aspects of science are
a. observation or experimentation and explanation
b. explanation and theoretical
c. experimentation and nonobservation
d. none of them
17. Experiments give
a. observation of some irregularity
b. observation of some regularity
c. both a and b
d. none of them
18. Explanation leads to
a. less experiments and more hypothesis
b. more experiments and less hypothesis
c. more experiments and more hypothesis
d. all of them
19. Scientific method is
a. process of laws, hypothesis and new experiments
b. hypothesis and new experiments
c. process of laws and hypothesis
d. process of laws and new experiments
20. How to differentiate cisplatin and transplatin
a. melting point
b. solubility in water
c. both a and b
d. none of them
21. Measurement is
a. comparison of physical quantity
b. comparison of colour change
c. comparison of taste
d. none of them
22. Statement of compassion is
a. nonunit of measurement
b. unit of measurement
c. both a and b
d. none of them
23. Centimetre scale is
a. standard comparison of time
b. standard comparison of temperature
c. standard comparison of length
d. all of them
24. Measurement numerically is
a. measured number and unit
b. measured colour and unit
c. measured number and colour
d. all of them
25. What is precision
a. The different set of values obtained from an identical measurement of quantity.
b. The closeness of the set of values obtained from an identical measurement of quantity.
c. The far of the set of values obtained from identical measurement of quantity.
d. all of them.
26. What is accuracy
a. The closeness of the single measurement to its true value.
b. The far of the single measurement to its true value.
c. The closeness of the more measurement to its true value.
d. none of them.
27. What are the significant figures?
a. Those digits of the number that include all certain digits minus a final one have some uncertainty.
b. Those whole of number that include all certain digits plus a final one have some uncertainty.
c. Those digits of number that include all certain digits plus a final one have some uncertainty.
d. All of them
28. Number of significant figures
a. The number of digits reported for a measured quantity, indicating the precision of the value.
b. The number of digits reported for a nonmeasured quantity, indicating the precision of the value.
c. The number of digits not reported for a measured quantity, indicating the precision of the value.
d. All of them
29. what is the number of significant figures of 9.12 cm and 9.124 cm
a. 5 and 6
b. 6 and 5
c. 3 and 4
d. 4 and 3
30. What is the number of the significant figure of 9.12 cm, 0.912 cm and 0.00912 cm
a. 3
b. 4
c. 2
d. 5
31. What is a significant figure of 9.00 cm, 9.10 cm and 90.0 cm
a. 4
b. 3
c. 5
d. 2
32. Scientific notation is
a. A X 10^{n}
b. A X 10^{n1}X10^{1n}
c. A
d. None of them
33. 9.0 x 10^{2} cm, what is a significant figure
a. 4
b. 6
c. 2
d. 0
34. 9.00 x 10^{2 }cm, what is a significant figure
a. 3
b. 6
c. 9
d. 1
35. What is rounding
a. the procedure of dropping significant digits
b. the procedure of adding nonsignificant digits
c. the procedure of adding significant digits
d. the procedure of dropping nonsignificant digits
36. Rounding of 1.2151 into two significant figure
a. 1.24
b. 1.23
c. 1.22
d. 1. 21
37. Rounding of 1.2143 into three significant figure
a. 1.24
b. 1.23
c. 1.22
d. 1. 21
38. Rounding of 1.225, 1.22500 and 1.21500 into three significant figure
a. 1.24
b. 1.23
c. 1.22
d. 1. 21
39. The exact number is
a. count items or number of units
b. discount items or number of nonunits
c. both a and b
b. none of them
40. 9.00 and 24.0, the exact number is
a. 1 time of 9 units and 24 times of 1 unit
b. 9 times of 1 unit and 1 time of 24 units
c. 9 times of 1 unit and 24 times of 1 unit
d. all of them
Answers:

1. c. both of them

a. Antoine Lavoisier

c. Antoine Lavoisier

b. total mass remains constant during the reaction

c. law of conservation of mass

b. object weight more at the north and south pole

c. multiplication of mass and gravity due to acceleration

a. mass and temperature

c. both a and b

a. Observation of natural phenomenon carried out in a controlled manner. So that the results can be duplicated and rational conclusion obtained

a. a concise the statement or mathematical equation about basic relationship or regularity of nature

c. organise knowledge and predict future events

b. A tentative explanation of some regularity of nature

b. Hypothesis

a. Tested explanation of basic natural phenomena

a. observation or experimentation and explanation

b. observation of some regularity

c. more experiments and more hypothesis

a. process of laws, hypothesis and new experiments

c. both a and b

a. comparison of physical quantity

b. unit of measurement

c. standard comparison of length

a. measured number and unit

b. The closeness of the set of values obtained from an identical measurement of quantity.

a. The closeness of the single measurement to its true value.

c. Those digits of number that include all certain digits plus a final one have some uncertainty.

a. The number of digits reported for a measured quantity, indicating the precision of the value.

c. 3 and 4

a. 3

b. 3

a. A x 10^{n}

c. 2

a. 3

b. the procedure of adding nonsignificant digits

c. 1.22

d. 1. 21

c. 1.22

a. count items or number of units

d. all of them