Uncertainity in Measurement
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CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307069 Express 0.006006 into scientific notation in three significant digits:

1 \({\rm{6}}{\rm{.01 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}\)
2 \({\rm{6}}{\rm{.006 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}\)
3 \({\rm{6}}{\rm{.00 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}\)
4 \({\rm{6}}{\rm{.0 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307070 Assertion :
A number 138.42 can be written as \(1.3842 \times 10^{2}\) in scientific notation.
Reason :
In scientific notation, a number is generally expressed in the form of \(N \times 10^{n}\), where \(N\) is a number between \(1.00 \ldots\) and 9.999... and \(n\) is an exponent.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307071 Which of the following have same number of significant figures?
A. 0.00253
B. 1.0003
C. 15.0
D. 163
Choose the correct answer from the options given below:

1 A, B and C only
2 C and D only
3 A, C and D only
4 B and C only
JEE - 2023
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307072 Two students \(\rm{{\text{X}}}\) and \(\rm{{\text{Y}}}\) report the mass of the same substance as \(\mathrm{7.0 \mathrm{~g}}\) and \(\mathrm{7.00 \mathrm{~g}}\) respectively, which of the following statement is correct?

1 Both are equally accurate
2 \(\rm{{\text{X}}}\) is more accurate than \(\rm{{\text{Y}}}\)
3 \(\mathrm{\mathrm{Y}}\) is more accurate than \(\mathrm{\mathrm{X}}\)
4 Both are inaccurate scientifically
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CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307069 Express 0.006006 into scientific notation in three significant digits:

1 \({\rm{6}}{\rm{.01 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}\)
2 \({\rm{6}}{\rm{.006 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}\)
3 \({\rm{6}}{\rm{.00 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}\)
4 \({\rm{6}}{\rm{.0 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307070 Assertion :
A number 138.42 can be written as \(1.3842 \times 10^{2}\) in scientific notation.
Reason :
In scientific notation, a number is generally expressed in the form of \(N \times 10^{n}\), where \(N\) is a number between \(1.00 \ldots\) and 9.999... and \(n\) is an exponent.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307071 Which of the following have same number of significant figures?
A. 0.00253
B. 1.0003
C. 15.0
D. 163
Choose the correct answer from the options given below:

1 A, B and C only
2 C and D only
3 A, C and D only
4 B and C only
JEE - 2023
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307072 Two students \(\rm{{\text{X}}}\) and \(\rm{{\text{Y}}}\) report the mass of the same substance as \(\mathrm{7.0 \mathrm{~g}}\) and \(\mathrm{7.00 \mathrm{~g}}\) respectively, which of the following statement is correct?

1 Both are equally accurate
2 \(\rm{{\text{X}}}\) is more accurate than \(\rm{{\text{Y}}}\)
3 \(\mathrm{\mathrm{Y}}\) is more accurate than \(\mathrm{\mathrm{X}}\)
4 Both are inaccurate scientifically
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CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307069 Express 0.006006 into scientific notation in three significant digits:

1 \({\rm{6}}{\rm{.01 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}\)
2 \({\rm{6}}{\rm{.006 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}\)
3 \({\rm{6}}{\rm{.00 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}\)
4 \({\rm{6}}{\rm{.0 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307070 Assertion :
A number 138.42 can be written as \(1.3842 \times 10^{2}\) in scientific notation.
Reason :
In scientific notation, a number is generally expressed in the form of \(N \times 10^{n}\), where \(N\) is a number between \(1.00 \ldots\) and 9.999... and \(n\) is an exponent.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307071 Which of the following have same number of significant figures?
A. 0.00253
B. 1.0003
C. 15.0
D. 163
Choose the correct answer from the options given below:

1 A, B and C only
2 C and D only
3 A, C and D only
4 B and C only
JEE - 2023
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307072 Two students \(\rm{{\text{X}}}\) and \(\rm{{\text{Y}}}\) report the mass of the same substance as \(\mathrm{7.0 \mathrm{~g}}\) and \(\mathrm{7.00 \mathrm{~g}}\) respectively, which of the following statement is correct?

1 Both are equally accurate
2 \(\rm{{\text{X}}}\) is more accurate than \(\rm{{\text{Y}}}\)
3 \(\mathrm{\mathrm{Y}}\) is more accurate than \(\mathrm{\mathrm{X}}\)
4 Both are inaccurate scientifically
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CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307069 Express 0.006006 into scientific notation in three significant digits:

1 \({\rm{6}}{\rm{.01 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}\)
2 \({\rm{6}}{\rm{.006 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}\)
3 \({\rm{6}}{\rm{.00 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}\)
4 \({\rm{6}}{\rm{.0 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307070 Assertion :
A number 138.42 can be written as \(1.3842 \times 10^{2}\) in scientific notation.
Reason :
In scientific notation, a number is generally expressed in the form of \(N \times 10^{n}\), where \(N\) is a number between \(1.00 \ldots\) and 9.999... and \(n\) is an exponent.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307071 Which of the following have same number of significant figures?
A. 0.00253
B. 1.0003
C. 15.0
D. 163
Choose the correct answer from the options given below:

1 A, B and C only
2 C and D only
3 A, C and D only
4 B and C only
JEE - 2023
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307072 Two students \(\rm{{\text{X}}}\) and \(\rm{{\text{Y}}}\) report the mass of the same substance as \(\mathrm{7.0 \mathrm{~g}}\) and \(\mathrm{7.00 \mathrm{~g}}\) respectively, which of the following statement is correct?

1 Both are equally accurate
2 \(\rm{{\text{X}}}\) is more accurate than \(\rm{{\text{Y}}}\)
3 \(\mathrm{\mathrm{Y}}\) is more accurate than \(\mathrm{\mathrm{X}}\)
4 Both are inaccurate scientifically
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