307081
Which of the following is correct? (i) \(\dfrac{5.28 \times 0.156 \times 3}{0.0428}=57.7\) (ii) \(\dfrac{5.28 \times 0.156 \times 3}{0.0421}=58.7\) (iii) \(\dfrac{42.967 \times 0.02435}{0.34 \times 4}=0.77\)
1 (i) and (ii)
2 (i), (ii) and (iii)
3 (i) and (iii)
4 (ii) and (iii)
Explanation:
In all the cases, the reported quotient has the minimum number of significant figures, according to rules of multiplication & division.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
307082
Given the numbers: 161cm, 0.161 cm, 0.0161cm. The number of significant figures for the three numbers are
1 3, 4 and 5 respectively
2 3, 3 and 3 respectively
3 3, 3 and 4 respectively
4 3, 4 and 4 respectively
Explanation:
Each has three significant figures.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
307083
The number of significant figures in value of \(\mathrm{\pi}\) are
1 1
2 2
3 3
4 \(\mathrm{\infty}\)
Explanation:
\(\mathrm{\pi}\) is an irrational number (note that \(\mathrm{\pi \neq 22 / 7}\) as \(\mathrm{22 / 7}\) is a rational number) and it means it has infinite number of significant figures.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
307084
The correctly reported answer of the addition of \(4.523,2.3\) and 6.24 will have significant figures
1 two
2 three
3 four
4 five
Explanation:
\(4.523+2.3+6.24=13.063\). As 2.3 has least number of decimal places, i.e. one, therefore sum should be reported to one decimal place only. After rounding off, reported sum is 13.1 which has three significant figures.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
307068
Find the value of \(\mathrm{-197^{\circ} \mathrm{C}}\) temperature in Kelvin.
1 \(\mathrm{47 \mathrm{~K}}\)
2 \(\mathrm{76 \mathrm{~K}}\)
3 \(\mathrm{470 \mathrm{~K}}\)
4 \(\mathrm{760 \mathrm{~K}}\)
Explanation:
Relation between \(\mathrm{{ }^{\circ} \mathrm{C}}\) and \(\mathrm{\mathrm{K}}\) is \(\mathrm{\mathrm{K}={ }^{\circ} \mathrm{C}+273.15=-197^{\circ} \mathrm{C}+273.15}\) \(\mathrm{=76.15 \mathrm{~K} \approx 76 \mathrm{~K}}\)
307081
Which of the following is correct? (i) \(\dfrac{5.28 \times 0.156 \times 3}{0.0428}=57.7\) (ii) \(\dfrac{5.28 \times 0.156 \times 3}{0.0421}=58.7\) (iii) \(\dfrac{42.967 \times 0.02435}{0.34 \times 4}=0.77\)
1 (i) and (ii)
2 (i), (ii) and (iii)
3 (i) and (iii)
4 (ii) and (iii)
Explanation:
In all the cases, the reported quotient has the minimum number of significant figures, according to rules of multiplication & division.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
307082
Given the numbers: 161cm, 0.161 cm, 0.0161cm. The number of significant figures for the three numbers are
1 3, 4 and 5 respectively
2 3, 3 and 3 respectively
3 3, 3 and 4 respectively
4 3, 4 and 4 respectively
Explanation:
Each has three significant figures.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
307083
The number of significant figures in value of \(\mathrm{\pi}\) are
1 1
2 2
3 3
4 \(\mathrm{\infty}\)
Explanation:
\(\mathrm{\pi}\) is an irrational number (note that \(\mathrm{\pi \neq 22 / 7}\) as \(\mathrm{22 / 7}\) is a rational number) and it means it has infinite number of significant figures.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
307084
The correctly reported answer of the addition of \(4.523,2.3\) and 6.24 will have significant figures
1 two
2 three
3 four
4 five
Explanation:
\(4.523+2.3+6.24=13.063\). As 2.3 has least number of decimal places, i.e. one, therefore sum should be reported to one decimal place only. After rounding off, reported sum is 13.1 which has three significant figures.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
307068
Find the value of \(\mathrm{-197^{\circ} \mathrm{C}}\) temperature in Kelvin.
1 \(\mathrm{47 \mathrm{~K}}\)
2 \(\mathrm{76 \mathrm{~K}}\)
3 \(\mathrm{470 \mathrm{~K}}\)
4 \(\mathrm{760 \mathrm{~K}}\)
Explanation:
Relation between \(\mathrm{{ }^{\circ} \mathrm{C}}\) and \(\mathrm{\mathrm{K}}\) is \(\mathrm{\mathrm{K}={ }^{\circ} \mathrm{C}+273.15=-197^{\circ} \mathrm{C}+273.15}\) \(\mathrm{=76.15 \mathrm{~K} \approx 76 \mathrm{~K}}\)
307081
Which of the following is correct? (i) \(\dfrac{5.28 \times 0.156 \times 3}{0.0428}=57.7\) (ii) \(\dfrac{5.28 \times 0.156 \times 3}{0.0421}=58.7\) (iii) \(\dfrac{42.967 \times 0.02435}{0.34 \times 4}=0.77\)
1 (i) and (ii)
2 (i), (ii) and (iii)
3 (i) and (iii)
4 (ii) and (iii)
Explanation:
In all the cases, the reported quotient has the minimum number of significant figures, according to rules of multiplication & division.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
307082
Given the numbers: 161cm, 0.161 cm, 0.0161cm. The number of significant figures for the three numbers are
1 3, 4 and 5 respectively
2 3, 3 and 3 respectively
3 3, 3 and 4 respectively
4 3, 4 and 4 respectively
Explanation:
Each has three significant figures.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
307083
The number of significant figures in value of \(\mathrm{\pi}\) are
1 1
2 2
3 3
4 \(\mathrm{\infty}\)
Explanation:
\(\mathrm{\pi}\) is an irrational number (note that \(\mathrm{\pi \neq 22 / 7}\) as \(\mathrm{22 / 7}\) is a rational number) and it means it has infinite number of significant figures.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
307084
The correctly reported answer of the addition of \(4.523,2.3\) and 6.24 will have significant figures
1 two
2 three
3 four
4 five
Explanation:
\(4.523+2.3+6.24=13.063\). As 2.3 has least number of decimal places, i.e. one, therefore sum should be reported to one decimal place only. After rounding off, reported sum is 13.1 which has three significant figures.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
307068
Find the value of \(\mathrm{-197^{\circ} \mathrm{C}}\) temperature in Kelvin.
1 \(\mathrm{47 \mathrm{~K}}\)
2 \(\mathrm{76 \mathrm{~K}}\)
3 \(\mathrm{470 \mathrm{~K}}\)
4 \(\mathrm{760 \mathrm{~K}}\)
Explanation:
Relation between \(\mathrm{{ }^{\circ} \mathrm{C}}\) and \(\mathrm{\mathrm{K}}\) is \(\mathrm{\mathrm{K}={ }^{\circ} \mathrm{C}+273.15=-197^{\circ} \mathrm{C}+273.15}\) \(\mathrm{=76.15 \mathrm{~K} \approx 76 \mathrm{~K}}\)
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CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
307081
Which of the following is correct? (i) \(\dfrac{5.28 \times 0.156 \times 3}{0.0428}=57.7\) (ii) \(\dfrac{5.28 \times 0.156 \times 3}{0.0421}=58.7\) (iii) \(\dfrac{42.967 \times 0.02435}{0.34 \times 4}=0.77\)
1 (i) and (ii)
2 (i), (ii) and (iii)
3 (i) and (iii)
4 (ii) and (iii)
Explanation:
In all the cases, the reported quotient has the minimum number of significant figures, according to rules of multiplication & division.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
307082
Given the numbers: 161cm, 0.161 cm, 0.0161cm. The number of significant figures for the three numbers are
1 3, 4 and 5 respectively
2 3, 3 and 3 respectively
3 3, 3 and 4 respectively
4 3, 4 and 4 respectively
Explanation:
Each has three significant figures.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
307083
The number of significant figures in value of \(\mathrm{\pi}\) are
1 1
2 2
3 3
4 \(\mathrm{\infty}\)
Explanation:
\(\mathrm{\pi}\) is an irrational number (note that \(\mathrm{\pi \neq 22 / 7}\) as \(\mathrm{22 / 7}\) is a rational number) and it means it has infinite number of significant figures.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
307084
The correctly reported answer of the addition of \(4.523,2.3\) and 6.24 will have significant figures
1 two
2 three
3 four
4 five
Explanation:
\(4.523+2.3+6.24=13.063\). As 2.3 has least number of decimal places, i.e. one, therefore sum should be reported to one decimal place only. After rounding off, reported sum is 13.1 which has three significant figures.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
307068
Find the value of \(\mathrm{-197^{\circ} \mathrm{C}}\) temperature in Kelvin.
1 \(\mathrm{47 \mathrm{~K}}\)
2 \(\mathrm{76 \mathrm{~K}}\)
3 \(\mathrm{470 \mathrm{~K}}\)
4 \(\mathrm{760 \mathrm{~K}}\)
Explanation:
Relation between \(\mathrm{{ }^{\circ} \mathrm{C}}\) and \(\mathrm{\mathrm{K}}\) is \(\mathrm{\mathrm{K}={ }^{\circ} \mathrm{C}+273.15=-197^{\circ} \mathrm{C}+273.15}\) \(\mathrm{=76.15 \mathrm{~K} \approx 76 \mathrm{~K}}\)
307081
Which of the following is correct? (i) \(\dfrac{5.28 \times 0.156 \times 3}{0.0428}=57.7\) (ii) \(\dfrac{5.28 \times 0.156 \times 3}{0.0421}=58.7\) (iii) \(\dfrac{42.967 \times 0.02435}{0.34 \times 4}=0.77\)
1 (i) and (ii)
2 (i), (ii) and (iii)
3 (i) and (iii)
4 (ii) and (iii)
Explanation:
In all the cases, the reported quotient has the minimum number of significant figures, according to rules of multiplication & division.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
307082
Given the numbers: 161cm, 0.161 cm, 0.0161cm. The number of significant figures for the three numbers are
1 3, 4 and 5 respectively
2 3, 3 and 3 respectively
3 3, 3 and 4 respectively
4 3, 4 and 4 respectively
Explanation:
Each has three significant figures.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
307083
The number of significant figures in value of \(\mathrm{\pi}\) are
1 1
2 2
3 3
4 \(\mathrm{\infty}\)
Explanation:
\(\mathrm{\pi}\) is an irrational number (note that \(\mathrm{\pi \neq 22 / 7}\) as \(\mathrm{22 / 7}\) is a rational number) and it means it has infinite number of significant figures.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
307084
The correctly reported answer of the addition of \(4.523,2.3\) and 6.24 will have significant figures
1 two
2 three
3 four
4 five
Explanation:
\(4.523+2.3+6.24=13.063\). As 2.3 has least number of decimal places, i.e. one, therefore sum should be reported to one decimal place only. After rounding off, reported sum is 13.1 which has three significant figures.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
307068
Find the value of \(\mathrm{-197^{\circ} \mathrm{C}}\) temperature in Kelvin.
1 \(\mathrm{47 \mathrm{~K}}\)
2 \(\mathrm{76 \mathrm{~K}}\)
3 \(\mathrm{470 \mathrm{~K}}\)
4 \(\mathrm{760 \mathrm{~K}}\)
Explanation:
Relation between \(\mathrm{{ }^{\circ} \mathrm{C}}\) and \(\mathrm{\mathrm{K}}\) is \(\mathrm{\mathrm{K}={ }^{\circ} \mathrm{C}+273.15=-197^{\circ} \mathrm{C}+273.15}\) \(\mathrm{=76.15 \mathrm{~K} \approx 76 \mathrm{~K}}\)