NIOS Class 10 Science and Technology Chapter 1: Measurement in Science and Technology – Chapter-wise Important Questions and Answers

NIOS Class 10 Science and Technology Chapter 1: Measurement in Science and Technology |MCQs, Short & Long Answer Questions | 1.Measurement in Science and Technology

Chapter 1: MEASUREMENT IN SCIENCE AND TECHNOLOGY

1. Which of the following is not an SI unit?

A. Metre     B. Pound       C. Kilogram    D. second

Answer:  B. Pound

[ Pound is not an SI unit. It is a unit of mass mainly used in some countries, while kilogram is the SI unit of mass.]

2. If the mass of a solution in 10 μg it is the same as

A. 10-6 g    B. 10-12 g     C.  10-9 g     D. 10-3 g  

Answer:  A. 10-6 g     

[ We have, 10 μg=10×10-6 g=10-5 g  ]

3. Indicate whether the following statements are True or False. Write T for true and F for false

(i) SI units are arbitrary (ii) 1 mm²=10-3 m²     (iii) 10-15 g=1 mpg   (iv) SI unit for pressure is Pascal

Answer: (i) True

[ SI units are internationally accepted standard units.]

(ii) False

[ We have, 1 mm²= (10-3 m)2=10-6 m² ]

(iii) False

[ We have, 10-15 g=1 fg  ]

(iv) True

[ The SI unit of pressure is Pascal (Pa). ]

4. Represent the following measurements by using suitable SI prefixes

(i)  2×10-8 s  (ii)  1.54×10-10 m 

(iii) 1.98×10-6 mol  (iv) 200,000 kg

Answer: (i)  2×10-8 s=20×10-9 s=20 ns (nanoseconds) 

(ii)  1.54×10-10 m=154×10-12 m=154 pm  (picometres)

(iii) 1.98×10-6 mol=1.98 μmol (micromoles)

(iv) 200,000 kg=200×10³ kg=200 Mg (megagrams)

5. Give the SI units used while buying :.

A. Silk ribbon B. Milk C. Potatoes

Answer:  A. Silk ribbon → metre (m) (used for measuring length)
B. Milk → litre (L) (commonly used unit of volume)
C. Potatoes → kilogram (kg) (used for measuring mass)

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Posted 2 weeks ago