Chapter 5 - 

Objects Around Us (āφāĻŽাā§° āϚৌāĻĒাāĻļā§° āĻŦāϏ্āϤুāĻŦোā§°)

āĻļুāĻĻ্āϧ āωāϤ্āϤ⧰āĻŦোā§° (MCQ Answers):

1. āĻļুāĻĻ্āϧ āωāϤ্āϤ⧰⧰ āĻ—োāϞāϟো āϏāĻŽ্āĻĒূāϰ্āĻŖ āĻĒূā§° āϕ⧰া।

(i) āĻĻ্āϰāĻŦ্āϝāχ āϝি āĻĒā§°িāĻŽাāĻŖā§° āĻ াāχ āφāĻ—ুā§°ি āĻĨাāĻ•ে āϤাāĻ• āĻ•ি āĻŦুāϞি āĻ•োā§ąা āĻšā§Ÿ?

(a) āĻĒāĻĻাāϰ্āĻĨ
(b) āĻ­āĻŦ 
(c) āĻ†ā§ŸāϤāύ
(d) āĻ•াāϞি

āωāϤ্āϤ⧰: (c) āĻ†ā§ŸāϤāύ

(ii) āϤāϞ⧰ āĻ•োāύāĻŦিāϧ āϏ্āĻŦāϚ্āĻ›?

(a) āĻ•াāĻ 
(b) āĻ•াāϚ
(c) āϞো
(d) āĻ•াāĻ—āϜ

āωāϤ্āϤ⧰: (b) āĻ•াāϚ

(iii) āϤāϞ⧰ āĻ•োāύāĻŦিāϧ āĻ…āϰ্āϧāϏ্āĻŦāϚ্āĻ›।

(a) āĻ•াāϚ⧰ āĻ—িāϞাāϚ
(b) āĻĻাāĻĒোāĻŖ
(c) āϤেāϞāϏāύা āĻ•াāĻ—āϜ
(d) āώ্āϟিāϞ⧰ āĻ—িāϞাāϚ

āωāϤ্āϤ⧰: (c) āϤেāϞāϏāύা āĻ•াāĻ—āϜ

(iv) āϤāϞ⧰ āĻ—োāϟāϟোā§° āĻĒā§°া āĻ…āĻŽিāϞāϟো āĻŦাāĻ›ি āωāϞিāĻ“ā§ąা।

(a) āϏোāĻŖ
(b) āϤাāĻŽ
(c) āĻāϞুāĻŽিāύি⧟াāĻŽ
(d) āĻŦাঁāĻš

āωāϤ্āϤ⧰: (d) āĻŦাঁāĻš 

3. āĻĒāĻĻাāϰ্āĻĨ āĻ•ি? āωāĻĻাāĻšā§°āĻŖāϏāĻš āĻŦ্āϝাāĻ–্āϝা āϕ⧰া।
āωāϤ্āϤ⧰: āĻĒāĻĻাāϰ্āĻĨ āĻšৈāĻ›ে āĻāύে āĻŦāϏ্āϤু āϝাā§° āĻ“āϜāύ āφāĻ›ে āφ⧰ু āϏ্āĻĨাāύ āφāĻ—ুā§°ে।
āωāĻĻাāĻšā§°āĻŖ: āϞোāĻšা, āĻ•াāĻ , āĻŦা⧟ু, āĻĒাāύী āφāĻĻি।

4. āĻ•ি āĻĻুāϟা āϧāϰ্āĻŽā§° āϏāĻšা⧟āϤ āφāĻŽি āĻ•’āĻŦ āĻĒাā§°ো āϝে āĻļিāϞ āĻāĻŦিāϧ āĻĒāĻĻাāϰ্āĻĨ?
āωāϤ্āϤ⧰: āĻļিāϞ⧰ āĻ“āϜāύ āφāĻ›ে āφ⧰ু āĻāχāϟোā§ąে āϏ্āĻĨাāύ āφāĻ—ুā§°ে। āĻāχ āĻĻুāϟা āϧāϰ্āĻŽā§° āĻĻ্āĻŦাā§°া āφāĻŽি āĻ•’āĻŦ āĻĒাā§°ো āϝে āĻļিāϞ āĻāĻŦিāϧ āĻĒāĻĻাāϰ্āĻĨ।

5. āϚাā§°িāĻŦিāϧ āĻĻ্āϰāĻŦ্āϝ⧰ āύাāĻŽ āϞিāĻ–া āϝাā§° āϏāĻšা⧟āϤ āĻ—িāϞাāϚ āϤৈ⧟াā§° āϕ⧰িāĻŦ āĻĒাā§°ি।
āωāϤ্āϤ⧰:

    ● āĻŦাāϞি
    ● āϚুāύ
    ●  āϏোāĻĄা
    ● āĻŦā§°াāĻ•
6. āϜ্āϝোāϤি āĻ•ি?
āωāϤ্āϤ⧰: āϝি āĻŦāϏ্āϤুā§° āĻĒā§°া āĻĒোāĻšā§° āĻ“āϞা⧟ āϤাāĻ• āϜ্āϝোāϤিāĻŽাāύ āĻŦāϏ্āϤু āĻŦা āϜ্āϝোāϤি āĻŦোāϞা āĻšā§Ÿ।

7. āϤāϞ⧰ āĻŦাāĻ•্āϝāĻŦোā§° āĻļুāĻĻ্āϧāύে āĻ…āĻļুāĻĻ্āϧ āϞিāĻ–া।
(a) āĻ•াāĻ  āϏ্āĻŦāϚ্āĻ› āĻ•িāύ্āϤু āĻ•াāϚ āĻ…āϏ্āĻŦāϚ্āĻ› – āĻ…āĻļুāĻĻ্āϧ
(b) āĻ•াāĻ ā§° āĻ—ু⧜ি āĻĒাāύীāϤ āĻĻ্āϰāĻŦীāĻ­ূāϤ āĻšā§Ÿ। – āĻ…āĻļুāĻĻ্āϧ
(c) āĻĒাāύীāϤ āύিāĻŽāĻ– āĻĻ্āϰāĻŦীāĻ­ূāϤ āĻšā§Ÿ। – āĻļুāĻĻ্āϧ
(d) āĻ•াāĻ ā§° āϟুāĻ•ুā§°া āĻĒাāύীāϤ āĻ“āĻĒāĻ™ে। – āĻļুāĻĻ্āϧ
(e) āύাā§°িāĻ•āϞ⧰ āϤেāϞ āĻĒাāύীāϤ āĻĻ্āϰāĻŦীāĻ­ূāϤ āĻšā§Ÿ – āĻ…āĻļুāĻĻ্āϧ
(f) āĻ—্āϞিāĻ›াā§°িāύ āĻĒাāύীāϤ āĻĻ্āϰāĻŦীāĻ­ূāϤ āĻšā§Ÿ। – āĻļুāĻĻ্āϧ
(g) āϤাāĻŽ āφ⧰ু āϞো āϜ্āϝোāϤিāĻŽাāύ āĻĻ্āϰāĻŦ্āϝ। – āĻļুāĻĻ্āϧ
(h) āĻŦা⧟ু āϏ্āĻŦāϚ্āĻ›। – āĻļুāĻĻ্āϧ


8. āϤāϞāϤ āĻĻি⧟া āĻŦāϏ্āϤুāĻŦোā§°ā§° āϞāĻ—āϤ āϏāĻ িāĻ• āĻĻ্āϰāĻŦ্āϝāĻŦোā§° āĻŽিāϞোā§ąা
āωāϤ্āϤ⧰:                                 āĻŦāϏ্āϤু                       āĻĻ্āϰāĻŦ্āϝ

                                          āϟোāĻ•া āĻŦāĻšী             āĻ•াāĻ—āϜ

                                           āĻ—āϜাāϞ                       āϞো

                                           āϚāĻ•ী                      āĻ•াāĻ 

                                           āĻ—িāϞাāϚ                      āĻ•াāϚ

                                           āϏূāϤা                     āĻ•āĻĒাāĻš

9. āĻĒ্āϞাāϏ্āϟিāĻ•েā§°ে āϤৈ⧟াā§°ী āĻĒাঁāϚāĻŦিāϧ āĻŦāϏ্āϤুā§° āύাāĻŽ āϞিāĻ–া।
āωāϤ্āϤ⧰:

    1. āĻŦāϟāϞ

    2. āĻ•āϞāĻŽ

    3. āϚাāĻ•ি

    4. āϟোāĻĒোāϞা

    5. āĻ–েāϞāύাāĻŦোā§°

10. āĻ–াāϞী āĻ াāχ āĻĒূā§° āϕ⧰া:
i) āĻāĻ•েāϟা āĻŦāϏ্āϤু āĻŦিāĻ­িāύ্āύ ---------------ā§°ে āĻ—āĻ িāϤ āĻš'āĻŦ āĻĒাāĻŦে।
āωāϤ্āϤ⧰:  āĻĒāĻĻাā§°্āĻĨ

ii) āĻŦāϏ্āϤুāĻŦোā§°āĻ• āĻ­াāĻ— āϕ⧰া āĻĒāĻĻ্āϧāϤিāϟোāĻ• -------------------āĻŦুāϞি āĻ•োā§ąা āĻšā§Ÿ।
āωāϤ্āϤ⧰:  āĻŦā§°্āĻ—ীāϕ⧰āĻŖ

iii) āĻŦāϏ্āϤু āĻāϟাāϤ āĻĨāĻ•া āĻĒāĻĻাā§°্āĻĨā§° āĻĒā§°িāĻŽাāĻŖেāχ āĻš'āϞ ------------------āĻŦāϏ্āϤুāϟোā§°
āωāϤ্āϤ⧰:  āĻ“āϜāύ

iv) āĻŦāϏ্āϤু āĻāϟাāχ āϝিāĻŽাāύ āĻ াāχ āφāĻ—ুā§°ে āϏে⧟ে--------------------- āĻŦāϏ্āϤুāϟোā§°
āωāϤ্āϤ⧰: āĻ†ā§ŸāϤāύ 


11. āĻŦāϏ্āϤু āĻŦা āĻĒāĻĻাā§°্āĻĨā§° āϧ⧰্āĻŽā§° āĻ­িāϤ্āϤিāϤ āĻŽিāϞোā§ąা:
āωāϤ্āϤ⧰:                                  āĻŦāϏ্āϤু āĻŦা āĻĒāĻĻাā§°্āĻĨ                            āϧāϰ্āĻŽ

                                             āϤীāĻ–াā§°ে āύিā§°্āĻŽিāϤ āĻ•াঁāĻšী              āĻĒাāύীāϤ āĻĻ্āϰāĻŦāĻŖী⧟

                                             āĻ•াāϚ⧰ āĻŦāϟāϞ                                āϏ্āĻŦāϚ্āĻ›

                                             āĻ•াāĻ ā§° āϟুāĻ•ুā§°া                       āĻ…āϏ্āĻŦāϚ্āĻ›

                                              āύিāĻŽāĻ–                                     āĻĒাāύীāϤ āĻĻ্āϰāĻŦāĻŖী⧟

                                              āϤাāĻŽ āφ⧰ু āϞো                      āϜ্āϝোāϤিāĻŽাāύ

12. āĻŦেāĻž্āϚ āϤৈ⧟াā§°ā§° āĻŦাāĻŦে āωāĻĒāϝুāĻ•্āϤ āĻĒāĻĻাā§°্āĻĨ āφ⧰ু āϤাā§° āϧāϰ্āĻŽ:
āωāϤ্āϤ⧰: āĻŽāχ āĻŦেāĻž্āϚ āϤৈ⧟াā§°ā§° āĻŦাāĻŦে āϞো āĻŦা āĻ•াāĻ  āύিā§°্āĻŦাāϚāύ āϕ⧰িāĻŽ।
āĻ•াā§°āĻŖ:

    āĻŽāϜāĻŦুāϤ

    āĻĻীāϘāϞী⧟া āϏāĻŽā§Ÿ āϧ⧰ি āϟিāĻ•ি āĻĨাāĻ•িāĻŦ āĻĒাā§°ে (āĻĻীāϰ্āϘāϏ্āĻĨা⧟ী)

    āĻĒā§°িāϏ্āĻ•াā§° ā§°ূāĻĒāϤ āφāĻ•াā§° āĻĻিāĻŦ āĻĒā§°া āϝা⧟


13. āĻĒাāύীāϤ āĻŽিāĻšāϞি āĻšোā§ąা āĻŦāϏ্āϤুā§° āϤাāϞিāĻ•া:
āωāϤ্āϤ⧰:āĻĒাāύীāϤ āĻŽিāĻšāϞি āĻšā§Ÿ (āĻĻ্ā§°āĻŦāĻŖী⧟ āĻŦāϏ্āϤু):

    āύিāĻŽāĻ–

    āύেāĻŽুā§° ā§°āϏ

    āĻĒাāύীāϤ āĻŽিāĻšāϞি āύāĻšā§Ÿ (āĻ…āĻĻ্ā§°āĻŦāĻŖী⧟ āĻŦāϏ্āϤু):

    āĻŦাāϞি


Additional Question-Answer (Based on Given Text)

(1) āĻŦāϏ্āϤু āφ⧰ু āĻĒāĻĻাā§°্āĻĨā§° āĻŽাāϜāϤ āĻ•ি āĻĒাā§°্āĻĨāĻ•্āϝ āφāĻ›ে?

āωāϤ্āϤ⧰: āĻĒāĻĻাā§°্āĻĨ āĻšৈāĻ›ে āϝিāĻ•োāύো āĻŦāϏ্āϤু āĻ—āĻ āύ āϕ⧰া āĻŽৌāϞিāĻ• āĻāĻ•āĻ•, āϝেāύে āϞোāĻšা, āϤাāĻŽ, āϜāϞ।

āĻŦāϏ্āϤু āĻšৈāĻ›ে āĻāχ āĻĒāĻĻাā§°্āĻĨāĻŦোā§°েā§°ে āϤৈ⧟াā§° āĻšোā§ąা āĻŦāϏ্āϤু, āϝেāύে āϟেāĻŦুāϞ, āĻŦāϟāϞ, āĻ—িāϞাāϚ।

(2) āĻĒাāύীāϤ āĻĻ্āϰāĻŦāĻŖী⧟ āĻŦāϏ্āϤু āφ⧰ু āĻ…āĻĻ্āϰāĻŦāĻŖী⧟ āĻŦāϏ্āϤুā§° āϤাāϞিāĻ•া āĻĻি⧟া।

āωāϤ্āϤ⧰: āĻĒাāύীāϤ āĻĻ্āϰāĻŦāĻŖী⧟:

    āϚেāύি

    āύিāĻŽāĻ–

    āĻŽৌ

āĻĒাāύীāϤ āĻ…āĻĻ্āϰāĻŦāĻŖী⧟:

    āĻŦাāϞি

    āϚāϕ⧰ āĻ—ু⧜ি

    āύাā§°িāĻ•āϞ⧰ āϤেāϞ

(3) āϏ্āĻŦāϚ্āĻ›, āĻ…āϏ্āĻŦāϚ্āĻ› āφ⧰ু āĻ…āϰ্āϧāϏ্āĻŦāϚ্āĻ› āĻŦāϏ্āϤুā§° āĻĒ্ā§°āϤ্āϝেāϕ⧰ āĻāϟা āωāĻĻাāĻšā§°āĻŖ āĻĻি⧟া।

āωāϤ্āϤ⧰: āϏ্āĻŦāϚ্āĻ›: āĻ•াāϚ

āĻ…āϰ্āϧāϏ্āĻŦāϚ্āĻ›: āϤেāϞāϏāύা āĻ•াāĻ—āϜ

āĻ…āϏ্āĻŦāϚ্āĻ›: āĻ•াāĻ 

(4) āĻ•িāĻ›ুāĻŽাāύ āĻŦāϏ্āϤু āĻĒাāύীāϤ āĻ“āĻĒāĻ™ে, āĻ•িāĻ›ুāĻŽাāύ āĻĄুāĻŦ āϝাāϝ় — āĻ•াā§°āĻŖ āĻ•ি?

āωāϤ্āϤ⧰: āĻĒাāύীāϤ āĻ“āĻĒāĻ™া āĻŦāϏ্āϤুāĻŦোā§°ā§° āϘāύāϤ্āĻŦ āĻĒাāύীā§° āϤুāϞāύাāϤ āĻ•āĻŽ āĻĨাāĻ•ে।

āϝিāĻŦোā§° āĻŦāϏ্āϤু āĻĒাāύীāϤ āĻĄুāĻŦ āϝাāϝ়, āϏেāχāĻŦোā§°ā§° āϘāύāϤ্āĻŦ āĻ…āϧিāĻ• āĻšāϝ়।

(5) āĻ—িāϞাāϚ āĻŦāύাāĻŦāϞৈ āĻŦ্āĻ¯ā§ąāĻšৃāϤ āĻĒāĻĻাā§°্āĻĨāĻŦোā§°ā§° āύাāĻŽ āϞিāĻ–া।

āωāϤ্āϤ⧰:

    āĻŦাāϞি

    āϚুāύ

    āϏোāĻĄা

    āĻ•াāϚ

    āϚুāύাāĻĒাāĻĨā§°

(6) āĻ•ি āϧ⧰āĻŖā§° āĻĒāĻĻাā§°্āĻĨā§° āĻĒā§°া āϜ্āϝোāϤি āĻ‰ā§ŽāĻĒāύ্āύ āĻšā§Ÿ?

āωāϤ্āϤ⧰: āϜ্āϝোāϤিāĻŽাāύ āĻĒāĻĻাā§°্āĻĨ, āϝেāύে āĻŦাāϞ্āĻŦ, āϏূā§°্āϝ āχ āφāϞোāĻ• āĻ‰ā§ŽāĻĒāύ্āύ āϕ⧰ে।

(7) āύিāϚ⧰ āĻŦāϏ্āϤুāĻŦোā§°ā§° āĻĒā§°া āĻ•ি āĻ•ি āϤৈ⧟াā§° āĻšā§Ÿ? āĻŽিāϞাāĻ“ —

                                    āĻŦāϏ্āϤু                                   āϤৈ⧟াā§° āϕ⧰া āĻĒāĻĻাā§°্āĻĨ

                                   āϟোāĻ•া āĻŦāĻšী                          āĻ•াāĻ—āϜ

                                    āĻ—āϜাāϞ                                    āϞো

                                     āϚāĻ•ী                                    āĻ•াāĻ 

                                    āĻ—িāϞাāϚ                                    āĻ•াāϚ

                                      āϏূāϤা                                   āĻ•āĻĒাāĻš

(8) āĻĒ্āϞাāώ্āϟিāϕ⧰ āĻĒā§°া āϤৈ⧟াā§° āĻĒাঁāϚāĻŦিāϧ āĻŦāϏ্āϤু:

āωāϤ্āϤ⧰:

    āĻŦাāϟ

    āĻŦāϟāϞ

    āĻ–েāϞāύা

    āĻŦাāϞ্āϟি

    āϚাāĻ•ি

āĻĒ্āϰāĻļ্āύ 9: āĻĒāĻĻাā§°্āĻĨ āφ⧰ু āĻŦāϏ্āϤুā§° āĻŽাāϜāϤ āĻ•ি āĻĒাā§°্āĻĨāĻ•্āϝ āφāĻ›ে?
āωāϤ্āϤ⧰: āĻĒāĻĻাā§°্āĻĨ āĻš'āϞ āĻŦāϏ্āϤু āĻ—āĻ āύ⧰ āωāĻĒাāĻĻাāύ। āĻŦāϏ্āϤু āĻŦāĻšুāϤো āĻĒāĻĻাā§°্āĻĨā§°ে āĻ—āĻ িāϤ āĻš'āĻŦ āĻĒাā§°ে।

āĻĒ্āϰāĻļ্āύ 10: āĻ•াāϚāĻ• āϏ্āĻŦāϚ্āĻ› āĻŦāϏ্āϤু āĻ•িāϝ় āĻ•োā§ąা āĻšāϝ়?
āωāϤ্āϤ⧰: āĻ•াāϚ⧰ āĻĒā§°া āĻĒোāĻšā§° āĻĒাā§° āĻšৈ āϝা⧟, āĻ—āϤিāĻ•ে āĻ•াāϚāĻ• āϏ্āĻŦāϚ্āĻ› āĻŦāϏ্āϤু āĻ•োā§ąা āĻšā§Ÿ।

āĻĒ্āϰāĻļ্āύ 11: āĻ—িāϞাāϚ⧰ āϤৈāϝ়াā§°āϤ āĻŦ্āĻ¯ā§ąāĻšাā§° āĻšোā§ąা āĻĒāĻĻাā§°্āĻĨāϏāĻŽূāĻš āĻ•িāϝ় āĻŦাāĻ›ি āϞোā§ąা āĻšāϝ়?
āωāϤ্āϤ⧰: āĻāχ āĻĒāĻĻাā§°্āĻĨāĻŦোā§° āĻ—ā§°āĻŽāϤ āĻ—āϞি āϝাāϝ় āφ⧰ু āĻĻ্ā§°ā§ą ā§°ূāĻĒ āϞৈ āĻ—িāϞাāϚ⧰ āφāĻ•ৃāϤি āϞāĻŦ āĻĒাā§°ে, āφ⧰ু āĻ াāĻŖ্āĻĄা āĻšোā§ąাā§° āĻĒিāĻ›āϤ āĻļāĻ•্āϤ āĻšā§Ÿ।

āĻĒ্āϰāĻļ্āύ 12: āĻ…āϰ্āϧāϏ্āĻŦāϚ্āĻ› āĻŦāϏ্āϤুā§° āĻāϟা āωāĻĻাāĻšā§°āĻŖ āĻĻিāϝ়া।
āωāϤ্āϤ⧰: āϤেāϞāϏāύা āĻ•াāĻ—āϜ āĻš'āϞ āĻ…āϰ্āϧāϏ্āĻŦāϚ্āĻ› āĻŦāϏ্āϤু।

āĻĒ্āϰāĻļ্āύ 13: āĻ…āϏ্āĻŦāϚ্āĻ› āĻŦāϏ্āϤুā§° āĻĒā§°া āĻĒোāĻšā§° āĻ•িāϝ় āĻĒাā§° āύāĻšāϝ়?
āωāϤ্āϤ⧰: āĻ…āϏ্āĻŦāϚ্āĻ› āĻŦāϏ্āϤু⧟ে āĻĒোāĻšā§° āϏāĻŽ্āĻĒূā§°্āĻŖāĻ­াā§ąে ā§°োāϧ āϕ⧰ি āĻĻি⧟ে, āĻ—āϤিāĻ•ে āĻĒোāĻšā§° āĻĒাā§° āύāĻšāϝ়।

OLD

Chapter - 5

 Separation of Substances

    đŸ‘‰Text Book PDF
    đŸ‘‰MCQ Online Exam
    đŸ‘‰MCQs Answer


Exercises (āĻ…āύুāĻļীāϞāύী)


1.    Why do we need to separate different components of a mixture? Give two examples.

Ans:- The elements in the mixture need to be separated, because-

    1) Non-use material has to be removed.

    2) Impurities or harmful elements have to be removed.

Example- Removing stones from rice,

                Milk churning to separate butter.


2.    what is winnowing? Where is it used?

Ans:- The method of separating the heavy and light components in a mixture by flowing into the air or air is called the process of harvesting.

This method is used to separate the thin rash or bark of heavy seeds (seeds) of the crop.


3.    How will you separate husk or dirt particles from a given sample of pulses before cooking.

Ans:- The bark or mold particles in the dal bought from the shop are washed with water before cooking, so that the impurities mixed with it, such as the soil roots and the dust, are separated. This process is known as the process of asraban.


4.   What is sieving? Where is it used?

Ans:-  In the sieve process, the fine grains in a mixture are pierced with holes and large size impurities remain in the sieve.

        The process of running the sieve is applied when the ingredients of the mixture are different in size. For example the process of running a sieve is used to separate the stones from the sand while building a house.


5.    How will you separate sand and water from their mixture?

Ans:- If the water mixed with the sand is left in a single vessel for some time without stirring it, the sand will be deposited in the bottom of the utensil. (Sedimentation process)


6.    Is it possible to separate sugar mixed with wheat flour? If yes, how will you do it?

Ans:- It is possible to separate the sugar mixed with the flour powder. In this case we should use sieves. Due to the smaller lumps of the flour, the sieve rolls down and remains in the sieve as the sugar grains are larger.


7.    How would you obtain clear water from a sample of muddy water?

Ans:- If the murky water is left in a vessel for a while without moving it, the bark or such substance accumulates in the bottom of the water. (Sedimentation process)

    If the water is not cleaned by the sedimentation process, the water can be cleaned using a small hole ing squirrel. (Filtration process)


8.    Fill up the blanks

(a)   The method of separating seeds of paddy from its stalks is called ---------------

Ans:- Dying.

(b)   When milk, cooled after boiling, is poured onto a piece of cloth the cream (maim) is left              behind on it. This process of separating cream from milk is an example of ----------------- 

Ans:- The process of filtration.

(c)    Salt is obtained from seawater by the process of ------------------

Ans:- Evaporation.

(d)    Impurities settled at the bottom when muddy water was kept overnight in a bucket. The                         example is called ----------------

Ans:- Filtration 


9.    True or False? 

(a)    A mixture of milk and water can be separated by filtration.

Ans:- False.

(b)    A mixture of powdered salt and sugar can be separated by the process of winnowing.

Ans:- False.

(c)    Separations of sugar from tea can be done with filtration.

Ans:- False.

(d)    Grain and husk can be separated with the process of decantation.

Ans:- False.


10.    Lemonade is prepared by mixing lemon juice and sugar in water. You wish to add ice to cool  it. Should you add ice to the lemonade before or after dissolving sugar? In which case would  it be possible to dissolve more sugar?        

Ans:- Lemon juice and sugar are mixed with water and made in lemon syrup. Ice is added to this syrup to cool it down. The ice should be given after dissolving the sugar.



 


Answer by:- Sourabh Bora

Check by - Mukesh Borah