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Asitler, Bazlar ve Tuzlar Sınıf 7 Bilim NCERT

Asitler, Bazlar ve Tuzlar Sınıf 7 Bilim NCERT

সকল স্তর • 5 বক্তৃতা • আজীবন অ্যাক্সেস
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Asitler, Bazlar ve Tuzlar Sınıf 7 Bilim NCERT
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মোট বিষয়বস্তু

যা শিখবেন

S. 1. Asitler ve bazlar arasındaki farkları belirtin?
S.2. Amonyak, cam temizleyicileri gibi birçok ev ürününde bulunur. Kırmızı litmus'u maviye çevirir. Doğası nedir?
S.4. Damıtılmış su asidik/bazik/nötr müdür? Bunu nasıl doğrularsınız?
S.5. Örnek yardımıyla nötralizasyon sürecini açıklayın.

কোর্সের বিষয়বস্তু

5 বিভাগ • 5 বক্তৃতা • 00:35:28 মোট দৈর্ঘ্য

A Introduction

03:25
Q. 1. State differences between acids and bases. Q.2. Ammonia is found in many household products, such as window cleaners. It turns red litmus blue. What is its nature? Q.3. Name the source from which litmus solution is obtained. What is the use of this solution? Q.4. Is the distilled water acidic/basic/neutral? How would you verify it? Q.5 Describe the process of neutralisation with the help of an example.
  1. Mark ‘T’ if the statement is true and ‘F’ if it is false:
(i) Nitric acid turn red litmus blue. (T/F) (ii) Sodium hydroxide turns blue litmus red. (T/F) (iii) Sodium hydroxide and hydrochloric acid neutralise each other and form salt and water. (T/F) (iv) Indicator is a substance which shows different colours in acidic and basic solutions. (T/F) (v) Tooth decay is caused by the presence of a base. (T/F) Q.7.Dorji has a few bottles of soft drink in his restaurant. But, unfortunately, these are not labelled. He has to serve the drinks on the demand of customers. One customer wants acidic drink, another wants basic and third one wants neutral drink. How will Dorji decide which drink is to be served to whom? Q.8. Explain why: (a) An antacid tablet is taken when you suffer from acidity. (b) Calamine solution is applied on the skin when an ant bites. (c) Factory waste is neutralised before disposing it into the water bodies. Q. 9. Three liquids are given to you. One is hydrochloric acid, another is sodium hydroxide and third is a sugar solution. How will you identify them? You have only turmeric indicator. Q. 10. Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution? Explain. Q.11. Consider the following statements: (a) Both acids and bases change colour of all indicators. (b) If an indicator gives a colour change with an acid, it does not give a change with a base. (c) If an indicator changes colour with a base, it does not change colour with an acid. (d) Change of colour in an acid and a base depends on the type of the indicator. Which of these statements are correct? (i) All four (ii) a and d (iii) b, c and d (iv) only d

Differences between acids and bases, Nature of ammonia & distilled water, litmus

08:26

Q. 1. State differences between acids and bases.
Q.2. Ammonia is found in many household products, such as window cleaners. It turns red litmus blue. What is its nature?
Q.3. Name the source from which litmus solution is obtained.What is the use of this solution?
Q.4. Is the distilled water acidic/basic/neutral? How would you verify it?

Process of neutralisation with example and some true false questions

06:22
Q.5 Describe the process of neutralisation with the help of an example.
  1. Mark ‘T’ if the statement is true and ‘F’ if it is false:
(i) Nitric acid turn red litmus blue. (T/F) (ii) Sodium hydroxide turns blue litmus red. (T/F) (iii) Sodium hydroxide and hydrochloric acid neutralise each other and form salt and water. (T/F) (iv) Indicator is a substance which shows different colours in acidic and basic solutions. (T/F) (v) Tooth decay is caused by the presence of a base. (T/F)
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Gereksinimler: Yok

লক্ষ্য শ্রোতা

Class 7 Science

এই কোর্স সম্পর্কে

S. 1. Asitler ve bazlar arasındaki farkları belirtin.

S.2. Amonyak, cam temizleyicileri gibi birçok ev ürününde bulunur. Kırmızı litmus'u maviye çevirir. Doğası nedir?

S.3. Litmus çözeltisinin kaynağı hangisidir? Bu çözeltinin kullanımı nedir?

S.4. Damıtılmış su asidik/bazik/nötr müdür? Bunu nasıl doğrularsınız?

S.5. Örnek yardımıyla nötralizasyon sürecini açıklayın.

  • Cümle doğruysa 'G', yanlışsa 'Y' işaretleyin:
  • (i) Nitrik asit kırmızı litmus'u maviye çevirir. (G/Y)

    (ii) Sodyum hidroksit mavi litmus'u kırmızıya çevirir. (G/Y)

    (iii) Sodyum hidroksit ve hidroklorik asit birbirini nötralize eder ve tuz ve su oluşturur. (G/Y)

    (iv) Gösterge, asidik ve bazik çözeltilerde farklı renkler gösteren bir maddedir. (G/Y)

    (v) Diş çürüğü, bir bazın varlığından kaynaklanır. (G/Y)

    S.7. Dorji'nin restoranında birkaç şişe gazlı içecek var. Fakat ne yazık ki, bunlar etiketlenmemiş. Müşterilerin talebi üzerine içecekleri servis etmesi gerekiyor. Bir müşteri asidik bir içecek istiyor, diğeri bazik bir içecek ve üçüncüsü nötr bir içecek istiyor. Dorji hangi içeceğin kime verileceğine nasıl karar verecek?

    S.8. Nedenini açıklayın:

    (a) Mide ekşimesi olduğunda bir antasit tableti alınır.

    (b) Bir karınca ısırığında cilde calamine çözeltisi uygulanır.

    (c) Fabrika atıkları su kütlelerine boşaltılmadan önce nötralize edilir.

    S. 9. Size verilen üç sıvı. Biri hidroklorik asit, diğeri sodyum hidroksit ve üçüncüsü şeker çözeltisi. Bunları nasıl tanımlayacaksınız? Sadece bir zerdeçal göstergesi var.

    S. 10. Mavi litmus kağıdı bir çözeltiye daldırılır. Mavi kalır. Çözeltinin doğası nedir? Açıklayın.

    S.11. Aşağıdaki ifadeleri düşünün:

    (a) Hem asitler hem de bazlar tüm göstergelerin rengini değiştirir.

    (b) Bir gösterge bir asitle renk değiştirirse, bir bazla değiştirmez.

    (c) Bir gösterge bir bazla renk değiştirirse, bir asitle değiştirmez.

    (d) Bir asit ve bazda renk değişimi göstergenin türüne bağlıdır.

    Bu ifadelerden hangileri doğrudur?

    (i) Hepsi (ii) a ve d (iii) b, c ve d (iv) sadece d

    S.8. Nedenini açıklayın:

    (a) Mide ekşimesi olduğunda bir antasit tableti alınır.

    (b) Bir karınca ısırığında cilde calamine çözeltisi uygulanır.

    (c) Fabrika atıkları su kütlelerine boşaltılmadan önce nötralize edilir.

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    This channel is purely education based. Our aim is to ensure that the students are able to understand each and every question in an easy way. We take pride in providing quality educational services to the students of Class VII to Class XI Science NCERT, English, Computer solutions, Mathematics, Business Studies & Economics. Our goal is to help the leaders of tomorrow to learn to succeed today....

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