Science 3. Atoms and Molecules Unit Test Papers class 9 english Medium

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Science 3. Atoms and Molecules Unit Test Papers class 9 english Medium

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Unit Test Paper

3. Atoms and Molecules ⇒ Unit test - I

Science

Timing:1Hour Unit test - I T.M:20

All questions are compulsory;

ATP EDUCATION

Unit-Test I

(Science-IX ) CH – 3,4

Timing: 1 hour M.M : 20

Instructions:

(i) All questions are compulsory.

(ii) Questions 1 to 4 carry 1 mark.

(iii) Questions 5 to 6 carry 2 marks.

(iii) Questions 7 to 10 carry 3 marks.

SECTION –A

Q1. Name two metals which atomicity is mono atomic.

दो धातुओं के नाम बताइए जिनका परमाणुकता एक परमाणुक होता है |

Q2. Calculate the formula unit masses of ZnO, Na2O, K2CO3, given atomic

masses of Zn = 65 u, Na = 23 u, K = 39 u, C = 12 u, and O = 16 u.

ZnO, Na2O, K2CO3, का ईकाई द्रव्यमान सूत्र लिखिए जब Zn = 65 u,

Na = 23 u, K = 39 u, C = 12 u, और O = 16 u का परमाणु द्रव्यमान दिया

गया है |

Q3. Name two Indian philosophers who studied about the particle of matter.

दो भारतीय दार्शनिकों का नाम बताइए जो पदार्थ के कणों के विषय में अध्यन किया |

Q4. Write the definition of two important laws of chemical combination.

रासायनिक संयोजन के दो महत्त्वपूर्ण नियमों का परिभाषा लिखिए |

SECTION –B

Q6. Which part of an atom was discovered by Rutherford

alpha – particles scattering experiment? Write the limitation of

Rutherford atomic model.

रदर फोर्ड के अल्फा-कण प्रकीर्ण प्रयोग से परमाणु के किस भाग का खोज हुआ ?

रदरफोर्ड के परमाणु मॉडल की सीमाएँ लिखिए |

SECTION –C

Q7. Give the answer of following.

(i) What is an ion?

(ii) Give an example of polyatomic ion.

(iii) Write the symbols of (a) Sodium ion (b) oxide ion.

निम्न प्रश्नों का उत्तर दीजिए |

(i) आयन क्या है ?

(ii) बहुपरमाणुक आयन का एक उदाहरण दीजिए |

(iii) (a) सोडियम आयन (b) ऑक्साइड आयन का प्रतिक चिन्ह लिखिए |

Q8. Write the Dalton’s atomic theory.

डाल्टन का परमाणु सिद्धांत लिखिए |

Q9. Write two differences between Isotopes and Isobars. Write three

applications of Isotopes.

समस्थानिक एवं समभारिक में दो अंतर लिखिए | समस्थानिकों के तीन

अनुप्रयोग लिखिए |

Q10. What is mole? Find the numbers of mole in 16 g of oxygen gas.

Write the numbers of atom in one mole of atom.

मोल क्या है ? 16 g ऑक्सीजन गैस में मोलों की संख्या ज्ञात कीजिए | किसी

तत्व के एक मोल में परमाणुओं की संख्या ज्ञात कीजिए |

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Unit Test Paper

3. Atoms and Molecules ⇒ Unit test - II

Science

Timing:1Hour Unit test - IIT.M:20

All questions are compulsory;

This page is under construction of ATP Education

There are 40000 pages, in which 200 pages per day uploaded.

Thanks You.

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Unit Test Paper

3. Atoms and Molecules ⇒ Unit test - III

Science

Timing:1Hour Unit test - IIIT.M:20

All questions are compulsory;

This page is under construction of ATP Education

There are 40000 pages, in which 200 pages per day uploaded.

Thanks You.

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