मराठी

Which of the following statements is not true? - Chemistry

Advertisements
Advertisements

प्रश्न

Which of the following statements is not true?

पर्याय

  • Paramagnetic substances are weakly attracted by magnetic field.

  • Ferromagnetic substances cannot be magnetised permanently.

  • The domains in antiferromagnetic substances are oppositely oriented with respect to each other.

  • Pairing of electrons cancels their magnetic moment in the diamagnetic substances.

MCQ

उत्तर

Ferromagnetic substances cannot be magnetised permanently.

Explanation:

Ferromagnetic species are strongly attracted in the magnetic field and can be permanently magnetised.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 1: Solid States - Exercises [पृष्ठ ६]

APPEARS IN

एनसीईआरटी एक्झांप्लर Chemistry [English] Class 12
पाठ 1 Solid States
Exercises | Q I. 30. | पृष्ठ ६

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्‍न

Analysis shows that nickel oxide has the formula Ni0.98O1.00. What fractions of nickel exist as Ni2+ and Ni3+ ions?


Pyrolusite ore is _______.


Compare dia, para and ferromagnetism.


Compare the properties of soft and hard ferromagnetic materials.


Example of ferromagnetic substance is ____________.


Fe3O4 (magnetite) is an example of ___________.


Which of the following arrangements shows schematic alignment of magnetic moments of antiferromagnetic substances?


Which of the following statements are correct?

(i) Ferrimagnetic substances lose ferrimagnetism on heating and become paramagnetic.

(ii) Ferrimagnetic substances do not lose ferrimagnetism on heating and remain ferrimagnetic.

(iii) Antiferromagnetic substances have domain structures similar to ferromagnetic substances and their magnetic moments are not cancelled by each other.

(iv) In ferromagnetic substances all the domains get oriented in the direction of magnetic field and remain as such even after removing magnetic field.


Given below are two statements labelled as Assertion (A) and Reason (R).

Assertion: Magnetic moment values of actinides are lesser than the theoretically predicted values.

Reason: Actinide elements are strongly paramagnetic.

Select the most appropriate answer from the options given below:


The value of aluminium susceptibility is 2.2 × 10-5. The percentage increase in the magnetic field if space within a current carrying toroid is filled with aluminium is  `"x"/10^4`. Then the value of x is ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×