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Assertion (A): Al(2)O(3) dissolves in bo...

Assertion (A): `Al_(2)O_(3)` dissolves in both `NaOH` and `HCl`
Assertion (R): Metallic oxides generally dissolve in both strong acids and strong alkalies.

A

Both (A) and (R) are true and (R) is the correct explanation of (A)

B

Both (A) and (R) are true and (R) is not the correct explanation of (A)

C

(A) is true but (R) is false

D

(A) is false but (R) is true

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NARAYNA-PERIODIC TABLE -All Questions
  1. Assertion (A): The ionic size of Mg^(2+) is larger than Al^(3+) Asse...

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  2. Assertion (A): The second electron affinity of oxygen is exothermic. ...

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  3. Assertion (A): Al(2)O(3) dissolves in both NaOH and HCl Assertion (R...

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  4. Assertion (A): Cu^(+2) paramagnatic ltbr. Assertion (R): All the orbit...

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  5. Assertion (A): Zn is not a transition element. Assertion (R): Elemen...

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  6. Assertion (A): The transition metal ions are generally paramagnetic in...

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  7. Assertion (A): Electron affinity of chlorine is greater than Fluorine ...

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  8. Assertion (A): Ionisation potential of 'N' is greater than 'O' Asser...

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  9. Assertion (A): The atomic radius of inert gases is higher than halogen...

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  10. Assertion (A): In ionisation potential Vs atomic number curve peaks ar...

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  11. Assertion (A): Chemistry of Actinoids is more complicated than Lanthan...

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  12. Assertion (A): The size decreases as Pb gt Pb^(+2) gt Pb^(+4) Assert...

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  13. Assertion (A): Ionisation potential across a period is Li lt B lt Be l...

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  14. Assertion (A): F^(-1) ion is larger in size compared of F Assertion ...

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  15. Assertion (A): Ionisation potential of K is numerically the same as el...

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  16. Statement-1: Generally, ionisation enthalpy increases from left to rig...

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  17. Assertion: Boron has a smaller first ionisation enthalpy than berylliu...

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  18. Assertion: Electron gain enthalpy always becomes less negative as we g...

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  20. Match the following The correct match is

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