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Which of the following is radioactive al...

Which of the following is radioactive alkali metal ?

A

Fr

B

Ra

C

At

D

Rn

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The correct Answer is:
A
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MODERN PUBLICATION-UNIT TEST - 3-MULTIPLE CHOICE QUESTIONS
  1. A metal M readily forms water soluble sulphate MSO(4), water insoluble...

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  2. The correct sequence of increasing covalent character is represented b...

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  3. A solid compound 'X' on heating gives CO(2) gas and a residue. The res...

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  4. The correct order of the mobility of alkali metal ions in aqueous solu...

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  5. Ammoniacal solution of MgSO(4) in presence of NH(4)Cl is heated with N...

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  6. The carbonate that will not decompose on heating is

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  7. The alkali metals form salts like hydrides by the direct synthesis at ...

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  8. Correct order of stability of group II A metal carbonates is

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  9. In case of alkali metals, the covalent character decreases in the orde...

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  10. Solubilities of carbonates decrease down the magnesium group due to de...

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  11. The correct order of increasing ionic character is

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  12. Which of the following is not an important constituent of cement ?

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  13. Which of the following is radioactive alkali metal ?

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  14. What is false about H(2)O(2)

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  15. In transforming 1 mole of PbS to PbSO(4) the volume of '10 volume' H(2...

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  16. Which of the following is not an example of ionic hydride ?

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  17. Hydrogen peroxide is used as an antiseptic under the name

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  18. The oxidation number of sulphur atoms in peroxomonosulphuric acid (H(2...

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  19. The reaction P(4)+3NaOH+3H(2)Oto3NaH(2)PO(2)+PH(3) is an example of

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  20. When sulphur dioxide is passed in an acidified K(2)Cr(2)O(7) solution ...

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