CuSO₄ does not react with :

• Fe

• Ag

• Zn

• Mg

Assertion : Magnetic moment of Dy is the highest among the lanthanoids.

Reason : Orbital motion contributes magnetic moment.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Reason of passively of iron is :

• Fe₂O₃

• Fe₃O₄

• FeO

• Fe₂O₄ ^. 3H₂O 

Fuel used in nuclear reactor is :

• plutonium

• thorium

• radium

• deuterium

Essential component of amalgam is :

• Fe

• Pb

• Hg

• Cr

The compound used in enrichment ofuranium for nuclear power plant is

• U₃O₈

• UF₆

• UO₂(NO₃)₂

• UCl₄

What is the name of element with atomic number 105 ?

• Kurchatovium

• Dubnium

• Nobelium

• Holmium

308.

What is the general outer electronic configuration of the coinage metals ?

• ns² np⁶

• (n-1)d¹⁰ ns¹

• (n-1)d¹⁰ ns²

• (n-1)d⁹ ns²

Assertion : ${\mathrm{E}}^{°}$ for Mn³⁺/Mn²⁺ is more positive than Cr³⁺/Cr³⁺

Reason : The third ionization energy of Mn is larger than that of Cr.

• If both assertion and reason are true and reason is the correct explanation of the assertion.

• If both assertion and reason are true but reason is not the correct explanation of the assertion.

• If assertion is true, but reason is false.

• Both assertion and reason are false statements.

Assertion : K₂Cr₂O₇ is used as primary standard in volumetric analysis.

Reason : It has a good solubility in water.

• If both assertion and reason are true and reason is the correct explanation of the assertion.

• If both assertion and reason are true but reason is not the correct explanation of the assertion.

• If assertion is true, but reason is false.

• Both assertion and reason are false statements.