41.

Difference in the melting and boiling points of inert gases is :

• large

• small

• no difference

• any of these

Essential component of amalgam is :

• Fe

• Pb

• Hg

• Cr

Nausadar is :

• NH₁NO₃

• NH₄Cl

• (NH₄)₂SO₄

• NH₄OH

Anode in the galvanic cell is :

• negative electrode

• positive electrons

• neutral electrode

• none of the above

Normal solution is :

• inert solution

• acidic solution

• one litre containing one equivalent

• basic solution

The magnetic moment of K₃[Fe(CN)₆]  is found to be 1.7 BM .How many unpaired electron (s) is/are present per molecule ?

• 1

• 2

• 3

• 4

NaOCl is used as a bleaching agent and sterilising agent .It can be synthesized by the action of :

• NaCl with H₂O

• NH₄Cl with NaOH

• Cl₂ with cold and dilute NaOH

• Cl₂ with hot and concentrated NaOH

How can you synthesize nitric oxide in the laboratory ?

• Zinc with cold and dilute HNO₃

• Zinc with concentrated HNO₃

• Copper with cold and dilute HNO₃

• Heating NH₄NO₃

Essential compound to manufacture acrolin is :

• glycerol

• benzene

• phenol

• ammonia

Phenol on reaction with Br₂ gives :

• O - Bromo phenol

• p - Bromo phenol

• 2 , 4 , 6 tribromo phenol

• 1 , 3 , 5 tribromo benzene