Iodine is tested by the following reagent :

• starch

• urea

• glucose

• glycerol

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

• large

• small

• no difference

• any of these

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

Tincture iodine is

• aqueous solution of I₂

• solution of I₂ in aqueous Kl

• alcoholic solution of I₂

• aqueous solution of Kl.

The compound molecular in nature in gas phase but ionic in solid state is

• PCl₅

• ${\mathrm{CCl}}_4$

• PCl₃

• POCl₃

Which two of the following salts are used for preparing iodized salt?

(i) KIO₃, (ii) KI, (iii) I₂, (iv) HI

• (i) and (ii)

• (i) and (iii)

• (ii) and (iv)

• (iii) and (iv).

Industrial name for H₂S₂O₇ is :

• Pyrosulphuric acid

• Marshall's acid

• Oleum

• all of the above

I₂ dissolves in KI solution due to the formation of :

• KI₂ and I^-

• K⁺ , I^- and I₂

• KI₃^-

• none of these

Which of the following is anhydride of perchloric acid ?

• Cl₂O₇

• Cl₂O₅

• Cl₂O₃

• HClO