The IUPAC name of


1) 5−Oxo−4−hydroxy−2−pentanone
2) 4−Hydroxy−5−al−2−Pentanone
3) 2−Hydroxy−4−Oxopentanal
4) 1−Al−4−Oxo−2−Pentanol

Which of the following statements is wrong about the following reaction? 

1) $$\displaystyle BBr_{3}$$ plays a role similar to the H in HI by forming a complex with the ether
2) The liberated $$\displaystyle Br^{\circleddash }$$ attacks Et, displacing $$\displaystyle PhOBBr_{2},$$ which is ultimately hydrolysed to give the products.
3) The products are $$\displaystyle PhOH+EtBr+H_{3}BO_{3}.$$
4) The products are $$\displaystyle PhBr+EtOH+H_{3}BO_{3}.$$

   Which description applies to the reaction above?

          AlCl₃ + Cl^- -----> AlCl₄^-

        1) amphotorism
        2) anion hydrolysis
        3) Arrhenius neutralization
        4) Lewis acid-base reaction

 If the ratio of co-ordination no. P to that of Q be Y : Z, then the formula of the solid is-

1) P_yQ_z     2) P_zQ_y     3) P_1/yQ_1/z     4) None

Four Cl₂ molecules undergo a loss and gain of 6 mole of electrons to form two oxidation states of Cl in auto redox change. What are the +ve and −ve oxidation states of Cl in the change:

1) Cl⁵⁺,Cl^o
2) Cl⁷⁺,Cl^-
3) Cl³⁺,Cl^o
4) Cl³⁺,Cl^-

In Zeisel's method for the determination of methoxy groups, a sample of 2.68 gm of a compound (A) gave 14.08 gm of AgI. If the  molecular weight of compound (A) is 134, the number of (−OCH₃) group(s) in the compound (A) is:

1) 1
2) 2.
3) 3
4) 4

Silver reacts with hydro chloric acid to give

1) AgCl
2) H₂
3) AgH
4) no reaction

Crystals of 100% H₂?O₂? is obtained treating 90%  H₂?O₂? with:

1) solid CO₂? and ether
2) dil. H₂?SO₄?
3) quick lime
4) NaOH+CaO

One mole of an anhydrous salt AB dissolves in water with the evolution of 21.0 J/mol of heat. If the heat of hydration of AB is -29.4 J/mol then the heat of dissociation of the hydrated salt AB is

1) 50.4 J/mol
2) 8.4 J/mol
3) -54.4 J/mol
4) -8.4 J/mol

0.56g of lime (CaO) was treated with 100ml of 0.5M oxalic acid is give ppt of CaC₂O₄. The filtrate required V ml of 0.2M NaOH for complete neutralization. The value of V is: (atomic Weight of Ca=40, O=16).

1) 800ml
2) 400ml
3) 100ml
4) none