Section A: (40)
Que 1
A)Choose the correct : (15)
1.What are the possible compounds that
hydrogen can form with element A(2,7)
and B(2,8,8,1):
a)HA ,HB2
b)H2A ,HB
c)HA ,HB
d)H2A2,H2B2
2.Which of the following is insoluble
base :
a.NaOH
b.Ba(OH)2
,c.KOH
d.Zn(OH)2
3.The type of force between bonds of H2O2 is :
a)hydrogen bond forces
b)van der waals forces
c)electrostatic forces
d)None of the above
4.Which of the following will not produce
precipitate with sodium hydroxide :
a)Potassium permanganate
b)Copper chloride
c)calcium sulfite
d)zinc acetate
, 5.Which of the following is Not correct for alkali
metals ?
a)ceasium is more reactive than francium even
though Cs comes before Fr.
b)Their solutions are mainly soluble
c)their density decreases as one go down
d)Ionization energy is highest in potassium
6.which of the following reactions is redox:
a)2Mg + Si→ Mg2Si +∆G
b)2AgNO3 + Pb(CH3COO)2→ 2AgCH3COO +
Pb(NO3)2
C)2KBr + Cl2 → 2KCl +Br2
d)BF3 +NH3 → BF3NH3
7.Which of the following can turn pink
phenolphataline to colourless :
a)CaCl2
b)H2O