Class XII

The molecules of which gas have highest speed?
  1. CH4 at 300 K
  2. H2 at -73oC
  3. N2 at 1,027oC
  4. O2 at 0oC
The metal used to recover copper from a solution of copper sulphate is
  1. Na
  2. Ag
  3. Hg
  4. Fe
The most electronegative element among the following is
  1. sodium
  2. bromine
  3. fluorine
  4. oxygen
The number of d-electrons in Fe2+ (Z = 26) is not equal to that of
  1. p-electrons in Ne(Z = 10)
  2. s-electrons in Mg(Z = 12)
  3. d-electrons in Fe(Z = 26)
  4. p-electrons in CI(Z = 17)
The metallurgical process in which a metal is obtained in a fused state is called
  1. smelting
  2. roasting
  3. calcinations
  4. froth floatation
Time Elapsed

HR : MIN : SEC
Question Answered
0
Score out of 100
0

Get Started!

we provide the best
services to our students

AmazingCounters.com Views

 

LKG - 12th

Rs 1,999  Annual
Plan
TOP