Class X

The equation Cu + XHNO3 →Cu(NO3)2 + YNO2 + 2H2O, the value of X and Y are
  1. 3 and 1 respectively
  2. 8 and 6 respectively
  3. 4 and 2 respectively
  4. ) 7 and 1 respectively
When the gases sulphur dioxide and hydrogen sulphide mix in the presence of water, the reaction SO2 + 2H2S → 2H2O + 3S occurs. Here hydrogen sulphide is acting as
  1. anoxidising agent
  2. a reducing agent
  3. a dehydrating agent
  4. a catalyst
In the reaction PbO+C→Pb+CO
  1. Pbo is oxidised
  2. C act as a reduction agent
  3. C act as an oxidising agent
  4. Reaction does not represent redox reaction
Some crystals of copper sulphate were dissolved in water. The colour of the solution obtained would be
  1. red
  2. blue
  3. green
  4. brown
What is the chemical name of quick lime ?
  1. Calcium oxide
  2. Calcium carbonate
  3. Calcium hydroxide
  4. Carbon dioxide
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