Question

last previous year cbse question paper science ople send me​

Answer 1

 –   – 
Section – A
1.                      
   F1       ? 1
A Mendelian experiment consisted of breeding pea plants bearing violet flowers with
pea plants bearing white flowers. What will be the result in F1 progeny ?
2.       -   1
Write the energy conversion that takes place in a hydropower plant.
3.   ‘X’       443 K       
‘Y’     ‘X’            ‘Z’
   ‘X’, ‘Y’  ‘Z’    ‘Y’      
               2
A compound ‘X’ on heating with excess conc. sulphuric acid at 443 K gives an
unsaturated compound ‘Y’. ‘X’ also reacts with sodium metal to evolve a colourless
gas ‘Z’. Identify ‘X’, ‘Y’ and ‘Z’. Write the equation of the chemical reaction of
formation of ‘Y’ and also write the role of sulphuric acid in the reaction.
4. (a)                 2
(b)       ,          , 
      a  b    
 
a  b     
(a) Name one gustatory receptor and one olfactory receptor present in human beings.
(b) Write a and b in the given flow chart of neuron through which information
travels as an electrical impulse.
Dendrite  a  b  End point of Neuron
I have written it by myself please mark it as the brainllist if it will help you please say thanks for this answer too. . .