Question paper for today 27 April 2021Q1 Why do we green house effect in a solar cookerQ2 Name the main constituent of Biogas Q3 What is a solenoidQ4 Define Focal length of a mirrorQ 5 What is meant by dispersion of lightQ 6 After strenuous work we get muscle cramps whyQ 7 Jasmine is reproduce d by layering Why Q8 What is the function of medullaQ 9 Why are reflex arcs present in animals Q 10 Name the waste products in plantsQ11 Draw structure of isomer of butane Q12 Three resistances of 6 ohms each are connected in parallel in a electric circuit with a cell of 12 V calculate the power Q 13 Draw electron dot structure of nitrogen Q 14 Rekha uses a lens of power +2D what is the eye defect she suffers and what is the focal length and type of lens Q15 Am element X has atomic number 9 Which group and period of periodic table Does it belong toI NEED ALL ANSWERS IF YOU KNOWN ANS THEN WIRTE THE NUMBER​