Question 21 MarkIf an object is placed at infinite distance from a concave mirror, then its image is formed on centre of curvature.Answerસ્વપ્રયત્નView full question & answer→
Question 31 MarkIn human. fertilisation takes place only when sex determination is decided.Answerસ્વપ્રયત્નView full question & answer→
Question 41 MarkThe electronic configuration of an element in modern periodic table is $2. 8. 7$. then that element is in third period.Answerસ્વપ્રયત્નView full question & answer→