This document is a study sheet from Gokul Academy of Science in Nagpur, India for class 12 students. It contains review questions in Biology, Chemistry, Physics, and Mathematics. In Biology, questions cover selective reabsorption and kidney stones. Chemistry questions address preparing phenol from aniline and the reaction of phenol with bromine and bromine water. Physics asks about deriving the expression for variation of gravity with altitude. Mathematics questions prove trigonometric identities.

1. GOKUL ACADEMY OF SCIENCE
15, Near Gajanan High School, New Subhedar Lay-out, Nagpur-24
Ph.No.0712-2743707 & 6466067
Date :05-01-2012 Gokul Retrospection sheet 03 Std :XII - State
( G.R.S. -03)
Biology
Q.1 Selective reabsorption: (M-02)
Q.2 Write a note on Kidney stone. (M-02)
Q.3 What are renal calculi? (M-04)
Chemistry
Q.1 How phenol is prepared from Aniline
Q.2 What is the action of the following on phenol.
i) liquid Bromine
ii) Bromine water
Physics
Q.1 Derive the expression for variation of g with altitude. ( Two - time)
Mathematics
Q.1 Prove that: tan3θ – tan2θ– tan θ= tan3 θ· tan2θ ·tanθ
Q.2 Prove that: tan100 + tan 350 + tan100 + tan350 = 1
Q.3 Prove that: tan 500 = tan400 + 2 tan100
Q.4 Without using the trigonometric table, Find
i) tan 750
ii) cos 150
iii) sin1050
Go Cool For Exam
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