03-07-2012, 12:15 PM
Physics &chemistry Question paper
Physics &chemistry Question paper.doc (Size: 28 KB / Downloads: 60)
I. Pick up the correct answer and fill the bracket with the capital letter of the correct answer chosen
1.The time taken by a body thrown up to reach the maximum height “h” is called its
A)time of descent B)time of flight
C)time of ascent D)none
2.The velocity of sound in air
A) V= √p/γρ B) √pρ/γ C) √γp/ρ D) none
3.The charges carried in a semi conductor are
A)electron B)holes
C)ions D)electron&holes
4.when a α-particle is emitted by an atom, its mass number decrease ( )
A)2units B) 3units
C)4units D)1unit
5.what is the equivalent resistance of two resistors 6Ω and 12 Ω when connected in series?
A)18 Ω B)12 Ω
C)6 Ω D)4 Ω
6.Among 3p,4s,3d &4p the orbital having least energy is
A)4s B)3p
C)3d D)4p
7.which of the alkaline earth metal in the following
A)potassium B)sodium
C)rubidium D)radium
8.pH value of pure water is
A)0 B)5.5
C)2 D)7
9.which is polysaccharide in the following?
A)Glucose B)fructose
C)sucrose D)starch
10.The first synthetic dye was prepared by the scientist
A)W.H.Perkin B)fleming C)Aspidin D)c.v.raman
Fill in the blanks
11. Screw gauge works on the principle of _____________
12. Time of ascent is directly proportional to____________
13. the ozone layer protects us from ___________radiations from the sun
14. The S.I. unit of magnetic moment is ____________
15. A sensitive instrument used to measure the small changes in the value of “g ”at a given location is_____________
16. The number of sub- shells present in L-shell are_____________
17. After filling the 3s-orbital,the electron enters into ______________orbital
18. Alkenes under go addition reactions because________________
19. The -CO-NH bond is called as________________
20. H2So4+Ca(OH)2 ____________+2H2O