ssc bits

Physics &chemistry
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

III. Match the following
Group-A Group-B
21.mouse [ ] A)Machine language
22.Assembler [ ] B) “0” (or) “1”
23.programme [ ] C)Out put device
24.Bit [ ] D)machine independent 25.Complier [ ] E)Input device
F)Set of Instructions
G)Translates programme from high level language to machine language


Group-A Group-B
26.Aldehyde A)CH3COCH3
27.Ether [ ] B)CH3COOC2H5
28.Amine [ ] C)CH3OH
29.Ester [ ] D)CH3COOH
30.Ketone [ ] E)CH3CHO
F)CH3OCH3
G)C3H7NH2