,Chapter 01: Introduction
, ,
1. A,tentative,explanation,for,a,set,of,observations,that,can,be,tested,by,further,exp
erimentation,is,referred,to,as
A) a,hypothesis. B), a,law. C), a,theory.
D), none,of,the,above.,Ans:, A Category:, Easy
Section:, 1.2
2. A,concise,verbal,or,mathematical,statement,of,a,relationship,between,phenomena,that,is,alw
ays,the,same,under,the,same,conditions,is,referred,to,as
A) a,hypothesis. B), a,law. C), a,theory.
D), none,of,the,above.,Ans:, B Category:, Easy
Section:, 1.2
3. A,unifying,principle,that,explains,a,body,of,facts,and,relations,is,referred,to,as
A) a,hypothesis. B), a,law. C), a,theory.
D), none,of,the,above.,Ans:, C Category:, Easy
Section:, 1.2
4. Complete,the,following,sentence., A,hypothesis,is
A) a,tentative,explanation,for,a,set,of,observations,that,can,be,tested,by,further,exp
erimentation.
B) a,statement,describing,a,relationship,between,phenomena,that,is,always,the,same,un
der,the,same,conditions.
C) a,unifying,principle,that,explains,a,body,of,facts,and,relations.
D) a,model,used,to,visualize,the,invisible.,A
ns:, A Category:, Easy Section:, 1.2
5. Complete,the,following,sentence., A,scientific,law,is
A) a,tentative,explanation,for,a,set,of,observations,that,can,be,tested,by,further,exp
erimentation.
B) a,statement,describing,a,relationship,between,phenomena,that,is,always,the,same,un
der,the,same,conditions.
C) a,unifying,principle,that,explains,a,body,of,facts,and,relations.
D) a,model,used,to,visualize,the,invisible.,A
ns:, B Category:, Easy Section:, 1.2
6. Complete,the,following,sentence., A,theory,is
A) a,tentative,explanation,for,a,set,of,observations,that,can,be,tested,by,further,exp
erimentation.
B) a,statement,describing,a,relationship,between,phenomena,that,is,always,the,same,un
der,the,same,conditions.
C) a,unifying,principle,that,explains,a,body,of,facts,and,relations.
D) a,model,used,to,visualize,the,invisible.,A
ns:, C Category:, Easy Section:, 1.2
Page,1
, Chapter,01:,Introduction
7. Choose,the,response,that,includes,all,the,items,listed,below,that,are,pure,substances.
i.,orange,juice ii.,steam iii.,ocean,water iv.,oxygen v.,vegetable,soup
A), i,,iii,,v B), ii,,iv C), i,,iii,,iv D), iv,only
E), all,of,them,are,pure,Ans:, B Category:, Easy
Section:, 1.2
8. Which,of,the,following,is,an,example,of,a,physical,property?
A) corrosiveness,of,sulfuric,acid
B) toxicity,of,cyanide
C) flammability,of,gasoline
D) neutralization,of,stomach,acid,with,an,antacid
E) lead,becomes,a,liquid,when,heated,to,601 C,An
s:, E Category:, Easy Section:, 1.4
9. Which,one,of,the,following,is,an,example,of,a,physical,property?
A) dynamite,explodes D) ice,floats,on,top,of,liquid,water
B) meat,rots,if,it,is,not,refrigerated E) a,silver,platter,tarnishes
C) gasoline,burns
Ans:, D Category:, Easy Section:, 1.4
10. Which,one,of,the,following,represents,a,physical,change?
A) water,,when,heated,to,100 C,,forms,steam
B) bleach,turns,hair,yellow
C) sugar,,when,heated,,becomes,brown
D) milk,turns,sour
E) apples,,when,exposed,to,air,,turn,brown,A
ns:, A Category:, Easy Section:, 1.4
11. All,of,the,following,are,properties,of,sodium., Which,one,is,a,physical,property,of,sodi
um?
A) It,is,a,surface,turns,black,when,first,exposed,to,air.
B) It,is,a,solid,at,25 C,and,changes,to,a,liquid,when,heated,to,98 C.
C) When,placed,in,water,it,sizzles,and,a,gas,is,formed.
D) When,placed,in,contact,with,chlorine,it,forms,a,compound,that,melts,at,801 C.
E) Sodium,is,never,found,as,the,pure,metal,in,nature.,A
ns:, B Category:, Easy Section:, 1.4
12. All,of,the,following,are,properties,of,tin., Which,one,is,a,chemical,property,of,tin?
A) Tin,can,be,hammered,into,a,thin,sheet.
B) At,–40 C,a,sheet,of,tin,crumbles,to,a,gray,powder.
C) Tin,melts,at,231.9 C.
D) When,a,bar,of,tin,is,bent,,it,emits,an,audible,“cry”.
E) Tin,erodes,when,added,to,hydrochloric,acid,,and,a,clear,gas,forms.,An
s:, E Category:, Medium Section:, 1.4
Page,2
, Chapter,01:,Introduction
13. Which,one,of,the,following,represents,a,chemical,change?
A) boiling,water,to,form,steam
B) burning,a,piece,of,coal
C) heating,lead,until,it,melts
D) mixing,iron,filings,and,sand,at,room,temperature
E) breaking,glass
Ans:, B Category:, Medium Section:, 1.4
14. Which,of,the,following,does,not,represent,a,chemical,change?
A) a,freshly,cut,apple,turns,brown
B) milk,turns,sour,on,standing,at,room,temperature
C) when,cooled,to,0 C,,liquid,water,becomes,ice
D) frying,an,egg
E) fermentation,of,sugar,to,alcohol,Ans:
,C Category:, Easy Section:, 1.4
15. The,SI,prefixes,nano,and,deci,represent,,respectively:
A) 10–,9,and,10–,6. D) 109,and,10–,6.
B) 106,and,10–,3. E) 10–,9,and,10–,1.
3 –3
C) 10 ,and,10 , .
Ans:, E Category: Easy Section:, 1.7
16. The,SI,prefixes,milli,and,mega,represent,,respectively:
A) 106,and,10–,6. D) 10–,3,and,109.
B) 10–,3,and,106. E) 10–,6,and,10–,3.
3 –6
C) 10 ,and,10 , .
Ans:, B Category: Easy Section:, 1.7
17. The,SI,prefixes,kilo,and,centi,represent,,respectively:
A) 103,and,10–,2. D) 10–,6,and,102.
–1
6
B) 10 ,and,10 , . E) 102,and,10–,3.
C) 10–,3,and,10–,2.
Ans:, A Category: Easy Section: 1.7
18. A,nanometer,corresponds,to:
A) 10–,2,meters. D) 10–,9,meters.
B) 10–,3,meters. E) 10–,12,meters.
C) 10–,6,meters.
Ans:, D Category:, Easy Section:, 1.7
19. A,microliter,corresponds,to:
A) 10–,2,liters. B), 10–,3,liters. C), 10–,6,liters. D), 10–,9,liters. E), 10–
12
, ,liters.,Ans:, C Category:, Easy Section:, 1.7
Page,3
