Author Topic: CHEMISTRY MCQ PAPER 1 ...HELP!  (Read 2533 times)

Offline IGSTUDENT

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CHEMISTRY MCQ PAPER 1 ...HELP!
« on: June 10, 2009, 09:32:22 am »
Someone please help!

Chemistry Paper1 MCQ : May 1995 Q.29 :
Properties of Auminium alloys:
1. low density
2. Good electricity
3.High strength

Which properties are required for making an aircraft:

A. 1 ONLY
B.2 ONLY
C. 1 AND 2 ONLY
D. 1 AND D ONLY.

As per me the answer should be D but Mark schemes says  "A".

As per our text book aluminium is strong ..a property needed to make an aircraft.

Pls explain!!!

Offline aquarian93

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Re: CHEMISTRY MCQ PAPER 1 ...HELP!
« Reply #1 on: June 10, 2009, 09:33:40 am »
i think its high strength and low density

Q80BOY

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Re: CHEMISTRY MCQ PAPER 1 ...HELP!
« Reply #2 on: June 10, 2009, 09:34:14 am »
i agree with u,

i think it's answer D


Offline IGSTUDENT

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Re: CHEMISTRY MCQ PAPER 1 ...HELP!
« Reply #3 on: June 10, 2009, 09:36:04 am »
Thanks !

Offline IGSTUDENT

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Re: CHEMISTRY MCQ PAPER 1 ...HELP!
« Reply #4 on: June 10, 2009, 09:46:13 am »
MAY1995 Q35.. CAN SOMEONE PLS EXPLAIN THE DIAGRAM?ANSWER IS OK BUT THE QUESTION DIAGRAM IS CONFUSING.
CARBON DIOXIDE IS COLLECTED BY UPWARD DISPLACEMENT OF AIR (HIGHER DENSITY THAN AIR) WHEREAS THE DIAGRAM SHOWS A DOWNWARD DISPLACEMENT .

Offline MR.BooMBastiC

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Re: CHEMISTRY MCQ PAPER 1 ...HELP!
« Reply #5 on: June 10, 2009, 09:47:10 am »
hey brothers ur requested to visit this link!
https://studentforums.biz/index.php/topic,2603.30.html

Offline IGSTUDENT

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Re: CHEMISTRY MCQ PAPER 1 ...HELP!
« Reply #6 on: June 10, 2009, 03:09:18 pm »
MAY1998 PAPER 1 Q.NO.4
Can someone pls explain what shld be the answer n why;

reaction between solution P and Q is exothermic.

student is asked to test this statement by mixing equal volumes of the two solutions and measure temperature change.
Which two pieces of apparatus would be needed/

clock and thermometer

burette and thermometer


As per mark schem it is clock and thermo.

I feel it shld be burette to measure equal volumes of solution.

Offline esso

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Re: CHEMISTRY MCQ PAPER 1 ...HELP!
« Reply #7 on: June 10, 2009, 03:13:50 pm »
MAY1998 PAPER 1 Q.NO.4
Can someone pls explain what shld be the answer n why;

reaction between solution P and Q is exothermic.

student is asked to test this statement by mixing equal volumes of the two solutions and measure temperature change.
Which two pieces of apparatus would be needed/

clock and thermometer

burette and thermometer


cant be how come ?????


As per mark schem it is clock and thermo.

I feel it shld be burette to measure equal volumes of solution.

Offline IGSTUDENT

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Re: CHEMISTRY MCQ PAPER 1 ...HELP!
« Reply #8 on: June 10, 2009, 03:17:14 pm »
MAY1998 PAPER 1 Q.NO.4
Can someone pls explain what shld be the answer n why;

reaction between solution P and Q is exothermic.

student is asked to test this statement by mixing equal volumes of the two solutions and measure temperature change.
Which two pieces of apparatus would be needed/

clock and thermometer

burette and thermometer


cant be how come ?????


As per mark schem it is clock and thermo.

I feel it shld be burette to measure equal volumes of solution.

Esso

What shld the answer be?

Offline esso

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Re: CHEMISTRY MCQ PAPER 1 ...HELP!
« Reply #9 on: June 10, 2009, 03:28:05 pm »
sorry got confused...
its c as u said....
cause there is no need for a clock....

Offline IGSTUDENT

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Re: CHEMISTRY MCQ PAPER 1 ...HELP!
« Reply #10 on: June 10, 2009, 03:32:43 pm »
November 1998 Q15.

Can someone pls explain

nid404

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Re: CHEMISTRY MCQ PAPER 1 ...HELP!
« Reply #11 on: June 10, 2009, 03:34:44 pm »
November 1998 Q15.

Can someone pls explain

I don't have the paper..can u put the paper up plz

Offline Ghost Of Highbury

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Re: CHEMISTRY MCQ PAPER 1 ...HELP!
« Reply #12 on: June 10, 2009, 03:42:26 pm »
or post the question here..
divine intervention!

Offline IGSTUDENT

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Re: CHEMISTRY MCQ PAPER 1 ...HELP!
« Reply #13 on: June 10, 2009, 03:48:32 pm »
A chemical reaction between pieces of a solid and an acid is very fast
Which changes would make the reaction slower?

   pieces of solid             acid
A smaller                      less concentrated
B smaller                      more concentrated
C larger                        less concentrated
D larger                        more concentrated

Offline Ghost Of Highbury

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Re: CHEMISTRY MCQ PAPER 1 ...HELP!
« Reply #14 on: June 10, 2009, 03:49:40 pm »
C..

larger surface area and less concentration of the acid would decrease the rate of recation
divine intervention!