soalan sc chap. 6 f3

8/10/2019 soalan sc chap. 6 f3

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Land and it resources

Each question is followed by four possible answers. Choose the best answer for each

question.

1. Which of the following statements is true about the effect of heat on mineral

compounds found in the Earth's crust?

A Metal sulphide will decompose into metal oxide and sulphur dioxide whenheated

B All carbonates are very stable and do not decompose by heat

C All metal oxides are not stable towards the effect of heat

D Metal will combine with oxygen to form metal sulphide when heated

2. Which of the following statements is true about silicon compounds?

I Do react with acid

II Do not dissolve in water

III Decompose when heated

A I and II only

B I and III only

C II and III only

D I II and III

3. When calcium carbonate is heated it decomposes into substanceXand gas Y!

What are substanceXand gas Y?

X Y

A "alcium chloride "arbon dioxideB "alcium sulphide #ulphur dioxide

C "alcium oxide "arbon dioxide

D "alcium nitrate "arbon dioxide

4. Which of the following is correctlymatched to the use of silicon compounds?

Silicon compound Use

A $ade "utting glass

B #ilica Ma%ing of mortar

C Asbestos &olishing furniture

D #odium silica Electrical insulator in electric irons


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question.

5.

(he e)uation above shows the reaction between magnesium and oxygen! What is

productX ?

A Magnesium chloride

B Magnesium sulphide

C Magnesium carbonate

D Magnesium oxide

6. Which of the following shows a calcium compound and its elements?

Calcium Elements

compound

A *uic%lime "alcium hydrogen

B +imestone "alcium carbon

C #la%ed lime "alcium hydrogen oxygen

D +imewater "alcium oxygen

7.

(he e)uation above shows the formation of calcium hydroxide! What isX?

A "arbon dioxide

B +imewater

C *uic%lime

D +imestone

8. Which of the following compounds are hydrocarbon compounds?

I &etroleum

II "oal

III ,atural gas

A I and II only

B I and III only

C II and III only

D I II and III

Magnesium - oxygen . X

/


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question.

9. A type of compound when heated releases a gas that turns orange acidifiedpotassium dichromate 01I2 solution to green! What is the compound?

A #ulphide

B "arbonateC 3xide

D ,itrate

10.

(he figure above shows potassium permanganate being heated until the iron filings

glow! Which of the following e)uations represents the reaction that occurs?

A Iron - sulphur . iron sulphideB Iron - oxygen . iron oxide

C Iron - oxygen . iron dioxide

D Iron - oxygen . iron carbonate

11. (he second most abundant non4metal element found in the Earth's crust is

A sulphur

B carbon

C oxygen

D silicon

5


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question.

12.

(he figure above shows the fractional distillation of petroleum that is carried out in

a laboratory! 3f the following which is the characteristic of the petroleum fractions

that vapourises first?

A Difficult to burn6 very viscous

B 1ery viscous6 produces less soot when burning

C +ess viscous6 produces less soot when burning

D 7rown in colour6 produces soot when burning

13. 8ractional distillation is used to separate hydrocarbon compounds in petroleumbecause all the hydrocarbons have

A different densities

B different boiling points

C different melting points

D different chemical energies

14.

calcium

carbonate

9


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question.

(he figure above shows calcium carbonate being heated and li)uidX is used to test thegas released from the decomposition! +i)uidXis probably

I lime water

II hydrogen bicarbonate solution

III potassium permanganate solution

A I and II only

B I and III only

C II and III only

D I II and III

15.

(he table above shows elements which form minerals contained in metal ores X YandZ! Which of the following represents the metal ores X YandZ?

X Y Z

A :alena 7auxite MarbleB ;aematite "assiterite Malachite

C 7auxite Malachite "assiterite

D Marble ;ematite :alena

16.

(he table above shows the observations for the reaction between metalsP Qand

Swith oxygen! Which of the following shows the se)uence of reactivity of thesemetals in ascending order?

Metal ore

Observato!


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question.

A QP S

B Q SP

C S QP

D SP Q

17.(he following pairs show metal ores and the metals extracted from them! Which is

correctlymatched?

!etal ore !etal

A 7auxite Iron

B ;aematite +ead

C "assiterite (in

D Malachite Aluminium

18.

(he figure above shows an experiment to study a decomposition reaction! It is

%nown that substanceXis formed from calcium carbon and oxygen! Which of thefollowing test materials can be used as substance Yto test for gas released during

the experiment?

A +imewater

B "obalt chloride

C &otassium dichromate solution

D Acidified potassium permanganate

19. Which of the following silicon compounds consist purely of silicate?

A #and flint )uart=

B "lay feldspar asbestos

C Mica clay sand

D 8eldspar flint asbestos

>


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question.

20. A student wants to confirm the type of gas released when lead sulphide is heated!

Which of the following test materials should be used and what observation should

would be recorded?

"est material #bser$ation

A &otassium manganate 01II2 solution &urple colour is bleached

B +imewater 7ecomes cloudy

C :lowing wooden splinter :lowing wooden splinter lights up

D +ighted wooden splinter &roduces a 'pop' sound

"a#er 2

(he figure above shows the effect of heat on coc%le shells!

0a2 0i2 What change can be observed in the limewater?

0ii2 Explain the change occurs in lime water in 0a20i2!

0b2 "oc%le shells contain calcium carbonate! Write a chemical e)uation in words to

represent the effect of heat on coc%le shells!

@


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question.

0c2 #tate t$reeelements found in coc%le shells!

0d2 :ive o!eexample of other natural substance which can be used to replace the

coc%le shells in this experiment!

0e2 Water is dropped onto heated coc%le shells! (he solution formed is then tested

with red litmus paper! What can be observed of the red litmus paper?


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question.

A!s%ers&

"a#er 1

A D

/ A / C

5 C 5 B

9 B 9 A

< D < B

> C > D@ C @ C

D A

B A B B

C B /C A

"a#er 2

0a2 0i2 It turns cloudy

(ii) (he carbon dioxide that is released reacts with limewater

0b2 "alcium carbonate . calcium oxide - carbon dioxide 0c2 "alcium carbon and oxygen

0d2 +imestonesnail shellmarble 0e2 It turns blue

B

soalan sc chap. 6 f3

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