SECTION A
25 Questions – 50 Marks
Answer ALL questions
Direction: Each question
in this section is followed by four possible choices of answers. Choose the
most correct answer.
1. Which of the following is NOT an element?
a.
Gold.
b. salt.
c.
Silver. d.
Oxygen.
2. The symbol
of mercury is
a. Hg.
b. Ag.
c. M. d. Me.
3. The colour change of turmeric indicator in
soap solution is
a. blue.
b. red.
c. pink. d.
yellow.
4. The change in which new substances are formed
and identity of the original substance is lost
a. temporary
change. b. physical change.
c. reversible change. d.
chemical change.
5. When
coin and feather are dropped from top of building at same time, the feather
takes longer time
to
reach the ground because
a. gravitational force is less on feather.
b. feather floats in air.
c. feather have less weight. d. feather have small surface area.
6. The
pH of vinegar is
a.
7 b. 14 c.
3 d. 2
7. Which
of the following is a chemical change
a. melting.
b. boiling. c. evaporation. d.
burning.
8. If
Pema weigh 30Kgf on the earth, how much will he weigh on the moon?
a. 26 Kgf. b.
36 Kgf.
c.
180 Kgf. d. 5 Kgf.
9. The
process of separating grains from its stalk is
a.
winnowing. b.
hand picking.
c.
threshing. d.
sieving.
10. Which of the following is reversible
change?
a. Dissolving of salt. b. Cooking emadatshi.
c.
Boiling of an egg. d. Ripening of mango.
11. Phurpa got study tour to visit all
Dzongkhag , in the mean time he measured his weight
in every dzongkhag that he visited. His weight will be maximum
in
a. Gelephu. b. Trongsa.
c. Haa. d. Paro.
12. If
we add salt in a glass of water and stere it with spoon it will dissolve in it.
So it is
known as
a.
solid. b. solute.
c. solvent. d. solution.
13. Kencho
weigh 45 Kgf in Sarpang, but his weight
in Thimphu is 43 Kgf. The difference in weight
is due to
a.
decrease in gravity
b. increase in gravity.
c.
food he had d. same
gravity.
14. Following process can remove the hardness
of water
a.
decantation.
b. distillation.
c. sedimentation. d. Filtration.
15. Distillation is the process of separating mixture of two miscible liquid.
The principal behind these
process is
a.
different in colour b.
different density.
c.
different boiling point d. different
16. The
best way of separating immiscible liquid is by
a.
decantation b. filtration.
c.
evaporation d.
distillation.
17. Device
that connects or breaks the electrical circuit is known as
a.
connections. b.
switch.
c.
conductors. d.
appliances.
18. All
are the characteristics of the image of object formed by plane mirror EXCEPT
a. image is erect. b.
image distance and object
distance is equal
c. image is magnified. d. image formed is lateral inversion.
19. Which
bulb will glow brighter in the circuit diagram?
bulb 1 bulb 2 bulb 3
bulb 4
S
a. bulb 1 b.
bulb 2
c. bulb
3 d.
bulb 4
20. What
type of object cast clear shadow?
a.
Transparent object. b.
Translucent object.
c. Opaque object. d. None
of them.
21. Sound
need medium to travel, but it travel fastest in
a. gas.
b.
vacuum.
c. solid. d. liquid.
22. How
many poles does a bar magnet have?
a.
1 b.
2 c.
3 d. 4
23. Which container would you prefer to use
during a march past?
1
2 3 4
a. Container 1 b.
Container 2
c.
Container 3 d. Container 4
24. Which electromagnet is stronger?
a.
Magnet with two cells and five turns of wire.
b.
Magnet with five cells and ten turns of wire.
c. Magnet with five cells and four turns of
wire.
d. Magnet
with two cells and ten turns of wire.
25. In
parallel circuit, the voltage across all electrical appliances will be
a.
different. b.
low.
c. high.
d. same.
Section
B
5
Questions – 50 Marks
Answer
ALL questions
Direction: Answer the questions given below as
directed. All answers must be written in
the answer
sheets provided by the school. The intended marks for each question is given
in brackets [
]
Question 26 ( 10 Marks )
a) State whether the following sentences are TRUE or FALSE [ 5 ]
i.
Tooth past are acidic in nature.
ii.
During a chemical change, new substance are produced.
iii.
Image in plane mirror if lateral inversion.
iv.
The particles are more closely packed in water than stone.
v.
Soluble salt present in water makes it hard.
b)
Answer the following questions:
i)
What is chemical change? Give TWO
example . [ 1.5 ]
ii)
Mention one difference between light and sound the way it travels.
[ 1.5 ]
iii)
Write TWO advantage of having parallel circuit connection at home. [ 2 ]
Question 27 ( 10 Marks )
a)
Fill in the blanks [ 5 ]
i.
The mixture of water and milk is
an example of …………………………….. liquid.
ii.
The shrillness( sharpness) of the sound is known as…………………………..
iii.
When the liquid is dense, the
object will……………………………..
iv.
…………………… water is good for formation of bones and teeth.
v.
An object which allows most of
the light to pass through it is known as………………………
b)
Answer the following questions:
i) How can you remove hardness of water at
home? [ 1 ]
ii.)
Draw and show the magnetic line of force in a bar magnet. [ 1.5 ]
iii)
Why is the symbol of gold is Au and not G or Go ? [ 1.5 ]
iv) Why is pH indicator prefer over litmus
paper? [ 1 ]
Question
28 ( 10 Marks )
a)
Match column I with column II [ 5 ]
Column
I
Column II
i.
Immiscible a. all
bulb glow with equal brightness.
ii. Baby crying b. burning of paper.
iii.
Parallel circuit c. high pitch.
iv.
Mass
d. milk and water.
v.
Chemical change e. quantity of substance.
f. gravitational pull of earth.
b)
Answer the following questions:
i.
Mention two advantage and disadvantage of hard water. [ 2 ]
ii.
What is an indicator? Give One
example. [ 1.5 ]
iii.
If the weight of Mr. Dorji on moon is 12Kgf. What could be his weight on
earth? [ 1.5 ]
Question
29 ( 10 Marks )
a) Write the correct symbol for the
following [ 2 ⅟₂ ]
i.
Magnesium ……………………….
ii.
Mercury
……………………….
iii.
Gold
…………………………
iv.
Iron
………………………..
v.
Aluminum
……………………….
b) Answer the following questions:
i.) Define; [ 2]
a. Atom
b. molecule
ii. )
Draw a neat diagram of distillation process and label the following
( Liebig condenser, wire gauge, cool water in, distilling flask,
thermometer ) [ 1+ 2 ]
iii.) How will you separate the mixture of immiscible liquid? [ 1 ]
iv.) The weight of a box of an
apple is 200Kgf at Haa. Calculate the mass of the box of an apple
if gravitational force is 10 unit.
[ 1.5 ]
Question 30
( 10 Marks)
a) Copy
and complete the table.
[ 4 ]
|
Solution
|
Colour
change in turmeric
Indicator
|
Acid or
Alkali
|
|
Soap
solution
|
|
|
|
Vinegar
|
|
|
|
Tomato
|
|
|
|
Lime
water
|
|
|
b) Answer the following questions:
i. What is weight? [ 1 ]
ii Why is water known as universal solvent? [ 1.5 ]
iii. Draw a neat diagram of electrical circuit
with two bulb connected parallel to each other.
[ 2 ]
iv. What type of water would you prefer to
drink? Why? [ 1.5 ]
Comments
Post a Comment