1)
Why do you feel cool under a tree but not so
under a tin shed on a sunny day?
a)
The greenness of the tree gives the cool feeling.
b)
Photosynthesis absorbs heat
c)
The leaves convert water vapors into water,
which is a heat – absorbing process
d)
The leaves give out water which vaporizes absorbing
some heat as latent heat.
2)
Which among the following is the correct increasing
order of pH found in human body?
a)
Gastric juice, saliva, blood
b)
Blood, saliva, gastric juice
c)
Saliva, blood, gastric juice
d)
Gastric juice, blood, saliva
3)
Loss of forests, urbanization and increasing
pollution are all due to
a) Green
– house effect
b) Global
warming
c) Ozone
depletion
d) Population
explosion
4) Who
among the following discovered heavy water?
a)
Heinrich hertz
b)
HC Urey
c)
G Mendel
d)
Joseph Priestley
5.
Consider the following statements
1)
Caffeine, a constituent of tea and coffee is a
diuretic.
2)
Citric acid is used in soft drinks.
3)
Ascorbic acid is essential for the formation of
bones and teeth.
4)
Citric acid is a good substitution of , ascorbic
acid in our nutrition.
Which of the statements given
above is / are correct?
a)
1 and 2
b)
1, 2 and 3
c)
3 and 4
d)
1, 2, 3 and 4
6.
Consider the following statements
1)
The Richter scale is a logarithmic scale and so
an increase of 1 magnitude unit represents a factor of 10 times in amplitude
2)
Each integer reading of the Richter scale has energy
100 times that of the previous integer reading.
Which of the statements given
above is / are correct?
a)
Only 1
b)
Only 2
c)
Both 1 and 2
d)
Neither 1 nor 2
7.
Which of the following pairs is / are correctly
matched?
Inventor invention
1.
Christopher cockerel : Hovercraft
2.
David Bushnell : submarine
3.
JC Perrier
: steamship
Codes
a)
1, 2 and 3
b)
1 and 2
c)
2 and 3
d)
1 and 3
8.
Which one of the following pairs is not
correctly matched?
a)
Cosmic background explorer (COBE) : satellite
programme
b)
Falcon :
Under – sea cable system
c)
Discovery :
space shuttle
d)
Atlantis : space station
9.
Match the following.
List I (theory / law/ principle)
|
List II (scientist)
|
a. electromagnetism
|
1. Darwin
|
b. Principles
of inheritance
|
2. Faraday
|
c. Laws
of inertia
|
3. Mendel
|
d. Theory
of Natural selection
|
4. Newton
|
Codes
A B C
D
a)
1 4 3 2
b)
2 3 4 1
c)
1 3 4 2
d)
2 4 3 1
10.
In coming years, skin related disorders will
become more common due to
a)
Excessive use of detergents
b)
Water pollution
c)
Air pollution
d)
Depletion of ozone layer
Answers
1. D
2. A
3. D
4. B
5. B
6. C
7. A
8. D
9. B
10. D