RE-111 'BP'
SEE 2075 (2019)
(Compulsory Science)
New Course
(Answer all the questions.)
(Group 'A')
1.
Write short answer of the
following questions. 15x1=15
a. What is the value of acceleration due to gravity 'g' at the centre
of the earth?
b. What is atmospheric pressure?
c. Write any two examples of bio-fuel.
d. Write the relation between heat gain or loss by a body with its
surface area.
e. The magnification is less than 1. What does it mean?
f. What is acid?
g. What is an alloy?
h. What is IUPAC name of methyle alcohol?
i. Write one special property of water glass.
j. Write the name of nongranular leukocytes.
k. What is kinetochore?
l. Name any two plant hormones.
m. Write scientific name of pea.
n. What is environmental pollution?
o. What is crude oil?
(Group 'B') 13x2=26
2. A permanent magnet cannot
be used in the electric bell. Why?
3.
How do ciliary muscles focus our
eye?
4.
Write any two differences between
Archimedes principle and principle of floatation.
5.
Alcohol thermometer can measure the
temperature of an ice but cannot measure the boiling point of water. Why?
6.
What is the reactivity of non-metal
when its size increases? Why?
7.
Write the following word equation
into balanced formula equation.
Nitric acid + calcium hydroxide → calcium nitrate + water
8.
A chemical substance gives hydrogen
ion and chloride ion when dissolved in water. Similarly, another chemical
substance gives sodium ion and hydroxide ion. Write their molecular formula and
also chemical reaction between them.
9.
Name the compound having the given
structural formula. Which compound is formed when one hydrogen atom from each
carbon is replaced by -OH group and
also write its one application.
10.
Write any two differences between
adult silkworm and its larva.
11.
Walls of auricles and ventricles
are not of same thickness. Why?
12.
Write any two differences between
variation and mutation.
13.
Write any two functions of medulla
oblongata.
14.
Write any two similarities between
the Earth and Venus.
(Group 'C') 6x3=18
15.
Mass of Jupiter is 1.9x1030
kg and mass of the Sun is 2x1030 kg. Calculate
the distance between them if the gravitational force between them
is 4.3x1029 N.
16.
"The world will face energy
crisis in near future." Justify this statement.
17.
How can you prepare soap? Write
with word/formula equation.
18.
Draw well-labelled diagram of
laboratory preparation of carbon dioxide gas with balanced chemical equation.
19.
Draw a diagram of sex determination.
20.
Identify any three ways for the
management of domestic wastage.
(Group 'D') 4x4=16
21.
Observe the given figure and answer
the following questions.
i)
Which effect of current electricity
is shown in the diagram?
ii)
What is this process called?
iii)
What is the magnet so formed by
this process called?
iv)
How can we increase the strength of
magnet formed by this method? Write any two ways.
22.
Answer the following questions if atomic
number of potassium is 19.
i)
Write the electronic configuration
of it on the basis of sub-shell.
ii)
Write its group and period in
periodic table.
iii)
Write the balanced chemical
equation of chemical reaction between this element and chlorine.
iv)
Write its one importance in plant.
23.
Study the given diagram and answer
the following questions. 
i)
Name the method of vegetative
propagation.
ii)
Write a cause that vegetative
propagation is applied commercially.
iii)
Write two importance of this
propagation.
24.
Following are the findings in a
study done on the earth environment. The
temperature of respective environment is increasing. The number of
amphibians
are decreasing. Human beings are suffering from cataracts and skin
cancer. Answer the following question on the basis of above facts.
i)
What is the cause of above
findings?
ii)
What is to be done to remain safe
from above conditions?
iii)
Write one more similar harmful
effect to human health.
iv)
What happens to the environment temperature
at this condition?
The
End
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