Time : 3 hours Max Marks:
80
SECTION 'A'
1. (A) Answer the following. (5)
(i) Fill in the blanks and rewrite the completed statements:. (2
Marks)
1.
Elements showing properties of both metals and non – metals are known as
________ (metalloids)
2. The
chemical reactions in which heat is liberated are called ________ reactions. (exothermic)
(ii) Complete the analogy. (2 Marks)
1. Glass
: Insulator ∷ Copper : __________ (Conductor)
2. CuI2 : Brown ∷ AgCl : ________ (White)
(iii) Find the odd one out: (1 Marks)
Loudspeaker,
Microphone, Electric motor, Bar Magnet.
Ans. Bar
magnet.
(B) Rewrite the following statements by selecting the
correct options: (5 Marks)
1. The
modern periodic table is based on ________
a. the
principle of octaves
b. the
atomic number of elements
c. the
atomic mass of elements
d. the
presence of traids of elements
2. The
colour of phenolphthalein indicator in a basic solution is _______
a. yellow
b. green
c. orange
d. pink
3. 1
kilowatt hour = _______
a. 4.6 ×
106 joules
b. 3.5 ×
106 joules
c. 30.6 ×
106 joules
d. 3.6 × 106 joules
4. The
apparent depth of swimming pool is ________ the real depth.
a. less
than
b.
greater than
c. equal
to
d. half
5. When
an object is placed at the centre of curvature of a concave mirror, the image
formed is _________
a. real
and magnified
b.
virtual and magnified
c. real and
of the same size as that of the object.
d.
virtual and of the same size as that of the object.
2. Attempt the following. (10 Marks)
1. Give Scientific Reason:
Non-metallic character increases across a period.
2. Give Scientific Reason: Formation of a compound is a chemical change.
4. Explain the working of electric fuse.
5. Distinguish
Between: Electric Motor V/s Electric
Generator.
3. Attempt any 5 of the following. (15 Marks)
4. How are
electrical appliances connected at home ? Why ?
5. Write the uses
of washing soda.
6. Explain the following terms
Rancidity, Endothermic Reactions,
Rancidity, Endothermic Reactions,
Q4. Attempt the following (any 1) ( 5 marks)
1. How do you calculate valency of an element from its
electronic configuration ?
Section B
5. (A) Say true or false with reason (5 Marks)
1. The
middle part of sperm possesses _______ which produce energy. (mitochondria)
2. In
_______ mode of reproduction the offsprings are with minor differences. (asexual)
3. The
organic compounds having double or triple bonds in them are termed as _______ (unsaturated
hydrocarbons)
4.The
digested food is absorbed by the _______ in the small intestine. (villi)
5.
Mercury and _______ are two metals in the liquid state at room temperature. ( gallium)
5. (B) Rewrite the following statements by selecting the correct
options: (5 Marks)
1.
_________ is an ore of aluminium.
a.
Cryolite
b. Bauxite
c.
Haematite
d.
Aluminium carbonate
2. Bronze
in an alloy of ______
a. copper and tin
b. copper
and iron
c. copper
and zinc
d. copper
and aluminium .
3. The
reaction of ethene with bromine is ________
a. a substitution reaction.
b. an
addition reaction.
c. an
elimination reaction.
d. an
oxidation reaction.
4. The
unutilized carbohydrates are stored in the form of ________ in plants.
a.
proteins
b. fats
c.
glycogen
d. starch
5. The
____ provides general basic design of the body.
a.
inheritance
b. father
c. mother
d.
evolution.
6. Attempt the following. (10 Marks)
1. What happens: When steam is passed over aluminium.
3. Draw neat and well labelled diagram of Reflex arc.
[Diagram]
5. What are the
different laws to prevent pollution?
7.
Attempt the any five following. (15 Marks)
1. Write short notes on: Narmada Bachao
Andolan
2. Distinguish between: Multiple fission and Regeneration
5. How are fats
digested in the human body?
8. Attempt the following (any 1) (5 marks.)
