I. MULTIPLE CHOICE QUESTIONS.
c1. To balance the following chemical equation the values of x and y should respectively be: [1]
2NaOH + XAl,03 yNaAlO, +H,0
a) 1, 4 b)2, 3
91,2 d) 2, 4
C2. AgNO3+ NaCl’ AgCl + NaNO3is an example of [1]
a) Combination reaction b) Redox reaction
c) Decomposition reaction d) Double Displacement reaction
3. A student wrote three statements about rancidity : [1]
i. When fats and oils are reduced, they become rancid.
ii. Chips manufacturers usually flush chips bags with oxygen to prevent rancidity.
ii. Rancidity is prevented by adding substances called anioxidants to food.
a) Statement (i), (ii) and (iii) b) Statement (i) and (iii) only
c) Statement (i) only d) Statement (iii) only
C4. To protect10oth decay we are advised to brush our teethregularly. The nature of the tooth paste commonly used [1]
is
1/7
, a) Neutral b)Acidic
c) Corrosive d) Basic
Setting of Plaster of Paris takes place due to [1
a) Oxidation b) Reduction
c) Dehydration d) Hydration
6
Bronze is an alloy of [1]
a) Copper, Tin and Zinc b)Copper and Zinc
c) Alunminium and Tin d) Copper and Tin
7. Food cans are coated with tin and not with [1]
zinc because:
point than that of
4) Zinc is costlier than tin,. b) Zinc has a higher mel ting
tin.
than tin.
c) Zinc is more reactive than tin. d) Zinc is less reactive
L8. The kidneys in human beings are a part of the system for
b)excretion
a) respiration
c) nutrition d) transportation
pyruvic acid is converted into lactic acid in the [1]
9. During deficiency of oxygen in tissues of human beings,
a) Golgi body b) Mitochondria
c) Chloroplast d) Cytoplasm
is released? (|
2 10. In which kind of respiration more energy
b) Photorespiration
a) Allof these
d) Anaerobic respiration
c) Aerobic respiration
[1]
P 11. Junctions of tWo neurons in called:
b) neuro muscular juncion
a)cell junction
d) synapse
) neural joint (1]
variation is called
0, 12. The branchof biology-related with heredity and
b) Geneics
a) Livinglogy
c) Evolution d) Taxonomy
that of the (11
13.
ALwhat distance from a placcd to get an image of the same size as
convex lens should an object be
objet on a screen?
a) length of the lens.
Betweenhe opical centre of the lens b) Bevond twice
the focal
its principal focus. an0
) Auhe lengh of the lens.
principalfocus of the lens d) AwiCe the foOcal
( 4 appearance of the Sun at sunTlse OT
Whhof the following lo the reddish
phenomena Contbule's sigDuficantlv
) Scatteing of light light
b) lot nternal reflection of
c1. To balance the following chemical equation the values of x and y should respectively be: [1]
2NaOH + XAl,03 yNaAlO, +H,0
a) 1, 4 b)2, 3
91,2 d) 2, 4
C2. AgNO3+ NaCl’ AgCl + NaNO3is an example of [1]
a) Combination reaction b) Redox reaction
c) Decomposition reaction d) Double Displacement reaction
3. A student wrote three statements about rancidity : [1]
i. When fats and oils are reduced, they become rancid.
ii. Chips manufacturers usually flush chips bags with oxygen to prevent rancidity.
ii. Rancidity is prevented by adding substances called anioxidants to food.
a) Statement (i), (ii) and (iii) b) Statement (i) and (iii) only
c) Statement (i) only d) Statement (iii) only
C4. To protect10oth decay we are advised to brush our teethregularly. The nature of the tooth paste commonly used [1]
is
1/7
, a) Neutral b)Acidic
c) Corrosive d) Basic
Setting of Plaster of Paris takes place due to [1
a) Oxidation b) Reduction
c) Dehydration d) Hydration
6
Bronze is an alloy of [1]
a) Copper, Tin and Zinc b)Copper and Zinc
c) Alunminium and Tin d) Copper and Tin
7. Food cans are coated with tin and not with [1]
zinc because:
point than that of
4) Zinc is costlier than tin,. b) Zinc has a higher mel ting
tin.
than tin.
c) Zinc is more reactive than tin. d) Zinc is less reactive
L8. The kidneys in human beings are a part of the system for
b)excretion
a) respiration
c) nutrition d) transportation
pyruvic acid is converted into lactic acid in the [1]
9. During deficiency of oxygen in tissues of human beings,
a) Golgi body b) Mitochondria
c) Chloroplast d) Cytoplasm
is released? (|
2 10. In which kind of respiration more energy
b) Photorespiration
a) Allof these
d) Anaerobic respiration
c) Aerobic respiration
[1]
P 11. Junctions of tWo neurons in called:
b) neuro muscular juncion
a)cell junction
d) synapse
) neural joint (1]
variation is called
0, 12. The branchof biology-related with heredity and
b) Geneics
a) Livinglogy
c) Evolution d) Taxonomy
that of the (11
13.
ALwhat distance from a placcd to get an image of the same size as
convex lens should an object be
objet on a screen?
a) length of the lens.
Betweenhe opical centre of the lens b) Bevond twice
the focal
its principal focus. an0
) Auhe lengh of the lens.
principalfocus of the lens d) AwiCe the foOcal
( 4 appearance of the Sun at sunTlse OT
Whhof the following lo the reddish
phenomena Contbule's sigDuficantlv
) Scatteing of light light
b) lot nternal reflection of
