NEW
Font size
S
M
L
XL
WorksheetsGUWAHATI CLUSTER CLASS 10 SCIENCE SET - 1
Total questions: 15
Worksheet time: 45mins
Name
Class
Date
1.
The reaction is repeated with magnesium powder in place of magnesium ribbon under the same conditions. What will happen?
a)
Rate of reaction increase
b)
Rate of reaction become steady
c)
rate of reaction decrease
d)
no effect on the rate of reaction.
2.
A student was–performing an activity to prove the requirements for photosynthesis. During this activity, he kept two identical healthy potted plants A and B in dark for 72 hours. After 72 hours, he covered plant A and B by bell shaped jars separately. While covering the plants with separate bell jars, he kept KOH in the watch glass by the side of the plant in setup A and not in setup B. Both these setups were made air tight and were kept in light for 6 hours. Then, Iodine Test was performed with one leaf from each of the two plants A and B.Which of the following statements shows the correct results of Iodine Test performed on the leaf from plant A and B respectively?
a)
Blue - black colour would be obtained on the leaf of plant A
b)
Blue - black colour would be obtained on the leaf of plant B
c)
Red colour would be obtained on the leaf of plant A
d)
Red colour would be obtained on the leaf of plant B
3.
An object is placed at a distance of 0.25m in front of a plane mirror. The distance between the object and image will be:
a)
0.25m
b)
1.0m
c)
0.5m
d)
0.125m
4.
In which group of the organisms the food material is broken down outside the body?
a)
Mushroom, green plants, amoeba
b)
Yeast, mushroom, bread mould
c)
Paramecium, amoeba, cuscuta
d)
Cuscuta, lice, tapeworm
5.
The focal length of a plane mirror is
a)
Zero
b)
Infinite
c)
25cm
d)
-25 cm
6.
Which of the following statements about the given reaction are correct? 3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2 (i)Iron metal is getting oxidized. (ii)Water is getting reduced. (iii)Water is acting as a reducing agent. (iv)Water is acting as a oxidizing agent.
a)
(ii) and (iv)
b)
(iii) and (iv)
c)
(i), (ii) and (iii)
d)
(i), (ii) and (iv)
7.
Methane gas released from waste water treatment plants can be used as a source of fuel. Which chemical equation represents combustion of methane to produce heat energy?
a)
CH4 + CO2→ 2O2 + 2H2O
b)
CH4 + 2O2→ CO2 + 2H20
c)
2O2 + 2H2O → CO2 + CH4
d)
CO2 + 2O2→ CH4 + 2H2O
8.
Every chemical reactions follow some Laws,which of the following law is not followed by the chemical reactions ?
a)
Law of conservation of molecules
b)
Law of conservation of atoms(elements)
c)
Law of conservation of charge
d)
Law of conservation of mass
9.
Which of the following option shows the transport of oxygen to the cell correctly?
a)
Lungs →pulmonary vein →left atrium →left ventricle →aorta → body cells
b)
Lungs →pulmonary vein →right atrium →right ventricle → aorta → body cells
c)
Lungs →pulmonary artery →left atrium → left ventricle → vena cava → body cells
d)
Lungs →pulmonary artery →right atrium → right ventricle→ vena cava → body cells
10.
People living at sea level has around 5 million RBCs per cubic millimeter of their blood, whereas those living at an altitude of 5400m have around 8 million RBCs per cubic millimeter of blood. This is because, at higher altitudes:
a)
People get pollution free air to breathe and more oxygen is available.
b)
People get more nutritive food, therefore more RBCs are formed.
c)
Atmospheric oxygen level is less and hence more RBCs are needed to deliver the required amount of oxygen to tissues.
d)
There is more UV radiation which enhances the production of RBCs.
11.
The values of a, b,c and d in the balanced chemical equation: a BaCl2 + b Al2(SO4)3 →c AlCl3 + d BaSO4 are
a)
3, 2, 2, 3
b)
3, 1, 2, 3
c)
2, 4, 2, 3
d)
3, 1, 3, 2
12.
Which of the following are exothermic processes? (i) Reaction of water with Calcium Oxide (ii) Respiration in humans (iii) Sublimation of Ammonium Chloride (iv) Evaporation of water.
a)
(i) and (iv)
b)
(i) amd (ii)
c)
(ii) and (iii)
d)
(ii) and (iv)
13.
A student makes a list of some activities he observes one day. 1- Baking a cake in an oven 2- Cutting an apple pie into slices 3- Crushing the can after drinking a soda 4- Carving a wooden log to make a stand. Which activity can the student classify as a chemical change?
a)
Activity 1, as the properties of the substances in the mixture change.
b)
Activity 2, as the physical state of the apple pie changes when cut.
c)
Activity 3, as the shape of the can changes.
d)
Activity 4, as the shape and size of the wooden log changes.
14.
The radius of curveture of a concave mirror is 30 cm. The distance of image for a distant object from the pole of the mirror is:
a)
15 cm
b)
30 cm
c)
60 cm
d)
45 cm
15.
Solid Calcium Oxide reacts vigorously with water to form Calcium Hydroxide accompanied by liberation of heat. This process is called slaking of lime. Calcium Hydroxide dissolves in water to form its solution called lime water. Which among the following statement are correct about slaking of lime and the solution formed?
i. It is an endothermic reaction.
ii. It is an exothermic reaction.
iii. The pH of the resulting solution will be more than 7.
iv. The pH of the resulting solution will be less than 7.
a)
i. and ii
b)
ii and iii
c)
i and iv
d)
iii and iv
Reset
