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question_answer1)
Refer to the given pictures. Here X can be _____.
A)
Iron done
clear
B)
Steel done
clear
C)
Thermocol done
clear
D)
Cardboard done
clear
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question_answer2)
_____ should be used to make a cooking pot and _____ can be used to make its handle.
A)
Glass, Plastic done
clear
B)
Rubber, Wood done
clear
C)
Aluminium, Wood done
clear
D)
Iron, Silver done
clear
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question_answer3)
Select the correct option regarding properties of solid, liquid and gas.
A)
B)
C)
D)
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question_answer4)
A liquid can be changed into a solid by the process of _____.
A)
Condensation done
clear
B)
Evaporation done
clear
C)
Freezing done
clear
D)
Melting done
clear
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question_answer5)
Generally, a solid first changes into a liquid and then into a gas on heating but some solids directly change into gas. This process is called _____.
A)
Evaporation done
clear
B)
Condensation done
clear
C)
Sublimation done
clear
D)
Precipitation done
clear
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question_answer6)
Which of the following statements is incorrect?
A)
Linen is obtained from plants and absorbs well. done
clear
B)
Plastic conducts electricity very well. done
clear
C)
Evaporation is faster when the surface area is larger. done
clear
D)
Copper vessels lose their shine over time due to action of air and moisture on them. done
clear
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question_answer7)
Select the activity that is an example of physical change.
A)
Melting of ice-cream done
clear
B)
Rusting of iron nails done
clear
C)
Making curd from milk done
clear
D)
All of these done
clear
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question_answer8)
Five objects a, b, c, d and e, of the same volume but different masses, are put into a tank of water as shown here.
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Which of the following is most likely to be the mass of object d?
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A)
35 g done
clear
B)
48 g done
clear
C)
64 g done
clear
D)
80 g done
clear
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question_answer9)
Study the given diagram carefully and select the correct option.
A)
X - Solid, Y - Liquid, R - Heating done
clear
B)
Y - Gas, Z - Liquid, T ? Heating done
clear
C)
X - Solid, Z - Gas, P ? Freezing done
clear
D)
Y - Gas, X - Liquid, Q ? Cooling done
clear
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question_answer10)
The diagram below shows a pump connected to a glass jar. The volume of the glass jar is \[400\text{ }c{{m}^{3}}\]and it is filled with air. When the piston is pushed in completely,\[50\text{ }c{{m}^{3}}\]of air is forced into the Jar.
What is the final volume of air in the jar?
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A)
\[50\text{ }c{{m}^{3}}\] done
clear
B)
\[~100\,c{{m}^{3}}\] done
clear
C)
\[400\text{ }c{{m}^{3}}\] done
clear
D)
\[~450\text{ }c{{m}^{3}}\] done
clear
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question_answer11)
Amol has three objects, X, Y and Z. He puts X into a measuring cylinder with 30 mL of water. Then he puts Y and Z one by one into the same measuring cylinder as shown
Which of the objects has/have a volume less than 30 mL?
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A)
X only done
clear
B)
Y only done
clear
C)
X and Y only done
clear
D)
X, Y and Z done
clear
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question_answer12)
In the given options, a boy is looking through a material. Which one of the following represents a translucent material?
A)
B)
C)
D)
None of these done
clear
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question_answer13)
Study the given table.
Material |
Waterproof |
Conducts electricity |
Elastic |
P |
√ |
x |
√ |
Q |
√ |
√ |
x |
R |
√ |
√ |
√ |
Select the option that correctly identifies any two of them.
A)
P - Rubber, R - Wood done
clear
B)
Q - Copper, R - Plastic done
clear
C)
P - Rubber, Q - Iron done
clear
D)
Q - Wood, R - glass done
clear
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question_answer14)
Select the option that correctly gives the examples of physical and chemical changes.
A)
B)
C)
D)
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question_answer15)
Which of the following would you use to join X and Y in the circuit below so that the bulb lights up?
A)
An aluminium rod done
clear
B)
A plastic spoon done
clear
C)
A woollen string done
clear
D)
An eraser done
clear
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question_answer16)
Study the flow chart given below.
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What can be placed at P, Q, R and S?
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A)
B)
C)
D)
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question_answer17)
Tanmay heated a bimetallic strip made up of metal X and metal Y. After a few minutes, he observed that it curled as shown. What can be concluded from this experiment?
A)
Metal X expands more than metal Y. done
clear
B)
Metal Y expands more than metal X. done
clear
C)
Metal X expands and metal Y contracts. done
clear
D)
Metal Y expands and metal X contracts. done
clear
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question_answer18)
Vijay performed an experiment to compare the heat conductivity of four different materials P, Q, R and S. Thumbtacks were fixed with wax on each material and then the materials were fixed to a trough containing hot water as shown in the diagram.
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Vijay tabulated his results as shown here.
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Material |
Time taken for thumbtacks to drop (minutes) |
P |
5 |
Q |
6 |
R |
2 |
S |
4 |
What can be inferred from his experiment?
A)
Material R is a better conductor of heat than material S. done
clear
B)
Material S is a better conductor of heat than material R. done
clear
C)
Material Q is a better conductor of heat than material P. done
clear
D)
Materials P, Q, R and S are equally good conductors of heat. done
clear
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question_answer19)
Some iron nails were stored in containers for a few weeks as shown in the diagram below.
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Only the nails in bottle X rusted. What will be a suitable conclusion for the given experiment?
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A)
Rusting requires water only. done
clear
B)
Rusting requires air only. done
clear
C)
Rusting requires both water and air. done
clear
D)
Rusting requires neither air nor water. done
clear
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question_answer20)
Two substances, P and Q, were used to fill a syringe. The plunger was then pushed in as shown in the diagram.
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Which of the following would most likely be P and Q?
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A)
B)
C)
D)
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