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Write down the changes that will be seen in the instance and explain the reason behind them.
Two or three filings of copper were added to 10 ml dilute nitric acid and stirred.
Concept: undefined >> undefined
Write down the changes that will be seen in the instance and explain the reason behind them.
Dilute HCl was added to the limestone.
Concept: undefined >> undefined
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Match the pairs and explain.
| ‘A’ | ‘B’ |
| 1. Growth of pollen tube towards ovule | a. Gravitropic movement |
| 2. Growth of shoot system | b. Chemotropic movement |
| 3. Growth of root system | c. Phototropic movement |
| 4. Growth towards water | d. Growth-irrelevant movement |
| e. Hydrotropic movement |
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Explain in your own words with a suitable example.
What is meant by coordination?
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Identify the odd word and explain why it is odd.
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The following statement is wrong. Rewrite it correctly by changing either one or two words.
Chlorenchyma helps the plant to float in water.
Concept: undefined >> undefined
The following statement is wrong. Rewrite it correctly by changing either one or two words.
Chloroplast is present in permanent tissue.
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Explain Mendel’s monohybrid progeny with the help of any one cross.
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Explain by giving a scientific reason.
We cannot hear the echo produced in a classroom.
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Answer the following question in your own words.
What is an echo?
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Answer the following question in your own words.
Study the construction of the Golghumat at Vijapur and discuss the reasons for the multiple echoes produced there.
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Answer the following question in your own words.
What should be the dimensions and the shape of classrooms so that no echo can be produced there?
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At least one carbon bond in an unsaturated hydrocarbon is ______.
Concept: undefined >> undefined
The element hydrogen is present in ______ organic compound.
Concept: undefined >> undefined
Draw ray diagrams for the cases of images obtained in concave mirrors as described in the table below.
| Images formed by concave mirrors | ||||
| No. | Position of the object | Position of the image | Nature of image | Size of the image |
| 1 | Between pole and focus | Behind the mirror | Erect, virtual | Magnified |
| 2 | At the focus | At infinity | Inverted, real | Very large |
| 3 | Between focus and centre of curvature | Beyond the centre of curvature | Inverted, real | Magnified |
| 4 | At the centre of curvature |
At the centre of curvature | Inverted, real | Same as the object |
| 5 | Object between infinity and Centre of curvature | Between the centre of curvature and focus | Inverted, real | Diminished |
| 6 | Object at infinity | At focus | Inverted, real | Diminished |
Concept: undefined >> undefined
Answer the following question in your own words.
What factors are important to get a distinct echo?
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Write the chemical equation for the following activity.
Dilute nitric acid was added to calcium oxide.
Concept: undefined >> undefined
Write the chemical equation for the following activity.
Dilute nitric acid was added to calcium oxide.
Concept: undefined >> undefined
Write the chemical equations for the following activities.
Dilute nitric acid was added to calcium oxide.
Concept: undefined >> undefined
Write the chemical equation for the following activity:
Dilute nitric acid was added to calcium oxide.
Concept: undefined >> undefined
