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Q21
What is binary fission in organisms? With the help of suitable diagrams, describe the mode of reproduction in Amoeba.

Free Response Question Hard View solution

Q22
Explain isomerism. State any four characteristics of isomers. Draw the structures of possible isomers of butane, C4H10.

Free Response Question Hard View solution

Q23
(a)State two properties of carbon which lead to a very large number of carbon compounds.
(b)Why does micelle formation take place when soap is added to water? Why are micelles not formed when soap is added to ethanol?

Free Response Question Hard View solution

Q24
(a)What is meant by ‘power of a lens’?
(b)State and define the S.I. unit of power of a lens.
(c)A convex lens of focal length 25 cm and a concave lens of focal length 10 cm are placed in close contact with each other. Calculate the lens power of this combination.

Free Response Question View solution

Q25
(a) Draw a ray diagram to show the formation of image of an object placed between
infinity and the optical centre of a concave lens.
(b) A concave lens of focal length 15 cm forms an image 10 cm from the lens. Calculate
1-the distance of the object from the lens
2-the magnification for the image formed
3-the nature of the image formed

Free Response Question View solution

Q26
Different paths of ray are shown in the following figures. Which of the following is

Single Choice Question Easy View solution

Q27
In these diagrams, the angle of refraction r is correctly marked in which diagram?

Single Choice Question Easy View solution

Q28
To find the focal length of a concave mirror, sita should choose which one of the following set-ups?

Single Choice Question Easy View solution

Q29
Iron nails were dipped in an aqueous solution of copper sulphate. After about 30 minutes, it was observed that the colour of the solution changed from

Single Choice Question Medium View solution

Q30
Vapours of acetic acid smell

Single Choice Question Easy View solution

Class 6	Science Mathematics Social Science	English Hindi Computer
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Class 5	EVS
College Entrance	Jamia Millia Islamia Aligarh Muslim University Banaras Hindu University

2011

Q21
What is binary fission in organisms? With the help of suitable diagrams, describe the mode of reproduction in Amoeba.

Solution

Q22
Explain isomerism. State any four characteristics of isomers. Draw the structures of possible isomers of butane, C4H10.

Solution

Q23
(a)State two properties of carbon which lead to a very large number of carbon compounds.
(b)Why does micelle formation take place when soap is added to water? Why are micelles not formed when soap is added to ethanol?

Solution

Q24
(a)What is meant by ‘power of a lens’?
(b)State and define the S.I. unit of power of a lens.
(c)A convex lens of focal length 25 cm and a concave lens of focal length 10 cm are placed in close contact with each other. Calculate the lens power of this combination.

Solution

Solution

Q26
Different paths of ray are shown in the following figures. Which of the following is

Solution

Q27
In these diagrams, the angle of refraction r is correctly marked in which diagram?

Solution

Q28
To find the focal length of a concave mirror, sita should choose which one of the following set-ups?

Solution

Q29
Iron nails were dipped in an aqueous solution of copper sulphate. After about 30 minutes, it was observed that the colour of the solution changed from

Solution

Q30
Vapours of acetic acid smell

Solution

Subjects

2011

Q21 What is binary fission in organisms? With the help of suitable diagrams, describe the mode of reproduction in Amoeba.

Solution

Q22 Explain isomerism. State any four characteristics of isomers. Draw the structures of possible isomers of butane, C4H10.

Solution

Q23 (a)State two properties of carbon which lead to a very large number of carbon compounds. (b)Why does micelle formation take place when soap is added to water? Why are micelles not formed when soap is added to ethanol?

Solution

Q24 (a)What is meant by ‘power of a lens’? (b)State and define the S.I. unit of power of a lens. (c)A convex lens of focal length 25 cm and a concave lens of focal length 10 cm are placed in close contact with each other. Calculate the lens power of this combination.

Solution

Solution

Q26 Different paths of ray are shown in the following figures. Which of the following is

Solution

Q27 In these diagrams, the angle of refraction r is correctly marked in which diagram?

Solution

Q28 To find the focal length of a concave mirror, sita should choose which one of the following set-ups?

Solution

Q29 Iron nails were dipped in an aqueous solution of copper sulphate. After about 30 minutes, it was observed that the colour of the solution changed from

Solution

Q30 Vapours of acetic acid smell

Solution

Subjects

Q21
What is binary fission in organisms? With the help of suitable diagrams, describe the mode of reproduction in Amoeba.

Q22
Explain isomerism. State any four characteristics of isomers. Draw the structures of possible isomers of butane, C4H10.

Q23
(a)State two properties of carbon which lead to a very large number of carbon compounds.
(b)Why does micelle formation take place when soap is added to water? Why are micelles not formed when soap is added to ethanol?

Q24
(a)What is meant by ‘power of a lens’?
(b)State and define the S.I. unit of power of a lens.
(c)A convex lens of focal length 25 cm and a concave lens of focal length 10 cm are placed in close contact with each other. Calculate the lens power of this combination.

Q26
Different paths of ray are shown in the following figures. Which of the following is

Q27
In these diagrams, the angle of refraction r is correctly marked in which diagram?

Q28
To find the focal length of a concave mirror, sita should choose which one of the following set-ups?

Q29
Iron nails were dipped in an aqueous solution of copper sulphate. After about 30 minutes, it was observed that the colour of the solution changed from

Q30
Vapours of acetic acid smell