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Mayur Arya

Asked: December 19, 2023In: Class 10 Science

What do you observe when you drop a few drops of acetic acid to a test tube containing: a) Phenolphthalein b) Universal indicator c) distilled water d) sodium hydrogen carbonate

CBSE sample question paper 2023-24 class 10 science

Subham Kumar

Asked: December 19, 2023In: Class 10 Science

“pH has a great importance in our daily life” explain by giving three examples.

CBSE class 10 science sample question paper 2023-2024

Srushti

Asked: December 18, 2023In: Class 10 Science

Why is there a need to harness non-conventional sources of energy? Give two main reasons.

NCERT CBSE class 10 science sample question paper and answer 2023-2024 free download

Rajshekhar

Asked: December 18, 2023In: Class 10 Science

An element “X” has mass number 35 and the number of neutrons, is 18. Identify the group number and period of “X”.

CBSE science Class 10 sample question paper 2023-2024 pdf free download

Rajshekhar

Asked: December 18, 2023In: Class 10 Science

A student obtained a sharp image of a lighted candle on a screen using a convex lens. Now he wants to focus a distant lamp on a far away electric pole. In which direction should the lens be moved for this purpose with respect to the screen, to get a sharp image on the screen? Justify your answer.

Class 10 CBSE science sample question paper and answer free download 2023-2024

Rajshekhar

Asked: December 18, 2023In: Class 10 Science

A concave lens has a focal length of 50 cm. Calculate its power.

CBSE Class 10 Science sample question paper 2023-2024

Prasant

Asked: December 18, 2023In: Class 10 Science

In the electrolysis of water, a) Name the gas collected at anode and cathode b) Why is the volume of gas collected at one electrode double than the other? c) What would happen if dilute H2SO4 is not added to water?

Latest CBSE class 10 science SQP sample question paper and answer 2023-2024 free download

Prasant

Asked: December 16, 2023In: Class 10 Science

The gene for red hair is recessive to the gene for black hair. What will be the hair colour of a child if he inherits a gene for red colour from his mother and a gene for black hair from his father? Express with the help of flow chart.

CBSE class 10 science sample question paper with answer 2023-2024

Prasant

Asked: December 16, 2023In: Class 10 Science

Explain the formation of rainbow in the sky with the help of a diagram. List the three phenomena of light involved. Which colour – violet or red appears at top of the rainbow? B. What is the difference in colours of the sun observed during sunrise/sunset and noon? Give explanation for each.

Latest CBSE Science Class 10 Sample Question Paper pdf download 2023-2024

Rajshekhar

Asked: December 15, 2023In: Class 10 Science

In tobacco plant, the male gametes have twenty-four chromosomes. What is the number of chromosomes in the female gamete? What is the number of chromosomes in the zygote?

CBSE Class 10 Science Sample Question Paper for Board Exam 2023-2024

1 2 3

What do you observe when you drop a few drops of acetic acid to a test tube containing: a) Phenolphthalein b) Universal indicator c) distilled water d) sodium hydrogen carbonate

“pH has a great importance in our daily life” explain by giving three examples.

Why is there a need to harness non-conventional sources of energy? Give two main reasons.

An element “X” has mass number 35 and the number of neutrons, is 18. Identify the group number and period of “X”.

A student obtained a sharp image of a lighted candle on a screen using a convex lens. Now he wants to focus a distant lamp on a far away electric pole. In which direction should the lens be moved for this purpose with respect to the screen, to get a sharp image on the screen? Justify your answer.

A concave lens has a focal length of 50 cm. Calculate its power.

In the electrolysis of water, a) Name the gas collected at anode and cathode b) Why is the volume of gas collected at one electrode double than the other? c) What would happen if dilute H2SO4 is not added to water?

The gene for red hair is recessive to the gene for black hair. What will be the hair colour of a child if he inherits a gene for red colour from his mother and a gene for black hair from his father? Express with the help of flow chart.

Explain the formation of rainbow in the sky with the help of a diagram. List the three phenomena of light involved. Which colour – violet or red appears at top of the rainbow? B. What is the difference in colours of the sun observed during sunrise/sunset and noon? Give explanation for each.

In tobacco plant, the male gametes have twenty-four chromosomes. What is the number of chromosomes in the female gamete? What is the number of chromosomes in the zygote?

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