Tiwari Academy Discussion

Mayur Arya

Asked: December 23, 2023In: Class 10 Science

Name the part of a lens through which a ray of light passes without suffering any deviation.

Lenses refract light, converging (convex) or diverging (concave) based on shape. They produce real or virtual images, affecting magnification and focus. Commonly used in cameras, eyeglasses, and microscopes.

Mayur Arya

Asked: December 23, 2023In: Class 10 Science

The image formed by a concave mirror is observed to be real, inverted and larger than the object. Where is the object placed?

A concave mirror curves inward and reflects light. It converges parallel rays to a focal point, enabling real or virtual image formation. Used in applications like makeup mirrors and telescopes.

Mayur Arya

Asked: December 23, 2023In: Class 10 Science

Identify the products formed when 1 mL of dil. Hydrochloric acid is added to 1g of Sodium metal.

Sodium is a highly reactive alkali metal with atomic number 11. It’s silver-white, soft, and abundant in nature. It reacts vigorously with water, producing sodium hydroxide and hydrogen gas.

Mayur Arya

Asked: December 23, 2023In: Class 10 Science

Write the chemical name and chemical formula of the salt used to remove permanent hardness of water.

Water hardness is a measure of the concentration of calcium and magnesium ions. It affects soap effectiveness and can lead to scale buildup. Hard water is classified as temporary or permanent.

Mayur Arya

Asked: December 22, 2023In: Class 10 Science

A lens produces a magnification of -0.5. Is this a converging or diverging lens? If the focal length of the lens is 6 cm, draw a ray diagram showing the image formation in this case. A girl was playing with a thin beam of light from a laser torch by directing it from different directions on a convex lens held vertically. She was surprised to see that in a particular direction, the beam of light continues to move along the same direction after passing through the lens. State the reason for her observation. Draw a ray diagram to support your answer.

CBSE Science Class 10 Sample Question Paper 2023-2024 pdf free download with solutions

Prasant

Asked: December 22, 2023In: Class 10 Science

Explain the processes of aerobic respiration in mitochondria of a cell and anaerobic respiration in yeast and muscle with the help of word equations.

CBSE Science Class 10 Sample Question Paper 2023-2024 free download with answers

Prasant

Asked: December 22, 2023In: Class 10 Science

In a pea plant, the trait of flowers bearing purple colour (PP) is dominant over white colour (pp). Explain the inheritance pattern of F1 and F2 generations with the help of a cross following the rules of inheritance of traits. State the visible characters of F1and F2 progenies.

NCERT CBSE Class 10 Science Sample Question Paper 2023-2024

Prasant

Asked: December 22, 2023In: Class 10 Science

Create a terrestrial food chain depicting four trophic levels. Why do we not find food chains of more than four trophic levels in nature?

CBSE class 10 science sample question paper 2023-2024

Sandeep Jha

Asked: December 21, 2023In: Class 10 Science

In the experimental set up on “Carbon dioxide (CO2) is released during respiration”, if one forgets to keep the vial with Potassium hydroxide (KOH) in the conical flask, how will the result vary? Give details

CBSE Class 10 Science Pre Board Sample Question Paper 2023-24

Rajshree Chatterjee

Asked: December 21, 2023In: Class 10 Science

A student always sitting at the back of the bench rows in a class, who has difficulty in reading. What could name of his defect of vision? Could you draw ray diagrams to illustrate the image formation of his eyes, when he is seated at the (i) back seat and also (ii) front seat. Could you state two possible reasons of his defect of vision. Could you explain the method of correcting this defect with the help of a ray diagram, if possible.

CBSE Class 10 Science Sample Question Paper 2023-2024

Name the part of a lens through which a ray of light passes without suffering any deviation.

The image formed by a concave mirror is observed to be real, inverted and larger than the object. Where is the object placed?

Identify the products formed when 1 mL of dil. Hydrochloric acid is added to 1g of Sodium metal.

Write the chemical name and chemical formula of the salt used to remove permanent hardness of water.

Explain the processes of aerobic respiration in mitochondria of a cell and anaerobic respiration in yeast and muscle with the help of word equations.

In a pea plant, the trait of flowers bearing purple colour (PP) is dominant over white colour (pp). Explain the inheritance pattern of F1 and F2 generations with the help of a cross following the rules of inheritance of traits. State the visible characters of F1and F2 progenies.

In the experimental set up on “Carbon dioxide (CO2) is released during respiration”, if one forgets to keep the vial with Potassium hydroxide (KOH) in the conical flask, how will the result vary? Give details

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