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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

Both a spherical mirror and a thin spherical lens have a focal length of (-)15 cm. What type of mirror and lens are these?

Spherical lenses and mirrors have curved surfaces. Lenses can be converging (convex) or diverging (concave), affecting light focus. Mirrors, concave or convex, influence reflection properties, used in optics for various applications.

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 23, 2023In: Class 10 Science

List any two observations when Ferrous Sulphate (FeSO₄) is heated in a dry test tube?

Ferrous sulfate is a chemical compound with the formula FeSO₄, commonly used as a supplement to treat iron deficiency anemia and in various industrial applications, including water treatment and dyeing.

Mayur Arya

Asked: December 22, 2023In: Class 10 Science

Explain the process of double circulation with the help of a flow chart.

2024 CBSE Science Class 10 Sample Question Paper pdf

Mayur Arya

Asked: December 22, 2023In: Class 10 Science

Explain the reason for the following: (i) Aluminium oxide is called an amphoteric oxide. (ii) An iron strip dipped in a blue copper sulphate solution turns the blue solution pale green. (iii) Hydrogen gas is not evolved when most metals react with nitric acid. (iv) Calcium does not occur in free state in nature. (v) Sodium or potassium metals are kept immersed under kerosene.

CBSE NCERT Science Class 10 Sample Question Paper 2023-2024

Mayur Arya

Asked: December 22, 2023In: Class 10 Science

Metal X is found in nature as its sulphide XS. It is used in the galvanisation of iron articles. Identify the metal X. How will you convert this sulphide ore into the metal? Explain with equations.

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

Kiara Singh

Asked: December 22, 2023In: Class 10 Science

Describe the role of prostate gland, seminal vesicle and testes in the human male reproductive system. How is the surgical removal of unwanted pregnancies misused? Explain the role of oral contraceptive pills in preventing conception.

2023-2024 CBSE Science Class 10 Sample Question Paper download

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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?

Both a spherical mirror and a thin spherical lens have a focal length of (-)15 cm. What type of mirror and lens are these?

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.

List any two observations when Ferrous Sulphate (FeSO₄) is heated in a dry test tube?

Explain the process of double circulation with the help of a flow chart.

Metal X is found in nature as its sulphide XS. It is used in the galvanisation of iron articles. Identify the metal X. How will you convert this sulphide ore into the metal? Explain with equations.

Describe the role of prostate gland, seminal vesicle and testes in the human male reproductive system. How is the surgical removal of unwanted pregnancies misused? Explain the role of oral contraceptive pills in preventing conception.

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