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Subham Kumar

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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

Subham Kumar

Asked: December 16, 2023In: Class 10 Science

An organic compound ‘X’ is a liquid at room temperature. It is also a very good solvent and has the molecular formula C2 H6 O. on oxidation ‘X’ gives ‘Y’ which give, break effervescence on reacting with NaHCO3. X reacts with Y in the presence of conc.H2SO4to give another compound ‘Z’ which has a pleasant smell. Identify X, Y and Z. Also write chemical equations to show the formation of Y and Z.

CBSE science class 10 sample question paper 2023-2024

Subham Kumar

Asked: December 16, 2023In: Class 10 Science

What are isomers? “Isomers of the first three members of alkane series are not possible”. Give reason to justify this statement and draw structures of two isomers of butane, C4 H10.

NCERT CBSE class 10 science sample question paper 2023-2024

Subham Kumar

Asked: December 16, 2023In: Class 10 Science

When a concave mirror is placed facing Sunlight, the Sun’s rays or sun light converge to a point 10 cm from the mirror. Now, if you place 2 cm long candles flame 20 cm away on the principal axis of the mirror, where would you specify a place a screen to obtain the image of the candle? What would see the size of a image? Draw a ray diagram to justify your answer.

CBSE Class 10 science sample question paper for board exam 2023-2024

Subham Kumar

Asked: December 16, 2023In: Class 10 Science

List two secondary sexual characters of males that are different from that of females.

CBSE Class 10 Science sample question paper 2023-2024

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