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Mayur Arya

Asked: December 19, 2023In: Class 10 Science

What is reactivity series? How does the reactivity series of metals help in predicting the relative activities of various metals?

NCERT latest Class 10 Science sample question paper 2023-2024

Subham Kumar

Asked: December 19, 2023In: Class 10 Science

Noopur needs a lens of power -4.5D for correction of her vision. a) What kind of defect in vision is she suffering from? b) What is the focal length and nature of the corrective lens? c) Draw ray diagrams showing the (a) defected eye and (b) correction for this defect. d) What are the causes of this defect?

CBSE class 10 science sample question paper 2023-2024

Subham Kumar

Asked: December 19, 2023In: Class 10 Science

A compound which is prepared from gypsum has the property of hardening when mixed with a proper quantity of water. Identify the compound and write its chemical formula. Write the chemical equation for its preparation. Mention any one use of the compound.

NCERT, CBSE Class 10 Science sample question paper 2023-2024

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

(i) Rohit claims to have obtained an image twice the size of object with a concave lens. Is he correct? Give reason for your answer. (ii) Where should an object be placed in case of a convex lens to form an image of same size as of the object? Show with the help of ray diagram the position and the nature of the image formed. (iii) With the help of ray diagram, illustrate the change in position, nature and size of the image formed if the convex lens in case of (ii) is replaced by concave lens of same focal length.

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

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

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

Srushti

Asked: December 15, 2023In: Class 10 Science

What are the legally prescribed minimum age for marriage for females and males? Can you List four points of significance of reproductive health in a our society. Name any two areas related to reproductive health which have improved over the last past 50 years in our country.

CBSE Class 10 Science Sample Question Papers 2023-2024

Mayur Arya

Asked: December 15, 2023In: Class 10 Science

What would happen if green plants disappear from earth. How do leaves of plants help in excretion?

NCERT Class 10 science sample question paper and answer 2023-2024

Sonal Chauhan

Asked: December 14, 2023In: Class 10 Science

Why is the flow of signals in a synapse from axonal end of one neuron to dendritic end of another neuron but not the reverse?

CBSE class 10 science sample questions paper 2023-2024

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What is reactivity series? How does the reactivity series of metals help in predicting the relative activities of various metals?

A compound which is prepared from gypsum has the property of hardening when mixed with a proper quantity of water. Identify the compound and write its chemical formula. Write the chemical equation for its preparation. Mention any one use of the compound.

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

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

What are the legally prescribed minimum age for marriage for females and males? Can you List four points of significance of reproductive health in a our society. Name any two areas related to reproductive health which have improved over the last past 50 years in our country.

What would happen if green plants disappear from earth. How do leaves of plants help in excretion?

Why is the flow of signals in a synapse from axonal end of one neuron to dendritic end of another neuron but not the reverse?

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