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Sketch and label the essential and accessory whorls of flower.
Concept: Sexual Reproduction in Plants
What is an alloy?
Concept: Corrosion of Metals
Give two examples of alloys with their chemical composition.
Concept: Corrosion of Metals
In the extraction of aluminium: Name the process of concentration of bauxite.
Concept: Basic Principles of Metallurgy > Extraction of Metals
In the extraction of aluminium Write the cathode reaction in electrolytic reduction of alumina.
Concept: Basic Principles of Metallurgy > Extraction of Metals
In the extraction of aluminium: Write the function and formula of cryolite in the extraction of aluminium.
Concept: Basic Principles of Metallurgy > Extraction of Metals
What is ‘3R’ mantra?
Concept: Sustainable Use of Resources
Write ‘3R’ mantra significance
Concept: Sustainable Use of Resources
What is recycling of waste?
Concept: Sustainable Use of Resources
Differentiate between Toilet soap and Laundry soap.
Concept: Soap
Choose the correct alternative and rewrite the following:
Acetic acid ..................
Concept: Ethanoic Acid
Find the values of k for which the quadratic equation 9x2 - 3kx + k = 0 has equal roots.
Concept: Nature of Roots of a Quadratic Equation
If -5 is a root of the quadratic equation 2x2 + px – 15 = 0 and the quadratic equation p(x2 + x)k = 0 has equal roots, find the value of k.
Concept: Nature of Roots of a Quadratic Equation
If one root of the quadratic equation is `3 – 2sqrt5` , then write another root of the equation.
Concept: Nature of Roots of a Quadratic Equation
Form the quadratic equation if its roots are –3 and 4.
Concept: Nature of Roots of a Quadratic Equation
Solve the quadratic equation 2x2 + 5x + 2 = 0 using formula method.
Concept: Method of Solving a Quadratic Equation >> Quadratic Formula (Shreedharacharya's Rule)
If a = 1, b = 8 and c = 15, then find the value of `"b"^2 - 4"ac"`
Concept: Nature of Roots of a Quadratic Equation
From the quadratic equation if the roots are 6 and 7.
Concept: Nature of Roots of a Quadratic Equation
What is the value of discriminant for the quadratic equation X2 – 2X – 3 = 0?
Concept: Nature of Roots of a Quadratic Equation
If roots of a quadratic equation 3y2 + ky + 12 = 0 are real and equal, then find the value of ‘k’.
Concept: Nature of Roots of a Quadratic Equation
