Question

Q13. Assertion: Plaster of Paris should be stored in moisture proof containers.

Reason : Plaster of Paris on coming in contact of moisture, absorbs water and reacts chemically to

form hydrated calcium sulphate, which sets to form a hard mass. [1]

Q14. Assertion Covalent compounds are generally good conductor of electricity.

Reason: Covalent compounds have cations and anions which can migrate to the opposite poles of

an electrolytic cell.

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Answer 1

Answer:

If alpha, beta are real and alpha^2, - beta^2 are the roots of a^2 x^2 + x + 1 - a^2 = 0; (a > 1) , then beta^2 =

Top answer · 4 votes

alpha^2, - beta^2 are the roots of a^2x^2 + x + 1 - a^2 = 0 alpha^2 - beta^2 = - 1/a^2, And alpha^2 ( - beta^2) = 1 - a^2a^2 (alpha^2 + beta^2)^2 = (alpha^2 ... More