Question
‘O’ is the center of a circle and PQ is a diameter. R is a point on the circle such that PR = RQ, then the value of ∠RPQ
‘O’ is the center of a circle and PQ is a diameter. R is a point on the circle such that PR…
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Question
If A : B = 2 : 3, B : C = 5 : 8, C : D = 6 : 7, then A : D
If A : B = 2 : 3, B : C = 5 : 8, C : D = 6 : 7,…
Question
Fatima, Shreya, and Smita started a business by investing total ₹ 6,000. After a year, Fatima, Shreya, and Smita get profit shares of ₹ 50, ₹ 100, and ₹ 150 respectively. Smita invested in this business
Fatima, Shreya, and Smita started a business by investing total ₹ 6,000. After a year, Fatima, Shreya, and Smita get profit shares…
Question
At present the population of a village is P and if rate of increase of population per year be r %, after n years the population will be
At present the population of a village is P and if rate of increase of population per year be r %, after…
Question
Write down the reaction of the industrial production of Ethylene. Mention two uses of Ethylene.
Write down the reaction of the industrial production of Ethylene. Mention two uses of Ethylene. OR How is carbon tetrachloride produced by…
Question
Write the names of the chemicals used and the balanced chemical equation in the industrial production of urea.
Write the names of the chemicals used and the balanced chemical equation in the industrial production of urea.
Question
What is the purpose of Electro-plating? What electrolyte is used to plate gold on any substance?
What is the purpose of Electro-plating? What electrolyte is used to plate gold on any substance?
Question
What is meant by ionisation energy of an atom of an element? Arrange Na, Rb, Li and Cs in the increasing order of their ionisation energy.
What is meant by ionisation energy of an atom of an element? Arrange Na, Rb, Li and Cs in the increasing order…
Question
Compare the charge, penetrating power and ionising power of α and γ rays.
Compare the charge, penetrating power and ionising power of α and γ rays.
Question
Write down the difference between dynamo and electric motor. What is earthing?
Write down the difference between dynamo and electric motor. What is earthing?