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Class: Class 10
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Question
What is the product of the pressure and volume of 32 g of O2 gas at STP? (0 = 16)
What is the product of the pressure and volume of 32 g of O2 gas at STP? (0 = 16)
Question
The amount of which greenhouse gas in the atmosphere increases by the burning of fossil fuel?
The amount of which greenhouse gas in the atmosphere increases by the burning of fossil fuel?
Question
A hydrocarbon in the substitution reaction with chlorine in diffused sunlight forms methyl chloride in the first step. What is the hydrocarbon ? Write balanced chemical equation for the first step of the reaction. Mention one use of the hydrocarbon.
A hydrocarbon in the substitution reaction with chlorine in diffused sunlight forms methyl chloride in the first step. What is the hydrocarbon…
Question
Write the balanced chemical equation for the reaction that occurs in the Haber process for the industrial manufacture of ammonia. Write the conditions of the process.
Write the balanced chemical equation for the reaction that occurs in the Haber process for the industrial manufacture of ammonia. Write the…
Question
Mention two classes of electrolytes. How can they be differentiated?
Mention two classes of electrolytes. How can they be differentiated?
Question
Write the contribution of Mendeleef in the creation of the ‘periodic table’.
Write the contribution of Mendeleef in the creation of the ‘periodic table’. [3] OR What is meant by the atomic radius of…
Question
There are 92 protons and 143 neutrons in the nucleus of a radioactive atom. If an α-particle is emitted from that atom how many protons and neutrons will be present in the nucleus of the new atom formed? What type of nuclear reaction is the source of energy of stars?
There are 92 protons and 143 neutrons in the nucleus of a radioactive atom. If an α-particle is emitted from that atom…
Question
Write Faraday’s laws of electromagnetic induction. Mention one advantage of using a LED lamp over an incandescent lamp.
Write Faraday’s laws of electromagnetic induction. Mention one advantage of using a LED lamp over an incandescent lamp. [2 + 1]
Question
Two metallic wires A and B of the same length are made of the same material. The radius of wire A is double the radius of wire B. What is the ratio of resistances of the two wires?
Two metallic wires A and B of the same length are made of the same material. The radius of wire A is…