Answer rhe question plz plz plz
(que1)In which medium the transmission of air is not possible?
que2) what is the speed of sound at 0 degreee c in air?
que3)Time taken to complete one vibration is called __---
que3) ___ plate is connected to the positive terminal of the battery.
que4) which wires are best for making fuse wires?
que5) what is earthing wire?
que6) Write 2 causes of short circuit.
que 4.
nh3 (g) plus hcl ---> nh4 cl(s) is an example of-------
que7
explain the following reactions using example.
1)reduction
2)displacement
8 example of metal react with water.
Answers
Answer:
Ans. 1
In vacuum, the transmission of air is not possible.
Ans. 2
331 m/s is the speed of sound at 0°c.
Ans. 3
Time taken to complete one vibration is called time period.
Ans. 4
cathode
Ans. 5
Copper, Zinc, Lead, Tin etc. are best for making fuse wires because their melting point is very low.
Ans. 6
Earthing wires are covered with green plastic. It is the system of metal which is burried inside the earth, that connects the metal casing the electric appliances with the plates of copper.
Ans. 7
The causes of short circuit are as follow :
⇒ In case of electric appliances cross the safety limit, than the wire becomes hot and plastic around the phase wire melts and short circuit happens.
⇒ In addition to it, by being so old the covering becomes so weak can also cause the short circuits.
Ans. 8
NH₃ (g) + HCL ⇒ NH₄CL (s)
It is an example of neutralization reaction.
Ans. 9
sodium ( Na ) + water ( H₂O ) = sodium hydroxide ( NaOH ) + H₂
Ans. 10
Reduction : It is the reaction in which hydrogen is added and oxygen is liberated.
H₂ + CL₂ = 2HCL
Displacement : It is the reaction in which most reactive element replaces the least reactive element.
Fe + CuSO₄ = FeSO₄ + Cu
Explanation:
Answer:
answer.3.time period
answer.8 they form oxides, i think.