Sci 1 X boards
Q.1A) Solve the following questions.
i) When a liquid is getting converted into solid, the latent heat is __________
ii) Identify the type of following reaction :
C2 H22 011 = 120 + 11H20
__________
iii) In Dobereiner's triad containing Li, Na, K, if atomic masses of Lithium &
Potassium are 6.9 and 39.1, then what will be the atomic mass of Sodium?
iv) Considering first correlation, complete the second.
Hubble telescope : At 569 km above the earth's surface
Orbit of Hubble telescope:____________
Answers
Explanation:
1. Sublimation
2. Decomposition reaction
3. 23
4. Dont know
Answer:
Explanation:(1)
When a liquid is getting converted in to solid the latent heat is latent heat of vaporization. When any liquid is converted into solid it is cooled to the point where it turns into a solid state. It should be kept in mind that the melting or boiling points of every substance differs from each other.
(2)This reaction is oxidation reaction.
The oxidation reaction is a reaction which is typical to the loss of an electron to form a cation.
The cation is an ion which a net charge of positive value.
This is a type of reaction in which in this case the organic compound reacts with oxygen to form carbon (IV) oxide and water.
(3)According to Dobereiner's law of Triads when elements are arranged in the ascending order of their atomic masses, groups of 3 elements or triads are formed, where the atomic mass of the middle one will be an apporximate average of the other elements.
So it 6.9 + 39.1 / 2 = 23