How can you differentiate between evaporation and

Question

1Q.      How can you differentiate between evaporation and condensation with suitable examples ( AS₁-)2Q.            Rahul did an experiment for a Relation between Rise in temperature and nature of material. Write experiment (A₃)   (practice Max - pg # 9 Activity 5) or T.B -010 Pg # 5)

3Q.      Given specific heats of various substances AS₄

Substances	Specific Heat
	In Cal / G -c0	In J/Kg - k
Lead	0.031	130
Mercury	0.033	139
Brass	0.092	380
Zinc	0.093	391
Copper	0.095	399
Iran	0.115	483
Glass (Hint	0.12	504
Aluminum	0.21	882
Kerosene	0.50	2100
Ice	0.50	2100
Water	1	4180
Sea water	0.95	3900

Answer following Questions.

a)      Write the specific heat of liquid metal in J/Kg-k

b)      Write the specific heat of Alloy (mixing metal) in Cal/g-c⁰

c)      Write the specific heat of liquid fuel in J/kg-k

d)      Write the specific heat of metal which causes Rust cal */ g⁰c

e)      Indentify which two substances have same specific heats

f)       Write the specific heat of soldering iron metal  

g)      Write he specific heat of Transparent material

h)      Write the specific heat difference between water and sea water in Cal/Gc⁰

4Q.      Explain phase changing of given Diagram

 

Short Answers Questions - 2 Marks each
5Q: What would be the final emperature of a mixture of 60g of water at 300 c emperature and 100g of water at 500 c temperature AS1)
(TB - Q No 1 pg no 17)
( Resource max page 7)
6Q: Rahul asked some questions to Rohit on explaining the difference between boiling point and evaporation. Write two questions what he asked ( AS2 - Resource max - page 17 tb page 10, 14)
i). Which among boiling and evaporation is a continuous process?
ii). Which among boiling point and evaporation will have sharp temperature value to notice the change?

7Q: How do you perform if Teachers provided following and asked you to do an activity take two thermometers, Beaker, a lid with two holes, hot water and coconut oil . What will beis the conclusion of experiment?
a. What are the precautions taken duringof experiment? (AS3- Practice Max - page 5, Acitivity 4)
8Q: Sangeetha collected humidity information from different places 1. AT sea beach side area. 2. Hill side areas 3. Platue areas 4. Cold places write the information what she colected (AS4 -
i). What will be the rain fall at that particular place?
ii). How is the wind speed at that particular place?
iii). What will be highest temperature of that particular place?
iv). What will be lowest temperature of that particular place

9Q: How will differentiate cold water from hot water? Explain it through diagram.

AS-5

10Q: How do you appreciate the role of the higher specific heat of water in stabilizing atmospheric temperature during winter and summer seasons ( AS6 – Resouce max pg 10)

ôVery short Questions – 1 Marks each

11Q:    How do you convert temperature from Centigrade scale to Kelvin scale and levis scale?

Convert  48⁰ c into kelvins temperature; and -48⁰ c into levis temparature ( AS1 – TB page 3

12Q:  Write the difference between Dew and Fog.  (AS1- TB pge13)

13Q:    How the old people predict the Rain in villages ? ( AS TB pg 13)

14Q:    You might have observed coconut oil and ghee getting converted from liquid state to solid state when kept in refrigerator. What co8uld be the reason for this change?  ( AS3-TB-pge 16)

 

15Q: Latent heat of fusion L=Q/m.  the latent head of fusion of ice is 80 cal / gm. How much energy  is released or absorbed when 3 gm , ggm and 5 gm of water at 0⁰ freezes to ice at 0⁰c write answer in tabular form ( As4 -  Resource – Max page 18, 0.2)

S No	Weight	Q = ml cal
1	1 gr
2	2gr
3	3gr
4	4gr

 

 

16Q: What are noticeable changes in following set of images on comparison?  

17Q: Why do we sweat while doing work? ( AS6- TB pg 12)

18Q: If a person one is not feeling change under hot or cold in his surroundings, then his body is said to be in ____________________. ( AS1 practice max page 8 q 3)

19Q: 10 grams of water, raises its temparaturetemperature from 100 c to 400c _______________ cal is quantity of head required. Specdific heat of water is 1 cal/gi (AS1 - practice max page 10)

20Q : Take few drops of spirit on your palm using a dropper then skin will be come ___________________. (AS 3, Practice max page no 15)

21Q : Write the statement for given figure both are equal size Beakers are connected by pipe equal volume of water

 

(AS4 - Communicaiton through picutre - models )
Heat is flowing from hot body to cold.
22Q: Two beakers are connected by b pipe at bottom. Both are equal in size Beakers having Ice and water . I predict above activity. (AS 2 -
? m.c.q - ½ Marks each
23Q: Boiling point of water at normal atmospheric pressure is _______ (AS1 - Resource Max
a) 00C B) 1000C C) 1100C D) -50C
24Q. Latent heatd of condensation ofor steam is _________________
a) 340 CAL/GM B) 240 CAL/GM C) 540 CAL/GM D) NONE