In an experiment, a thermometer is placed in a test-tube of hot liquid. The temperature reading of the liquid is recorded every half minute. The table shows the results. What is the melting point of the substance?
Time/minutes $0.0$ $0.5$ $1.0$ $1.5$ $2.0$ $2.5$ $3.0$ $3.5$ $4.0$ $4.5$ $5.0$ $5.5$ $6.0$ $6.5$ $7.0$ $7.5$
Temperature/ $^{o} C$ $73$ $65$ $59$ $55$ $55$ $55$ $51$ $48$ $45$ $42$ $40$ $38$ $36$ $35$ $34$ $33$

0^{o} C

No worries! We‘ve got your back. Try BYJU‘S free classes today!

33^{o} C

No worries! We‘ve got your back. Try BYJU‘S free classes today!

55^{o} C

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

73^{o}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B $55^{o} C$
We know that at the phase changing time , the temperature of the substance is constant. So, by the exp. table it is observed that the temperature $55^{o} C$ remain constant for some time. This means that the liquid is transforming into solid.
Therefore the melting point of ice is $55^{o} C$

Suggest Corrections

Similar questions

Q. Construct a frequency distribution table for the data on the weights (in kg) of

20

students of a class using intervals

30 - 35, 35 - 40

ans so on____

40, 38, 33, 48, 60, 53, 31, 46, 34, 36, 49, 41, 55, 49, 65, 42, 44, 47, 38, 39

Question 100(i)

Construct a frequency distribution table for the following weights (in grams) of 35 mangoes, using the equal class intervals, one of them is 40-45 (45 not included):
30, 40, 45, 32, 43, 50, 55, 62, 70, 70, 61, 62, 53, 52, 50, 42, 35, 37,
53, 55, 65, 70, 73, 74, 45, 46, 58, 59, 60, 62, 74, 34, 35, 70, 68
How many classes are there in the frequency distribution table ?

Question 100(ii)

Number of RBCs/mm3 in healthy female is

Q. Following are the marks (out of 100) obtained by 50 students in statistics:

70	55	51	42	57	45	60	47	63	53
33	65	39	82	55	64	58	61	65	42
50	52	53	45	45	25	36	59	63	39
65	54	49	54	64	75	42	41	52	35
30	35	15	48	26	20	40	55	46	18

make a frequency distribution taking the first class interval as 0-10.

Join BYJU'S Learning Program

Time/minutes	$0.0$	$0.5$	$1.0$	$1.5$	$2.0$	$2.5$	$3.0$	$3.5$	$4.0$	$4.5$	$5.0$	$5.5$	$6.0$	$6.5$	$7.0$	$7.5$
Temperature/ $^{o} C$	$73$	$65$	$59$	$55$	$55$	$55$	$51$	$48$	$45$	$42$	$40$	$38$	$36$	$35$	$34$	$33$

70	55	51	42	57	45	60	47	63	53
33	65	39	82	55	64	58	61	65	42
50	52	53	45	45	25	36	59	63	39
65	54	49	54	64	75	42	41	52	35
30	35	15	48	26	20	40	55	46	18

70	55	51	42	57	45	60	47	63	53
33	65	39	82	55	64	58	61	65	42
50	52	53	45	45	25	36	59	63	39
65	54	49	54	64	75	42	41	52	35
30	35	15	48	26	20	40	55	46	18

70	55	51	42	57	45	60	47	63	53
33	65	39	82	55	64	58	61	65	42
50	52	53	45	45	25	36	59	63	39
65	54	49	54	64	75	42	41	52	35
30	35	15	48	26	20	40	55	46	18