NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1257 - 1260 of 5119

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Question 1257

Question MCQ▾

3 kg of ice at - 20°C is mixed with 10 kg of water at 20°C in an insulating vessel having a negligible heat capacity. Calculate the final mass of water remaining in the container. It is given that the specific heats of water and ice are 1 kcal/kg /°C and 0.5 kcal/kg/°C while the latent heat of fusion of ice is 80 kcal/kg

Choices

Choice (4)Response

a.

12.125 kg

b.

47.5 kg

c.

6.435 kg

d.

15 kg

Edit

Question 1258

Question MCQ▾

For cooking the food, which of the following type of utensil is most suitable

Choices

Choice (4)Response

a.

Low specific heat and high conductivity

b.

High specific heat and low conductivity

c.

Low specific heat and low conductivity

d.

High specific heat and high conductivity

Edit

Question 1259

Question MCQ▾

Consider two hot bodies B1 and B2 which have temperature 100° C and 80° C respectively at t = 0. The temperature of surroundings is 40° C. The ratio of the respective rates of cooling R1 and R2 of these two bodies at t = 0 will be,

Choices

Choice (4)Response

a.

R1: R2 = 4: 5

b.

R1: R2 = 2 : 3

c.

R1: R2 = 5: 4

d.

R1: R2 = 3: 2

Edit

Question 1260

Question MCQ▾

Which of the series of hydrogen spectrum are not in the visible region?

(1) Lyman series (2) Paschen series

(3) Bracket series (4) Balmer series

Select the correct answers and mark it according to the following codes:

Choices

Choice (4)Response

a.

1 and 3 are correct

b.

1 and 2 are correct

c.

1,2 and 3 are correct

d.

2 and 4 are correct

Edit