The temperature of a body falls from $$50^{\circ}\mathrm{C}$$$\mathrm{}$ to $$40^{\circ}\mathrm{C}$$$\mathrm{}$ in 10 minutes. If the temperature of the surroundings is $$20^{\circ}\mathrm{C}$$$\mathrm{, t}$hen the temperature of the body after another 10 minutes will be:
1. $$36.6^{\circ}\mathrm{C}$$
2. $$33.3^{\circ}\mathrm{C}$$$\mathrm{}$
3. $$35^{\circ}\mathrm{C}$$
4. $$30^{\circ}\mathrm{C}$$$\mathrm{}$

Subtopic: Â Newton's Law of Cooling |
Â 78%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A pan filled with hot food cools in 2 minutes from $$94^{\circ}\mathrm{C}$$ to $$86^{\circ}\mathrm{C}$$ when the room temperature is $$20^{\circ}\mathrm{C}$$. How long will it take to cool from $$71^{\circ}\mathrm{C}$$ to $$69^{\circ}\mathrm{C}$$?

 1 50 sec 2 52 sec 3 42 sec 4 48 sec

Subtopic: Â Newton's Law of Cooling |
Â 78%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A block of metal is heated to a temperature much higher than the room temperature and allowed to cool in a room free from air currents. Which of the following curves correctly represents the rate of cooling?

 1 2 3 4
Subtopic: Â Newton's Law of Cooling |
Â 78%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A certain quantity of water cools from $$70^{\circ}\mathrm{C}$$ to $$60^{\circ}\mathrm{C}$$ in the first 5 minutes and to $$54^{\circ}\mathrm{C}$$ in the next 5 minutes.
The temperature of the surroundings will be:

 1 $$45^{\circ}\mathrm{C}$$ 2 $$20^{\circ}\mathrm{C}$$ 3 $$42^{\circ}\mathrm{C}$$ 4 $$10^{\circ}\mathrm{C}$$
Subtopic: Â Newton's Law of Cooling |
Â 76%
From NCERT
NEET - 2014
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Hot coffee in a mug cools from $$90^{\circ}\mathrm{C}$$ to $$70^{\circ}\mathrm{C}$$ in 4.8 minutes. The room temperature is $$20^{\circ}\mathrm{C}$$. Applying Newton's law of cooling, the time needed to cool it further by $$10^{\circ}\mathrm{C}$$ should be nearly:

 1 4.2 minute 2 3.8 minute 3 3.2 minute 4 2.4 minute
Subtopic: Â Newton's Law of Cooling |
Â 69%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A body cools from a temperature of $$3T$$ to $$2T$$ in $$10$$ minutes. The room temperature is $$T$$. Assuming that Newton's law of cooling is applicable, the temperature of the body at the end of the next $$10$$ minutes will be:

 1 $$\frac{7}{4}T$$ 2 $$\frac{3}{2}T$$ 3 $$\frac{4}{3}T$$ 4 $$T$$

Subtopic: Â Newton's Law of Cooling |
Â 72%
From NCERT
NEET - 2016
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Consider two hot bodies, ${\mathrm{B}}_{1}$ and ${\mathrm{B}}_{2}$ which have temperatures of $$100^{\circ}\mathrm{C}$$$\mathrm{}$ and $$80^{\circ}\mathrm{C}$$$\mathrm{}$ respectively at t=0. The temperature of the surroundings is $$40^{\circ}\mathrm{C}$$$\mathrm{}$. The ratio of the respective rates of cooling ${\mathrm{R}}_{1}$ and ${\mathrm{R}}_{2}$ of these two bodies at t = 0 will be:
1. ${\mathrm{R}}_{1}:{\mathrm{R}}_{2}=3:2$
2. ${\mathrm{R}}_{1}:{\mathrm{R}}_{2}=5:4$
3. ${\mathrm{R}}_{1}:{\mathrm{R}}_{2}=2:3$
4. ${\mathrm{R}}_{1}:{\mathrm{R}}_{2}=4:5$

Subtopic: Â Newton's Law of Cooling |
Â 67%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A body cools down from $$80^{\circ}\mathrm{C}$$ $\mathrm{to}$ $$70^{\circ}\mathrm{C}$$ in 5 minutes. The temperature of the same body will fall from $$70^{\circ}\mathrm{C}$$$\mathrm{}$ $\mathrm{to}$ $$60^{\circ}\mathrm{C}$$$\mathrm{}$ in:

 1 less than 5 minutes. 2 equal to 5 minutes. 3 more than 5 minutes. 4 can't say anything as the temperature of the surroundings is not known.

Subtopic: Â Newton's Law of Cooling |
Â 62%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints