Physics questions with answers

2,629 multiple-choice questions. Open any question for its answer and explanation.

Questions asked in State PSC and UPSC prelims, by topic. Each topic also has notes to read.

Read the notes: Physical Properties of Materials →

1. A form of matter has no fixed shape but it has a fixed volume. An example of this form of matter isAsked in BPSC Prelims Exam 68th
2. If two miscible liquids of same volume but different densities P1 and P2 are mixed, then the density of the mixture is given byAsked in UPSC CAPF 2024 · UPSC CDS 2 2018
3. When water is heated from 0°C to 4°C, its densityAsked in UPSC CDS 2 2022
4. Which one of the following is the correct sequence of substances having densities in decreasing order?Asked in UPSC Geoscientist 2020
5. Which one of the following has the least density at room temperature?Asked in UPSC Geoscientist 2022
6. Institute of Nano Science and Technology is located inAsked in GPSC Prelims CSP 2 2017
7. A hollow iron pipe is 21 cm long with external diameter 8 cm. If iron weighs 8 gm/cm³ and weight of the pipe is 3.696 kg, then what is its internal radius?Asked in GPSC Prelims CSP 1 2023
8. A cube is taken and all its six faces are painted. Then, the cube is cut by six planes so as to yield the maximum number of smaller cubes. If 3.5 litres of paint was consumed to paint the original cube, find the additional amount of paint needed to paint all the unpainted faces of all the smaller cubes.Asked in KPSC KAS Prelims 2014
9. Consider the following metals : (a) Platinum (b) Gold (c) Copper (d) Lead Their correct arrangement in the increasing order of density is :Asked in MPSC CS Prelims 2013
10. If density of water is 1000 kgm⁻³ and density of copper is 8.9 × 10³ kgm⁻³. What is relative density of copper ?Asked in MPSC CS Prelims 2021
11. Density of water isAsked in UPSC NDA 1 2016
12. Matter around us can exist in three different states, namely, solid, liquid and gas. The correct order of their compressibility isAsked in UPSC NDA 1 2016
13. Which one of the following regarding density of water at atmospheric pressure is correct ?Asked in UPSC NDA 1 2021
14. A spherical shell of outer radius R and inner radius R/2 contains a solid sphere of radius R/2 (see figure). The density of the material of the solid sphere is ρ and that of the shell is ρ/2. What is the average mass density of the larger sphere thus formed?Asked in UPSC NDA 1 2024
15. Which one among the following statements with reference to the properties of water is not correct ?Asked in UPSC NDA 1 2024
16. Two substances of densities $\rho_1$ and $ \rho_2$ are mixed in equal volume and their relative density is 4. When they are mixed in equal masses, relative density is 3. The values of $ \rho_1$ and $\rho_2$ respectively areAsked in UPSC NDA 2 2019
17. An object is made of two equal parts by volume; one part has density $\rho_0$ and the other part has density $2\rho_0$. What is the average density of the object?Asked in UPSC NDA 2 2022
18. A pumpkin weighs 7.5 N. On submerging it completely in water, ¾ L of water gets displaced. The acceleration due to gravity at the place where the pumpkin was weighed is 10 m/s². Which one of the following is the correct value of the density of the pumpkin ?Asked in UPSC NDA 2 2024
19. At which temperature does liquid water show maximum density ?Asked in UPSC NDA 2 2024
20. Bleeding from nose is caused when a person is there at :Asked in OPSC CS Prelims 2020
21. If an unsaturated sugar solution is prepared by mixing 100 grams of sugar with half litre of water, which of the following physical quantities will not change?Asked in UPPCS Prelims 2017
22. Bose-Einstein Condensate (BEC) is formed by cooling a gas of extremely low density, about one-hundredthousandth the density of normal air. This is treated asAsked in UPSC CISF AC EXE 2017
23. Air is filled in vehicle tyres because—Asked in UPPCS Prelims 2008
24. Why does an iron nail float on mercury while it sinks in water ?Asked in UPPCS Prelims 1994
25. The maximum density of water is atAsked in UPPSC Upper Mains 2015