MCQOPTIONS
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MCQOPTIONS
This section includes 6820 Mcqs, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
| 2701. |
What is the unit of force? |
| A. | poise |
| B. | pascal |
| C. | poijuli |
| D. | none of these |
| Answer» B. pascal | |
| 2702. |
When it comes out of the water, the hair of the saving brush sticks together. this is due to ? |
| A. | surface tension |
| B. | viscosity |
| C. | elasticity |
| D. | friction |
| Answer» B. viscosity | |
| 2703. |
When milk is stirred, butter separates from it. |
| A. | by gravity |
| B. | by centrifugal force |
| C. | by friction |
| D. | by heat |
| Answer» C. by friction | |
| 2704. |
A ball is dropped from a tall building with a uniform acceleration of 9.8 m/s, what will be the velocity after 3 seconds? |
| A. | 9. 8m/s |
| B. | 9. 6m/s |
| C. | 29. 4m/s |
| D. | 39. 3m/s |
| Answer» D. 39. 3m/s | |
| 2705. |
What is the escape velocity on Earth? |
| A. | 15 km. / sec |
| B. | 21. 1 km. / sec |
| C. | 7. 0 km. / sec |
| D. | 11. 2 km. / sec |
| Answer» E. | |
| 2706. |
The unit of which of the following is not Newton - Meter? |
| A. | force |
| B. | kinetic energy |
| C. | Work |
| D. | energy |
| Answer» B. kinetic energy | |
| 2707. |
Astronauts cannot stand upright in space, because . . . |
| A. | no gravity |
| B. | Viscosity force is very strong in the atmosphere |
| C. | solar wind exerts an upward force |
| D. | atmospheric pressure is too low |
| Answer» B. Viscosity force is very strong in the atmosphere | |
| 2708. |
If a body is 11.2 km from the earth. If thrown with a velocity of per second, then the body. . . |
| A. | will never return to earth |
| B. | will return after 2 hours |
| C. | will return after 24 hours |
| D. | nothing sure |
| Answer» B. will return after 2 hours | |
| 2709. |
What is the force of attraction between the molecules of the same substance called? |
| A. | adhesive force |
| B. | gravitational force |
| C. | nuclear force |
| D. | cohesive force |
| Answer» E. | |
| 2710. |
The speed of a car is 36 km/h. Express it in meters per second? |
| A. | 20 m / sec. |
| B. | 15 m / sec |
| C. | 10 m / sec |
| D. | 25 m / sec |
| Answer» D. 25 m / sec | |
| 2711. |
Do automatic wrist watches have energy? |
| A. | by spasm |
| B. | from battery |
| C. | from liquid crystals |
| D. | by the various operations of our hands |
| Answer» E. | |
| 2712. |
What is the value of escape velocity from the earth's surface? |
| A. | 7. 92 kms. / sec |
| B. | 2 . 38 km. / sec |
| C. | 11. 2 km. / sec |
| D. | 11. 28 km. / sec |
| Answer» D. 11. 28 km. / sec | |
| 2713. |
Which of the following are the heights of geostationary satellites? |
| A. | 1,000 km |
| B. | 10 , 000 km |
| C. | 36,000 km |
| D. | 12,000 km |
| Answer» D. 12,000 km | |
| 2714. |
What will be the dimension of the ratio of angular momentum and linear momentum? |
| A. | M⁰L¹T⁰ |
| B. | M⁰L¹T⁻¹ |
| C. | ML²T⁻¹ |
| D. | M⁻¹L⁻¹T⁻¹ |
| Answer» B. M⁰L¹T⁻¹ | |
| 2715. |
An iron needle floats on the surface of the water. What is the reason for this phenomenon? |
| A. | acceleration due to gravity |
| B. | buoyancy of matter |
| C. | surface tension |
| D. | viscosity |
| Answer» D. viscosity | |
| 2716. |
Which liquid has the lowest density? |
| A. | clean water |
| B. | salty water |
| C. | petrol |
| D. | Mercury |
| Answer» D. Mercury | |
| 2717. |
What is the Newton-meter unit? |
| A. | of acceleration |
| B. | Of force |
| C. | surface tension |
| D. | of energy |
| Answer» E. | |
| 2718. |
If an object has the ability to do work due to its special condition, what is it called that object? |
| A. | kinetic energy |
| B. | Speed |
| C. | potential energy |
| D. | inertia |
| Answer» D. inertia | |
| 2719. |
What is the reason behind the shape of a drop of liquid being spherical? |
| A. | viscosity |
| B. | Atmospheric pressure |
| C. | surface tension |
| D. | low load |
| Answer» D. low load | |
| 2720. |
What is the SI unit of powerWattequivalent to? |
| A. | kg m to |
| B. | kg m |
| C. | kg m |
| D. | none of these |
| Answer» D. none of these | |
| 2721. |
What is the measure of the intensity of sound called? |
| A. | Decibel |
| B. | horse power |
| C. | Centigrade |
| D. | milligram |
| Answer» B. horse power | |
| 2722. |
What is the period of a geostationary satellite? |
| A. | 9 hours |
| B. | 20 hours |
| C. | 24 hours |
| D. | 28 hours |
| Answer» D. 28 hours | |
| 2723. |
What is the name of the instrument that measures the depth of the sea? |
| A. | hydrometer |
| B. | anemometer |
| C. | Fedometer |
| D. | hygrometer |
| Answer» D. hygrometer | |
| 2724. |
What is the average temperature of the human body? |
| A. | 40.5° C |
| B. | 88.5 °C |
| C. | 36.9 °C |
| D. | 98.4 °C |
| Answer» D. 98.4 °C | |
| 2725. |
If the velocity of an object is doubled, then . . |
| A. | momentum doubles |
| B. | kinetic energy becomes four times |
| C. | Option (1) and (2) both correct |
| D. | none of these |
| Answer» D. none of these | |
| 2726. |
Two vectors whose value is different? |
| A. | their direction will be different |
| B. | their resultant cannot be null |
| C. | Their result will be zero |
| D. | none of the above |
| Answer» C. Their result will be zero | |
| 2727. |
of freely falling objects in the void. . . |
| A. | have the same speed |
| B. | have the same velocity |
| C. | have the same acceleration |
| D. | have the same force |
| Answer» D. have the same force | |
| 2728. |
What is a decibel used to measure? |
| A. | hemoglobin in blood |
| B. | sugar in urine |
| C. | sound in the atmosphere |
| D. | particles in the air |
| Answer» D. particles in the air | |
| 2729. |
Is a raindrop circular? |
| A. | due to surface tension |
| B. | due to atmospheric friction of air |
| C. | due to the gravity of the round earth |
| D. | Due to the viscosity of rain water |
| Answer» B. due to atmospheric friction of air | |
| 2730. |
What is the SI unit of Young's elasticity coefficient? |
| A. | dyne/cm |
| B. | Newton / m |
| C. | Newton / m |
| D. | m² / s |
| Answer» D. m² / s | |
| 2731. |
Some tips and related energy conversion are given below. (1) Electrical Generator – Mechanical to Electric (2) Electric Motor – Electric to Mechanical (3) Diesel Engine – Light to Electric (4) Solar Cell – Chemical to Mechanical. Which of the above pair(s) is/are matched? |
| A. | 1 and 2 |
| B. | 1 and 3 |
| C. | 2 and 4 |
| D. | 3 and 4 |
| Answer» B. 1 and 3 | |
| 2732. |
What is apyro meterused for? |
| A. | pressure |
| B. | density |
| C. | high temperature |
| D. | depth |
| Answer» D. depth | |
| 2733. |
Gun powder mixes? |
| A. | Of clay and TNT |
| B. | of sulfur, clay and charcoal |
| C. | of saltpeter, sulfur and charcoal |
| D. | tnt and charcoal |
| Answer» D. tnt and charcoal | |
| 2734. |
Which acid is used to make batteries? |
| A. | sulfuric acid |
| B. | nitric acid |
| C. | hydrochloric acid |
| D. | acetic acid |
| Answer» B. nitric acid | |
| 2735. |
What is the smallest unit of a chemical compound? |
| A. | nuclear |
| B. | electron |
| C. | proton |
| D. | molecule |
| Answer» E. | |
| 2736. |
Hypo which is used in photography, chemically called? |
| A. | silver bromide |
| B. | sodium thio sulfate |
| C. | Sodium phosphate |
| D. | sodium nitrate |
| Answer» C. Sodium phosphate | |
| 2737. |
Which substance is added to make natural rubber hard and bouncy? |
| A. | gasoline jelly |
| B. | sulfuric acid |
| C. | sulfur |
| D. | sponge |
| Answer» D. sponge | |
| 2738. |
The marshy gas which is produced on decomposition of organic matter and is mostly found in coal mines, is the name of that gas? |
| A. | ethane |
| B. | methane |
| C. | Carbon dioxide |
| D. | carbon monoxide |
| Answer» C. Carbon dioxide | |
| 2739. |
Which of the following is essentially produced in the fermentation process? |
| A. | ethyl alcohol |
| B. | methyl alcohol |
| C. | acetic acid |
| D. | yeast |
| Answer» B. methyl alcohol | |
| 2740. |
Why is sodium stored in kerosene? |
| A. | to maintain in its original form |
| B. | It oxidizes in air |
| C. | evaporation in the air |
| D. | it starts burning in the air |
| Answer» C. evaporation in the air | |
| 2741. |
Filling helium in balloons is considered more useful than hydrogen, because? |
| A. | it is cheap |
| B. | is less heavy |
| C. | higher flying capacity |
| D. | It does not form explosive mixture with air |
| Answer» E. | |
| 2742. |
By which process oil is converted into Vegetable Ghee? |
| A. | Hydrogenation |
| B. | Distillation |
| C. | उपचयन (Oxidation |
| D. | अपचयन (Reduction |
| Answer» B. Distillation | |
| 2743. |
With which element most compounds are formed with hydrogen? |
| A. | oxygen |
| B. | silicone |
| C. | Carbon |
| D. | nitrogen |
| Answer» D. nitrogen | |
| 2744. |
What is the acidic nature of vinegar? |
| A. | citric acid |
| B. | sulfuric acid |
| C. | hydrochloric acid |
| D. | acetic acid |
| Answer» E. | |
| 2745. |
Industrial production of polyethylene is done by polymerization of? |
| A. | Methane |
| B. | एसीटिलीन (Acetylene |
| C. | इथाईलीन (Ethylene |
| D. | Styrene |
| Answer» D. Styrene | |
| 2746. |
Which element is most commonly found in minerals and rocks? |
| A. | Carbon |
| B. | silicone |
| C. | hydrogen |
| D. | boron |
| Answer» B. silicone | |
| 2747. |
Which of the following gases is not present in the atmosphere? |
| A. | nitrogen |
| B. | helium |
| C. | chlorine |
| D. | krypton |
| Answer» D. krypton | |
| 2748. |
Which of the following method is used to remove salt from sea water? |
| A. | sublimation |
| B. | evaporation |
| C. | crystallization |
| D. | distillation |
| Answer» C. crystallization | |
| 2749. |
On heating potassium chlorate? |
| A. | nitrogen gas is released |
| B. | oxygen gas is released |
| C. | hydrogen gas is released |
| D. | none of these |
| Answer» C. hydrogen gas is released | |
| 2750. |
What is the chemical substance present in bones and teeth called? |
| A. | calcium chloride |
| B. | calcium borate |
| C. | calcium phosphate |
| D. | calcium sulfate |
| Answer» D. calcium sulfate | |