MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 551. |
Decibel is the unit for |
| A. | speed of light |
| B. | radio wave frequency |
| C. | intensity of sound |
| D. | intensity of heat |
| Answer» D. intensity of heat | |
| 552. |
Who suggested that most of the mass of the atom is located in the nucleus? |
| A. | Thompson |
| B. | Bohr |
| C. | Rutherford |
| D. | Einstein |
| Answer» D. Einstein | |
| 553. |
The vast resources of unutilised natural gas can be used in the production of |
| A. | graphite |
| B. | Synthetic petroleum |
| C. | fertilisers |
| D. | carbide |
| Answer» D. carbide | |
| 554. |
Mesons are found in |
| A. | Laser beam |
| B. | X-rays |
| C. | Gamma rays |
| D. | Cosmic rays |
| Answer» E. | |
| 555. |
Nuclear fission is caused by the impact of |
| A. | neutron |
| B. | proton |
| C. | deuteron |
| D. | electron |
| Answer» B. proton | |
| 556. |
How does common salt help in separating soap from the solution after saponification? |
| A. | By decreasing density of Soap |
| B. | By decreasing solubility of Soap |
| C. | By increasing density of Soap |
| D. | By increasing solubility of Soap |
| Answer» C. By increasing density of Soap | |
| 557. |
Fathom is the unit of |
| A. | sound |
| B. | depth |
| C. | frequency |
| D. | distance |
| Answer» C. frequency | |
| 558. |
In an atomic nucleus, neutrons and protons are held together by |
| A. | gravitational forces |
| B. | exchange forces |
| C. | coulombic forces |
| D. | magnetic forces |
| Answer» C. coulombic forces | |
| 559. |
The wavelength of X-rays is of the order of |
| A. | 10 micron |
| B. | 1 angstrom |
| C. | 1 cm |
| D. | 1 m |
| Answer» C. 1 cm | |
| 560. |
One fathom is equal to |
| A. | 6 feet |
| B. | 6 meters |
| C. | 60 feet |
| D. | 100 cm |
| Answer» B. 6 meters | |
| 561. |
'Bar' is the unit of |
| A. | temperature |
| B. | heat |
| C. | atmospheric pressure |
| D. | current |
| Answer» D. current | |
| 562. |
In vulcanisation, natural rubber is heated with |
| A. | Carbon |
| B. | Silicon |
| C. | Sulphur |
| D. | Phosphorous |
| Answer» D. Phosphorous | |
| 563. |
Isotopes are separated by |
| A. | crystallisation |
| B. | sublimation |
| C. | distillation |
| D. | filtration |
| Answer» D. filtration | |
| 564. |
Which of the following is a protein? |
| A. | Natural rubber |
| B. | Starch |
| C. | Cellulose |
| D. | None of these |
| Answer» B. Starch | |
| 565. |
How many colours the sunlight spectrum has? |
| A. | Three |
| B. | Seven |
| C. | Four |
| D. | Five |
| Answer» C. Four | |
| 566. |
Electric current is measure by |
| A. | commutator |
| B. | anemometer |
| C. | ammeter |
| D. | voltmeter |
| Answer» D. voltmeter | |
| 567. |
Knot is a unit of speed of which of the following? |
| A. | Aeroplane |
| B. | Light waves |
| C. | Ship |
| D. | Sound waves |
| Answer» D. Sound waves | |
| 568. |
In an atomic explosion, enormous energy is released which is due to |
| A. | conversion of chemical energy into heat energy |
| B. | conversion of mechanical energy into nuclear energy |
| C. | conversion of mass into energy |
| D. | conversion of neutrons into protons |
| Answer» D. conversion of neutrons into protons | |
| 569. |
'No two electrons in an atom can have the same set of four quantum numbers' is |
| A. | Newton's law |
| B. | Bohr's law |
| C. | Aufbau principle |
| D. | Pauli's exclusion principle |
| Answer» E. | |
| 570. |
One horse power is equal to |
| A. | 746 watts |
| B. | 748 watts |
| C. | 756 watts |
| D. | 736 watts |
| Answer» B. 748 watts | |
| 571. |
Detergents used for cleaning clothes and utensils contain? |
| A. | bicarbonates |
| B. | bismuthates |
| C. | sulphonates |
| D. | nitrates |
| Answer» D. nitrates | |
| 572. |
Which radioactive pollutant has recently drawn to public, due to its occurrence in the building material? |
| A. | Thorium |
| B. | Radium |
| C. | Plutonium |
| D. | Radan |
| Answer» B. Radium | |
| 573. |
Paper is manufactured by |
| A. | Wood and resin |
| B. | Wood, sodium and bleaching powder |
| C. | Wood, calcium, hydrogen sulphite and resin |
| D. | Wood and bleaching powder |
| Answer» D. Wood and bleaching powder | |
| 574. |
Optic fibres are mainly used for which of the following? |
| A. | Musical instruments |
| B. | Food industry |
| C. | Weaving |
| D. | Communication |
| Answer» E. | |
| 575. |
Which of the following has a least penetrating power? |
| A. | All have same penetrating power |
| B. | Beta Particles |
| C. | Alpha particles |
| D. | Gamma rays |
| Answer» D. Gamma rays | |
| 576. |
What are the soaps? |
| A. | Salts of silicates |
| B. | Mixture of glycerol and alcohols |
| C. | Sodium or potassium salts of heavier fatty acids |
| D. | Esters of heavy fatty acids |
| Answer» D. Esters of heavy fatty acids | |
| 577. |
Which type of fire extinguisher is used for petroleum fire? |
| A. | Powder type |
| B. | Liquid type |
| C. | Soda acid type |
| D. | Foam type |
| Answer» B. Liquid type | |
| 578. |
What is the unit for measuring the amplitude of a sound? |
| A. | Decibel |
| B. | Coulomb |
| C. | Hum |
| D. | Cycles |
| Answer» B. Coulomb | |
| 579. |
Which of the following was to be discovered first in the chromospheres of the sun? |
| A. | Krypton |
| B. | Xenon |
| C. | Neon |
| D. | Helium |
| Answer» E. | |
| 580. |
From which mineral is radium obtained? |
| A. | Rutile |
| B. | Haematite |
| C. | Limestone |
| D. | Pitchblende |
| Answer» E. | |
| 581. |
Which of the following is used as a lubricant? |
| A. | Graphite |
| B. | Silica |
| C. | Iron Oxide |
| D. | Diamond |
| Answer» B. Silica | |
| 582. |
Bromine is a |
| A. | black solid |
| B. | red liquid |
| C. | colourless gas |
| D. | highly inflammable gas |
| Answer» C. colourless gas | |
| 583. |
The variety of coal in which the deposit contains recognisable traces of the original plant material is |
| A. | bitumen |
| B. | anthracite |
| C. | lignite |
| D. | peat |
| Answer» E. | |
| 584. |
The hardest substance available on earth is |
| A. | Gold |
| B. | Iron |
| C. | Diamond |
| D. | Platinum |
| Answer» D. Platinum | |
| 585. |
Tetraethyl lead is used as |
| A. | pain killer |
| B. | fire extinguisher |
| C. | mosquito repellent |
| D. | petrol additive |
| Answer» E. | |
| 586. |
Gypsum is added to cement clinker to |
| A. | increase the tensile strength of cement |
| B. | decrease the rate of setting of cement |
| C. | facilitate the formation of colloidal gel |
| D. | bind the particles of calcium silicate |
| Answer» C. facilitate the formation of colloidal gel | |
| 587. |
Wood is the main raw material for the manufacture of |
| A. | paint |
| B. | paper |
| C. | ink |
| D. | gun powder |
| Answer» C. ink | |
| 588. |
Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products? |
| A. | Television |
| B. | Refrigerator |
| C. | Tube light |
| D. | Cooking gas |
| Answer» C. Tube light | |
| 589. |
What is the wavelength of visible spectrum? |
| A. | 8500 - 9800 angstrom |
| B. | 7800 - 8000 angstrom |
| C. | 3900 - 7600 angstrom |
| D. | 1300 - 3000 angstrom |
| Answer» D. 1300 - 3000 angstrom | |
| 590. |
Rayon is chemically |
| A. | cellulose |
| B. | pectin |
| C. | glucose |
| D. | amylase |
| Answer» B. pectin | |
| 591. |
Nautical mile is a unit of distance used in |
| A. | navigation |
| B. | road mile |
| C. | astronomy |
| D. | measuring the boundaries of a nation |
| Answer» B. road mile | |
| 592. |
One kilometre is equal to how many miles? |
| A. | 0.84 |
| B. | 0.5 |
| C. | 1.6 |
| D. | 0.62 |
| Answer» E. | |
| 593. |
Very small time intervals are accurately measure by |
| A. | White dwarfs |
| B. | Quartz clocks |
| C. | Atomic clocks |
| D. | Pulsars |
| Answer» D. Pulsars | |
| 594. |
The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is |
| A. | Argon |
| B. | Xenon |
| C. | Helium |
| D. | Krypton |
| Answer» D. Krypton | |
| 595. |
Kilowatt is a unit to measure |
| A. | work |
| B. | power |
| C. | electricity |
| D. | current |
| Answer» C. electricity | |
| 596. |
The gas usually filled in the electric bulb is |
| A. | nitrogen |
| B. | hydrogen |
| C. | carbon dioxide |
| D. | oxygen |
| Answer» B. hydrogen | |
| 597. |
Chemical formula for water is |
| A. | NaAlO2 |
| B. | H2O |
| C. | Al2O3 |
| D. | CaSiO3 |
| Answer» C. Al2O3 | |
| 598. |
Quartz crystals normally used in quartz clocks etc. is chemically |
| A. | silicon dioxide |
| B. | germanium oxide |
| C. | a mixture of germanium oxide and silicon dioxide |
| D. | sodium silicate |
| Answer» B. germanium oxide | |
| 599. |
Which of the gas is not known as green house gas? |
| A. | Methane |
| B. | Nitrous oxide |
| C. | Carbon dioxide |
| D. | Hydrogen |
| Answer» E. | |
| 600. |
Washing soda is the common name for |
| A. | Sodium carbonate |
| B. | Calcium bicarbonate |
| C. | Sodium bicarbonate |
| D. | Calcium carbonate |
| Answer» B. Calcium bicarbonate | |