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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.
| 1751. |
Aqueous solution of which of the following salts turns red litmus blue? |
| A. | Na₂CO₃ |
| B. | NaHCO₃ |
| C. | Na₂CO₃ - 10HO |
| D. | all of the above |
| Answer» B. NaHCO₃ | |
| 1752. |
Hydrochloric acid is more potent than acetic acid because . . . |
| A. | It has less number of hydrogen molecules. |
| B. | It is completely ionized to produce H⁺ ions. |
| C. | it contains chlorine |
| D. | does not contain oxygen |
| Answer» C. it contains chlorine | |
| 1753. |
Which of the following is an acidic salt? |
| A. | HCIO |
| B. | AgBr |
| C. | HFN |
| D. | H₂CO₃ |
| Answer» E. | |
| 1754. |
Who determined the P-H value? |
| A. | Levozier |
| B. | Priestley |
| C. | Cavendish |
| D. | sorenson |
| Answer» E. | |
| 1755. |
What is neutralization done in action? |
| A. | acid |
| B. | alkali |
| C. | salt |
| D. | salt and water |
| Answer» E. | |
| 1756. |
Aqueous solution of ammonia chloride is? |
| A. | acidic |
| B. | alkaline |
| C. | Moody |
| D. | colorful |
| Answer» C. Moody | |
| 1757. |
In which medium does the pepsin enzyme function? |
| A. | alkaline |
| B. | acidic |
| C. | Moody |
| D. | saline |
| Answer» B. acidic | |
| 1758. |
Does insulin convert hormones? |
| A. | fat into glucose |
| B. | protein into glucose |
| C. | glucose into glycogen |
| D. | glycogen into glucose |
| Answer» D. glycogen into glucose | |
| 1759. |
What is the link between glycolysis and the Krebs cycle? |
| A. | citric acid |
| B. | acetyl |
| C. | succinic acid |
| D. | fumaric acid |
| Answer» C. succinic acid | |
| 1760. |
Protein is a digestive enzyme? |
| A. | trypsin |
| B. | amylepsin |
| C. | lipase |
| D. | amylase |
| Answer» B. amylepsin | |
| 1761. |
The value of respiration coefficient is greater than 1? |
| A. | in carbohydrates |
| B. | in fat |
| C. | in protein |
| D. | in organic acids |
| Answer» E. | |
| 1762. |
An alkali is a substance that . . |
| A. | Protron gives? |
| B. | receives a proton |
| C. | gives electrons |
| D. | accepts electron pair |
| Answer» C. gives electrons | |
| 1763. |
What is the net gain of ATP molecules in glycolysis? |
| A. | of 2 molecules |
| B. | of 4 molecules |
| C. | of 6 molecules |
| D. | of 10 molecules |
| Answer» B. of 4 molecules | |
| 1764. |
The salts which are free from acidic hydrogen atom or hydroxyl ion are called |
| A. | common salt |
| B. | acid salt |
| C. | phosphoric salt |
| D. | Mixed salts |
| Answer» B. acid salt | |
| 1765. |
Shows pH value. . . |
| A. | The quality of the chemical used to make the photo from the negative |
| B. | rating of a solution to be acidic or basic |
| C. | magnitude of earthquake |
| D. | evaluator of milk purity |
| Answer» C. magnitude of earthquake | |
| 1766. |
What helps in the conversion of trypsinogen to trypsin? |
| A. | hydrochloric acid |
| B. | pepsin |
| C. | Aneurysm |
| D. | gastrin |
| Answer» B. pepsin | |
| 1767. |
Does red litmus paper turn blue? |
| A. | acid |
| B. | alkali |
| C. | salt |
| D. | none of these |
| Answer» C. salt | |
| 1768. |
Acid is a substance that . . |
| A. | accepts electrons. |
| B. | Provides electrons. |
| C. | gives protons. |
| D. | Gives OH⁻ ion. |
| Answer» D. Gives OH⁻ ion. | |
| 1769. |
Chikungunya happens, a |
| A. | genetic disease |
| B. | deficiency disease |
| C. | pathogenic disease |
| D. | congenital disease |
| Answer» D. congenital disease | |
| 1770. |
Which one of the following is not a source of Vitamin C? |
| A. | Milk |
| B. | Amla |
| C. | Lemon |
| D. | Green chilli |
| Answer» B. Amla | |
| 1771. |
Where do fish breathe? |
| A. | Nose |
| B. | lungs |
| C. | gills |
| D. | Wing |
| Answer» D. Wing | |
| 1772. |
Which of the following is baking soda? |
| A. | sodium bicarbonate |
| B. | sodium carbonate |
| C. | Sodium chloride |
| D. | sodium hydroxide |
| Answer» B. sodium carbonate | |
| 1773. |
What is Mohr salt? |
| A. | simple salts |
| B. | hybrid salt |
| C. | double salt |
| D. | complex salts |
| Answer» D. complex salts | |
| 1774. |
Where is the clitellum structure found? |
| A. | in cockroach |
| B. | in the frog |
| C. | in earthworms |
| D. | in leech |
| Answer» D. in leech | |
| 1775. |
If the mother carrier and the father are normal, how many boys will have hemophilia? |
| A. | 1 |
| B. | 0 . 75 |
| C. | 0 . 5 |
| D. | 0 . 25 |
| Answer» D. 0 . 25 | |
| 1776. |
choose the odd one ? |
| A. | DPT - Vaccine |
| B. | DOTS - Tuberculosis |
| C. | AB⁺ - Omniscient |
| D. | adrenaline - hormone |
| Answer» D. adrenaline - hormone | |
| 1777. |
The tissue that never gets tired? |
| A. | Cardiac muscle fibers |
| B. | Skeletal muscle fibers |
| C. | Smooth muscle fibers |
| D. | Stiff muscle fibers |
| Answer» B. Skeletal muscle fibers | |
| 1778. |
In whose presence do green plants make food? |
| A. | Light |
| B. | dark |
| C. | Heat |
| D. | mineral salts |
| Answer» B. dark | |
| 1779. |
What are examples of decomposers in a aquatic ecosystem? |
| A. | algae and fungi |
| B. | algae and bacteria |
| C. | bacteria and fungi |
| D. | plankton and bacteria |
| Answer» D. plankton and bacteria | |
| 1780. |
Which of the following is an oxidising agent? |
| A. | KMnO₄ |
| B. | K₂Cr₂O7 |
| C. | HHO₃ |
| D. | All of the above |
| Answer» E. | |
| 1781. |
Which of the following substances has the highest specific energy? |
| A. | Iron |
| B. | copper |
| C. | Mercury |
| D. | Water |
| Answer» E. | |
| 1782. |
The phenomenon of simultaneous inheritance of genes and maintenance of parental pairs in the progeny is called? |
| A. | gene exchange |
| B. | Engagement |
| C. | reverse hybridization |
| D. | disassembly |
| Answer» C. reverse hybridization | |
| 1783. |
What is the trade name of vinegar? |
| A. | acetic acid |
| B. | chloroform |
| C. | carbon tetrachloride |
| D. | ethyl alcohol |
| Answer» B. chloroform | |
| 1784. |
Which is the major combustion component of dung gas? |
| A. | methane |
| B. | Carbon dioxide |
| C. | hydrogen |
| D. | propane |
| Answer» B. Carbon dioxide | |
| 1785. |
Oxytocin hormone is necessary for what? |
| A. | For milk secretion in mammals. |
| B. | to maintain gestation in mammals |
| C. | To keep blood sugar level under control. |
| D. | To control blood circulation. |
| Answer» B. to maintain gestation in mammals | |
| 1786. |
Chilgoza is obtained? |
| A. | from Cycas Revoluta |
| B. | from Cycas circinalis |
| C. | from Pinus girardiana |
| D. | from Pinus roxburghai |
| Answer» D. from Pinus roxburghai | |
| 1787. |
What is the pure form of carbon? |
| A. | Diamond |
| B. | graphite |
| C. | charcoal |
| D. | Fullerin |
| Answer» B. graphite | |
| 1788. |
From which of the following litmus is obtained? |
| A. | algae |
| B. | Fungus |
| C. | Lichen |
| D. | Glycogen |
| Answer» D. Glycogen | |
| 1789. |
When a red rose is placed in blue light, what does it look like? |
| A. | Red |
| B. | Blue |
| C. | rose |
| D. | Black |
| Answer» E. | |
| 1790. |
A scooter driver wants to see the shadow of a distant object from behind his scooter, he should use |
| A. | plane mirror |
| B. | concave mirror |
| C. | Convex mirror |
| D. | plane and concave mirror |
| Answer» D. plane and concave mirror | |
| 1791. |
Image formed by camera? |
| A. | real and straight |
| B. | imaginary and straight |
| C. | real and reverse |
| D. | imaginary and inverted |
| Answer» B. imaginary and straight | |
| 1792. |
Which gas can cause acid rain? |
| A. | CO₂ |
| B. | CO |
| C. | SO₂ |
| D. | CH₄ |
| Answer» D. CH₄ | |
| 1793. |
Which of the following pollutes the air the most? |
| A. | carbon dioxide |
| B. | carbon monoxide |
| C. | dry clay |
| D. | salt dissolution |
| Answer» C. dry clay | |
| 1794. |
What is the reason for small pieces of camphor dancing on the surface of water? |
| A. | viscosity |
| B. | surface tension |
| C. | solubility of camphor |
| D. | water density |
| Answer» C. solubility of camphor | |
| 1795. |
What is the reason for the blue color of the sky? |
| A. | reflection |
| B. | Rotation |
| C. | scatter |
| D. | withdrawal |
| Answer» D. withdrawal | |
| 1796. |
Which acid does not contain oxygen? |
| A. | nitric acid |
| B. | Sulfuric Acid (Odor Acid) |
| C. | Hydrochloric Acid (Salt Acid) |
| D. | All of the above |
| Answer» D. All of the above | |
| 1797. |
The major inert gas obtained as a component of natural gas is |
| A. | helium |
| B. | neon |
| C. | argon |
| D. | krypton |
| Answer» B. neon | |
| 1798. |
With the help of which the purity of a metal can be determined? |
| A. | pascal rule |
| B. | boyle's law |
| C. | Archimedes' theory |
| D. | principle of conservation of mass |
| Answer» B. boyle's law | |
| 1799. |
What is the oxidation number of oxygen in OF? |
| A. | 0 . 3 |
| B. | 3 |
| C. | 0 . 1 |
| D. | 2 |
| Answer» E. | |
| 1800. |
Due to which Plaster of Paris freezes? |
| A. | carbon dioxide |
| B. | hydrolysis |
| C. | hydration |
| D. | D - hydration |
| Answer» E. | |