Antibiotics are medications used to treat bacterial infections by either killing the bacteria (bactericidal) or inhibiting their growth (bacteriostatic). The way antibiotics work depends on

Q. Give the ratio in which hydrogen and oxygen are present in water by volume. (a) 1:2 (b) 1:1 (c) 2:1 (d) 1:8 Correct Answer:

1. Entomology is the science that studies (a) Behavior of human beings (b) Insect s (c) The origin and history of technical and scientific terms (d)

1. BCG Vaccine is used to prevent:  Answer: Tuberculosis  2. Which is known as ‘growth gland’:  Answer: Pituitary  3. The first effective vaccine against polio was

1. The substance that can be used as a hypnotic: Barbituric acid 2. The ‘fixing agent’ used in photographic  film is: Sodium thiosulphate 3. The maximum

1031. Photo Electric effect was discovered by  – Henrich Hertz 1032. The pigment which gives orange colour to a carrot  – Carotene 1033. Planet Venus

1001. Kreb’s cycle takes place in  – Mitochondria  1002. ………………….. is the longest glacier found in the world.  – Lambert-Fisher (Australia) 1003. The largest blood

966. Downs syndrome is also known as – Trisomy 21.  967. Electromagnetic Induction was discovered by  – Michael Faraday  968. An element having the name

931. The element stored in oil due to its high reactivity  – Barium 932. The element which has the highest reactivity or electronegativity – Fluorine 

901. Summer sleep of animals is known as  – aestivation.  902. ‘The true sign of intelligence is not knowledge but imagination’  – Albert Einstein. 903.

866. Which chemical is used for the preservation of a biological specimen? Formalin  867. What are the constituent elements of sugar?  Carbon, Hydrogen and Oxygen

866. Which chemical is used for the preservation of a biological specimen? Formalin  867. What are the constituent elements of sugar?  Carbon, Hydrogen and Oxygen

831. What is the chemical name of Ajinomoto?  Monosodium Glutamate 832. What is known as ‘the wonder child of electronics’? Transistors  833. Which acid is

796. What is the use of a commutator?  To change the direction of electric current  797. Which is known as ‘the stress hormone’ in plants?

726. A person suffering from colour blindness cannot distinguish which colours? Red& green  727. Which is the chief nitrogenous waste in humans? Uric acid  728.

691. Which element is used to coat the photocopying drum of Xerox machine?  Selenium  692.  Which acid is present in colas?  Phosphoric Acid  693. Which

656. Which chemical property of an element is described by the Pauling scale? Electronegativity  657. What is the full form of the LED? Light Emitting

621. Which chemically inactive gases are usually filled in bulbs to prolong the life of filament? Nitrogen & Argon 622. What is the SI unit

586. The level of glucose in human blood is ……mg per 100ml of blood:  Answer:  80-120  587. Bone is used as fertilizer as it contains: 

556. A solid piece of iron sinks in water but float s in mercury. This is because of the (a) Average density of water and

526. If you wish to have the maximum value of in respect of Vitamin D, which of the following would you choose? (a) Cheese (b)

496. A substance used for destroying micro-organisms and rendering the material sterile is called (a) An antibody (b) An antitoxin (c) An antigen (d) A 

461. What per cent of the human body is the brain:  Answer: 2  462. The basis of Protein:  Answer: Amino acid  463. Tidal volume is

426. Which sense organ is most developed in birds? Eye 427. Vermiculture is related to: Earth Worm 428. Silver Revolution is related to the enhanced

386. The colour of blood in annelids: Green 387. Ambergreese is obtained from: Whale 388. Ranikhet disease of poultry is caused by: Virus 389. The

351. Which is called ‘tree of heaven’? Walnut 352. Most suitable bio fertilizer for rice field: Azolla 353. Cross-pollination fertilization between two varieties: Hybridization 354.

321. In breeder reactors, uranium-238 is converted into – Plutonium-239 322. The process of elimination of water from any system is called. – dehydration 323.

286. What is the voltage of the electricity used for the domestic purpose? (a) 460 (b) 110 (c) 230 (d) 275 Answer: (c) 287. The

251. Barbari is a type of goat originated in Berbera region of. (a) America                     (b) Africa

221. The organism with the highest power of olfaction: (a) Dog                 (b) Shark (c) Snake       

191. Which is a silicate mineral aluminium and fluorine? (a) Diamond             (b) Emerald        (c) Topaz     

156. _______ is referred as wonder metal. Ans: Titanium 157. Cathode rays are discovered by _______ Ans: Julius Plucker 158. Anode rays are discovered by

121.  Iron coated with _________ is called galvanized iron. Ans: Zinc 122. Compounds of _________ are used as cooling agents in refrigerators. Ans: Flourine 123.

91. CaSO₄.2H₂O is the chemical formula of (a) Gypsum (b) Plaster of Paris (c) Caustic Soda (d) Baking Soda Answer:( a) 92. The elements in

61. Chlorine gas can be prepared by (a) Bosch Process (b) Haber Process (c) Ostwald Process (d) Deacon’s Process Answer:( d) 62. The isotope of

31. Which instrument is used to measure altitudes in aircraft? (a) Audiometer (b) Ammeter (c) Altimeter (d) Anemometer Answer:(c ) 32. The absorption of ink

1. The name of the ship Charles Darwin used for his epic voyage was (a) HMS Beagle (b) HMS Victory (c) RMS Lusitania (d)RMS Titanic

1. Who coined the term biodiversity? a. Earnst Haeckel b. Edward Laurent c. Charles Darwin d. Walter G Rosen Answer: (b)   2. The difference

* ASLV stands for Augmented Satellite Launch Vehicle * SLV 3 is India’s first experimental Satellite Launch Vehicle * GSLV used solid fuel in the

💠 मानव शरीर की किस ग्रन्थि को ‘मास्टर ग्रन्थि’ कहा जाता है? ➛ “पीयूषिका” 💠 रखीय संवेग संरक्षण किसके बराबर है? ➛ “न्यूटन के द्वितीय

  Discovery/Invention Discoverer/Inventor Time/Period Image Magnifying Glass Roger Bacon (Great Britain) 13th Century Printing Press Johannes Gutenberg (German) 1440 (About) Watch (Portable Clocks) Peter Henlein (Germany)

तारे अपनी ऊर्जा किस प्रकार प्राप्त करते हैं? Ans नाभिकीय संयोजन के फलस्वरूप लोहे पर जंग लगना किसका उदाहरण है? Ans ऑक्सीकरण निम्न में से

दाँत मुख्य रूप से किस पदार्थ के बने होते हैं? Ans डेंटाइन के किस जंतु की आकृति पैर की चप्पल के समान होती है? Ans