(526) Deficiency of Vitamin-A results in                       ?
- A. Night blindness
- B. rickets
- C. scurvy
- D. hair fall
(527) The most abundant element in the Earth’s crust is                       ?
- A. Oxygen
- B. Hydrogen
- C. Carbon Dioxide
- D. Silicon
(528) 1 nanometer = ?
- A. 10- 3 meter
- B. 10- 6 meter
- C. 10- 9 meter
- D. 10- 12 meter
(529) GPS is an abbreviation for?
- A. Global Poles System
- B. Global PolySiliconi um Store
- C. Global Positioning System
- D. Global Position Structure
(530) The planets visible to us without using a telescope are                       ?
- A. 3
- B. 4
- C. 5
- D. 6
(531) Deficiency of                        causes loss of appetite and poor growth?
- A. zinc
- B. iodine
- C. copper
- D. iron
(532) The source of oxygen in photosynthesis is
- A. water
- B. salts
- C. minerals
- D. glucose
(533) The fourth state of matter is?
- A. Water
- B. Salts
- C. Vapours
- D. Plasma
(534) Addison’s disease is caused by the deficiency of                           ?
- A. Antiduretic Harmone
- B. Luteinising Harmone
- C. Melanopho re stimulating Harmone
- D. Adrenocorti cotrophic Harmone
(535) One of the main function of the earth’s ozone layer is to ?
- A. Prevent global warming
- B. Filter out ultraviolet rays
- C. Absorb pollution
- D. All of the above
(536) Role of biotechnology in the production of food based on                         ?
- A. Decomposit ion
- B. Respiration
- C. Digestion
- D. Fermentati on
(537) Bronze is an alloy of                            ?
- A. Copper and Zinc
- B. Tin and Zinc
- C. Copper and Tin
- D. Iron and Zinc
(538) Where do most of Asteroids lie?
- A. In asteroid belt between the orbits of Mars and Jupiter
- B. In asteroid belt between the orbits of Mars and Venus
- C. In asteroid belt between the orbits of Jupiter and Venus
- D. Everywhere in the sky
(539) Which one of the following is a non-metallic mineral?
- A. Manganese
- B. Magnesium
- C. Gypsum
- D. Bauxite
(540) Water is heated in a kettlE. The inside water is heated by convection. A person sitting near the fire receives heat by                   ?
- A. Conduction
- B. Convection
- C. Radiation
- D. Reflection
(541) The Continent Antarctica lies at the                      ?
- A. North pole
- B. South pole
- C. middle of the earth
- D. Equator
(542) Myopia is a defect of Human eye. it can be corrected by using a lens called?
- A. Convex lens
- B. Concave lens
- C. Cylindrical lens
- D. Plano convex lens
(543) The largest part of the human brain is                         ?
- A. Medulla oblongata
- B. Cerebellum
- C. Cerebrum
- D. None of these
(544) How many bones are there in a newly born infant?
- A. 206
- B. 230
- C. 280
- D. 300
(545) Short-sightedness can be corrected by using                         ?
- A. Convex lens
- B. Concave lens
- C. Convex- concave lens
- D. Concave- convex lens
(546) A lake starts freezing because of the cold atmosphere. It will first freeze
- A. At the bottom
- B. ln the middle pan
- C. At the top surface
- D. Uniformly throughout the water body
(547) The primary function of the feathers in birds is to                     ?
- A. Provide insulation for preserving body heat
- B. Provide striking surface to the wings for flying
- C. Make the body surface waterproof
- D. impart coloration for species as well as sex recognition
(548) Detergents dissolved in water help in cleaning clothes by                    ?
- A. Increasing the temperatur e of water
- B. Reacting chemically with dirt
- C. Reducing the surface tension of water
- D. Dissolving dirt
(549) The field of specialization of famous Muslim scientist Abu Usman Aljahiz was?
- A. Botany
- B. Zoology
- C. Astronomy
- D. None
(550) Deuterium differs from Hydrogen in having:
- A. Different atomic number but same atomic weight
- B. Different atomic number and different atomic weight
- C. Same atomic number and different atomic weight
- D. None