(401) The gas, commonly known as “laughing gas”, is
- A. Carbon Dioxide
- B. Sulfur Dioxide
- C. Nitrous Oxide
- D. Sodium Oxide
(402) About 50% of the Earth’s crust, including the waters on the Earth and atmosphere, is? Page 26 o
- A. Oxygen f 65
- B. Cabon Dioxide
- C. Silicon
- D. Clay
(403) Bronze medal is made up of metals ?
- A. copper,nick el
- B. copper, tin
- C. copper, silver
- D. copper, zinc
(404) A light year is a unit of ?
- A. Time
- B. Energy
- C. Length
- D. Mass
(405) Which of the following is not a part of Darwinism?
- A. Over production
- B. Natural selection
- C. Inheritance for acquired characters
- D. Competitio n for survival
(406) Hygrometer is used for measuring the ?
- A. Speed of sound
- B. Density of milk
- C. Humidity of air
- D. Specific gravity of liquids
(407) Television signals are converted into light signals by ?
- A. Optical fiber
- B. Transistor
- C. Decoder
- D. Photo diode
(408) Sedimentary rocks are ?
- A. Porous
- B. Hard
- C. Rough
- D. Brittle
(409) Name the famous book of Ibn-Sina in which he discussed human physiology and medicine ?
- A. Al- Qanun
- B. Al- Masudi
- C. New Renaissance
- D. Tadhkira
(410) German Silver is an alloy of ?
- A. Zn + Ni
- B. Cu + Zn
- C. Cu + Ni
- D. Cu + Sn
(411) Night vision is possible with the help of ?
- A. Red light
- B. Violet light
- C. Infrared Rays
- D. Ultra violet Light
(412) Tibia is a bone found in the ?
- A. Skull
- B. Arm
- C. Leg
- D. Face
(413) Which gland in the human body is called the master gland?
- A. Pancreas
- B. Thyroid
- C. Pituitary
- D. Spleen
(414) Leukemia is a disease of the ?
- A. Lungs
- B. Blood
- C. Skin
- D. Nerves
(415) The beautiful color patterns exhibited by a peacock in its tail feathers are due to ?
- A. Selective absorption of light
- B. Selective re ection of light
- C. Sinterferenc e of light
- D. Natural colour pattern of feathers
(416) What is ‘Stealth Technology‘?
- A. A device which when attached to an aircraft makes it invisible on the radar
- B. A coating which reduces the visibility of an aircraft on radar
- C. A Technology by which it is possible for the aircraft’s to spy in the enemy air- space
- D. A technology by using which paratrooper s can be dropped stealthily behind the enemy columns.
(417) The cracking sound heard when dry hair is combed with a hard rubber comb is due to ?
- A. The hair barging against the charged comb
- B. Small electric sparks
- C. The rubbing of the comb with the hair
- D. None of the above
(418) Who proposed this concept “All motion is relative”?
- A. Albert Einstein
- B. John Kepler
- C. Galileo Galilie
- D. None
(419) Which month of calendar year can lack a new moon?
- A. December
- B. February
- C. May
- D. None
(420) He was the first scientist to prove that Planets move around the sun?
- A. Archimedes
- B. Galileo Galilei
- C. John Kepler
- D. None
(421) An area of microbiology that is concerned with the occurence of disease in human population is?
- A. Immunolog y
- B. Paracitology
- C. Epidemiolo gy
- D. none
(422) What is the smallest unit of heredity?
- A. Chromosom es
- B. Gene
- C. Nucleotides
- D. none
(423) Copper is used in the production of ?
- A. Brick kilns
- B. Children toys
- C. Kitchen utilities
- D. Electric wires
(424) have no charge?
- A. Neutrons
- B. Protons
- C. Electrons
- D. None of These
(425) Electron was discovered by?
- A. Michael Faraday
- B. James Maxwell
- C. Yuri Gagarin
- D. J.J Thomson