(801) The half life of a radioactive element is 8-days. How long it take to reduce it from 10 mg to 5 mg?
- A. 4 days
- B. 12 days
- C. 16 days
- D. 8 days
(802) The phenomenon of Aurora Borealis, the display of red and green lights in northern hemisphere is due to radiations from ?
- A. Ionosphere
- B. Tropospher e
- C. Mesospher e
- D. Stratospher e
(803) The echo (reflected sounD. will be distinctly heard only at ordinary temperatures if the distance of the reflecting surfaces from the source of sound is at least ?
- A. 1120 ft
- B. 120 ft
- C. 56 ft
- D. 100 ft
(804) Lactometer is a type of Hydrometer which is used to measure the specific gravity of ?
- A. Honey
- B. Water
- C. Milk
- D. olive oil
(805) In humans , most nutrient molecules are absorbed by the ?
- A. Small intestine
- B. Stomach
- C. Liver
- D. Large intestine
(806) The main constituent of hemoglobin is ?
- A. Chlorine
- B. Iron
- C. Calcium
- D. None of these
(807) Which of the following vitamins promote healthy functioning of eyes in human beings?
- A. Vitamin B
- B. Vitamin C
- C. Vitamin A
- D. Vitamin D
(808) ECG is used for the diagnosis of aliments of ?
- A. Brain
- B. Heart
- C. Kidneys
- D. Lungs
(809) An astronaut inside a spacecraft is in a state of weightlessness. This implies that?
- A. The mass of the astronaut is reduced to zero
- B. Gravity inside the spacecraft ceases to act
- C. The astronaut is outside the influence of the earth’s gravitationa l force
- D. The astronaut and the spacecraft are both in a free- failing state
(810) Lead ball falls through water more slowly than through air because ?
- A. The value of ‘g’ is less in water
- B. Density of air is less than that of water
- C. Of the viscous force in water
- D. Of The surface tension of water
(811) Materials for rain-proof coats and tents owe their water proof properties to ?
- A. Surface tension
- B. Viscosity
- C. Specific gravity
- D. Elasticity
(812) The sunlight can reach a depth of meters in the ocean
- A. 80
- B. 200
- C. 120
- D. None
(813) Equator passes through one of these countries ?
- A. Saudi Arabia
- B. Italy
- C. Japan
- D. None
(814) The Beta particles are fast moving ?
- A. Protons
- B. Electrons
- C. Neutrons
- D. None
(815) It is impossible for a type of O+ baby to have a type of mother:
- A. AB-
- B. O-
- C. O+
- D. none
(816) Which one of the following is the main culprit in the thinning of Ozone layer in the earth’s stratosphere?
- A. Carbon dioxide
- B. Chlorofluor ocarbons
- C. Nitrogen oxides
- D. Methane
(817) is anything that takes up space and has mass.
- A. Matter
- B. Gravity
- C. Energy
- D. Plasma
(818) The speed of light is ?
- A. 280,000 km/s
- B. 300,000 km/s
- C. 320,000 km/s
- D. none of these
(819) The energy stored in a dam is ?
- A. Kinetic energy
- B. Electrical energy
- C. Potential energy
- D. None of these
(820) The distance of mercury from sun is ?
- A. 56 million km
- B. 57.9 million km
- C. 58.9 million km
- D. 59.1 million
(821) Which of the following planets have the longest day?
- A. Jupiter
- B. Mercury
- C. Earth
- D. Venus
(822) The Shortest (smallest) bone in human body is ?
- A. Stapes
- B. Tibia
- C. Femur
- D. Humerus
(823) is used for measuring velocity?
- A. Speedomet er
- B. Anemomet er
- C. Odometer
- D. Hygrometer
(824) What sub-class of neutron star is known for its extremely high magnetic field?
- A. Magnetar
- B. Quasar
- C. Magneto
- D. Magnetta
(825) The Big Dipper is part of which constellation?
- A. Ursa Major
- B. Ursa Minor
- C. The Great Bear
- D. A. and C. above