Q81) Which of the following is used to remove rust stains on clothes:
A) Kerosene
B) Lime
C) Oxalic Acid Solution
D) None of the Above

Q82) Spherical form of Raindrops is due to:
A) Density of Liquid
B) Surface Tension
C) Atmospheric Pressure
D) Gravitational Force

Q83) The principle of Fuse is:
A) Chemical effect of Electricity
B) Mechanical effect of Electricity
C) Heating effect of Electricity
D) Magnetic effect of Electricity

Q84) Cinnabar is an ore/mineral of:
A) Lead
B) Manganese
C) Molybdenum
D) Mercury

Q85) A pungent smell is often present near the urenals is due to:
A) Sulphur Dioxide
B) Chlorine
C) Ammonia
D) Urea

Q86) The energy of wind is:
A) Only Potential
B) Only Kinetic
C) Electrical
D) Potential & Kinetic Both

Q87) Penicillin is obtained from:
A) Yeast
B) Algae
C) Fungus
D) Lichen

Q88) Bauxite is the ore of:
A) Alluminium
B) Iron
C) Copper
D) Gold

Q89) Brass is an alloy of:
A) Copper and Iron
B) Zinc and Iron
C) Copper and Zinc
D) Iron and Nickel

Q90) The safest temperature for keeping food fresh in a refrigerator is:
A) 0°
B) 4°
C) 8°
D) 10°

Q91) The chemical component that is inveribly found in all viruses is:
A) Proteins
B) Lipids
C) DNA
D) RNA

Q92) Why is Carbon Monoxide a pollutant:
A) Makes Nervous System Inactive
B) It Reacts with Oxygen
C) It Reacts with Haemoglobin
D) It Inhibits Glycolysis

Q93) Blood enter the Kedney through the:
A) Renal Artery
B) External Liliac Energy
C) Axillary Artery
D) Ulnar Artery

Q94) Who measured the velocity of light first:
A) Galileo
B) Newton
C) Einstein
D) Romer

Q95) Which of the following forces combine together to keep planets in their respective orbits:
A) Gravitation and Centripetal
B) Nuclear and Centrifugal
C) Gravitation and Centrifugal
D) Potential and Kinetic

Q96) Meghnad Saha is known for his contribution in which of the following fields:
A) Medical Science
B) Physics
C) Environmental Science
D) History

Q97) The chemical composition of cement is:
A) Limestone, Clay and Gypsum
B) Limestone and Clay
C) Limestone and Gypsum
D) Clay and Gypsum

Q98) Meibomian glands are located in:
A) Ear
B) Nose
C) Eye
D) Skin

Q99) The latex of which plant is used commercially:
A) Papaya Plant
B) Sial Kanta Plant
C) Rubber Plant
D) Banyan Plant

Q100) Who invented Dynamo:
A) Michael Faraday
B) Gutenberg
C) Macmillan
D) Pascal