MCQs

Q211: The transfer of pollen grains from anther of a flower to the stigma of the same or another flower is called?

• A) Fertilization
• B) Reproduction
• C) Pollination

Q212: Which of the following equations represents a decomposition reaction?

• A) A+B → AB
• B) A → AB
• C) AB → A+B

Q213: Which vitamin whose gene is inserted in the rice plant creating a genetically modify rice variety?

• A) Vitamin C
• B) Vitamin E
• C) Vitamin A

Q214: Which of the following harmonics is two octaves higher in pitch than the fundamental?

• A) Second
• B) Third
• C) Fourth

Q215: Pneumatic systems is (are) used in ______?

• A) Spray guns
• B) Vacuum cleaner
• C) All of these

Q216: The step which can save the earth and natural resources?

• A) Burning of fossil fuels
• B) Cut down more trees
• C) Use recycled and reusable material

Q217: The phenomenon which leads to destruction of manmade structure and metal of archaeological importance is ____?

• A) Hydrogen
• B) Oxygen
• C) Acid Rain

Q218: A Reflecting telescope consists of _____?

• A) A primary lens and A secondary lens
• B) A primary lens and A secondary mirror
• C) A primary and A secondary mirror

Q219: The fundamental frequency of a guitar is string 220 Hz, the frequency of the second harmonic is?

• A) 220 Hz
• B) 440 Hz
• C) 320 Hz

Q220: Periscope is another optical instrument that works on the principle of total ____?

• A) Refraction
• B) Diffraction
• C) Internal Reflection