Which of the following is the most toxic gas?

Related Mcqs:

1. Which metal is non toxic in nature?

   A. Silver
   B. Iron
   C. Copper
   D. Gold

   Submitted by: Malik Asghar Hussain

2. The gas, commonly known as “laughing gas”, is

   A. Carbon Dioxide
   B. Sulfur Dioxide
   C. Nitrous Oxide
   D. Sodium Oxide

3. Which of the gas is not known as green house gas?

   A. Methane
   B. Nitrous oxide
   C. Carbon dioxide
   D. Hydrogen

   Submitted by: Farjan Ahmed Soomro

4. As comets get close to the sun, they start to “melt” and release gas and dust. This gas and dust forms what?

   A. “coma” around the comet’s nucleus and a long tail that points away from the sun
   B. “coma” that points away from the sun and a long tail around the comet’s nucleus
   C. Only “coma” around the comet’s nucleus
   D. Only a long tail that points away from the sun

   Submitted by: Muhammad Abdullah

5. Laughing gas has chemical composition of following two elements ?

   A. Nitrogen + Hydrogen
   B. Nitrogen + Carbon
   C. Nitrogen + Oxygen
   D. Oxygen + Carbon
   E. None of these

6. Which one of the following is also called Stranger Gas?

   A. Neon
   B. Argon
   C. Xenon
   D. Nitrous oxide

   Submitted by: ABDUL HAYEE

7. Which of the following mixture of gases is required in gas welding?

   A. Oxygen and ethylene
   B. Oxygen and hydrogen
   C. Acetylene and oxygen
   D. Acetylene and hydrogen

   Submitted by: Ashfaque Ali Khoso

8. When an acid reacts with a metal, which one of the following gas is usually liberated?

   A. Ammonia Gas
   B. Chlorine
   C. Oxygen
   D. Hydrogen gas

   Submitted by: Rashid Mehmood

9. The gas heater gives us heat by __________?

   A. Radiation
   B. Conduction
   C. Convection
   D. Environmental pressure

   Submitted by: Mansoor Ahmed Suhag

10. What is the third most common gas found in the air we breathe ________ ?

    A. Hydrogen
    B. Neon
    C. Carbondioxide
    D. Argon

    Submitted by: Rashid Mehmood