Which of the following is the lightest substance?

Related Mcqs:

1. lightest metal is__________?

   A. Lithium
   B. Sodium
   C. Magnesium
   D. Aluminium

   Submitted by: Junaid Amjad

2. Of the six noble gases in the periodic table, which is the lightest?

   A. Nitrogen
   B. Hydrogen
   C. Helium
   D. Oxygen

   Submitted by: Ashfaque Ali Khoso

3. Which of the following is a substance?

   A. Sea water
   B. Brass
   C. Tape water
   D. Graphite
   E. Sand

   Submitted by: Mansoor Ul Haque

4. Which of the following is the hardest substance?

   A. Copper
   B. Diamond
   C. Iron
   D. Silicon

   Submitted by: ABDUL HAYEE

5. The most densest substance on the Earth is __________.

   A. Platinum
   B. Copper
   C. Steel
   D. Osmium

6. A substance which increases the efficiency of a catalyst is termed as:

   A. Promoter
   B. Activator
   C. Retarder
   D. Super catalyst

   Submitted by: Mansoor Ul Haque

7. The property of a substance to absorb moisture from the air on exposure is called____________?

   A. osmosis
   B. deliquescence
   C. efflorescence
   D. desiccation

   Submitted by: WIQAR AHMAD

8. Which is the hardest substance in the human body?

   A. Tooth enamel
   B. Skull
   C. Knee cap
   D. Rib

   Submitted by: ABDUL HAYEE

9. Substance used in match sticks ?

   A. Sulphur
   B. Zinc
   C. Acid
   D. Phosphorus

   Submitted by: Mansoor Ahmed Suhag

10. Substance whose atoms can be split are known as __________ materials.

    A. Fusionable
    B. Fissionable
    C. Combustible
    D. None of these

    Submitted by: Rashid Mehmood