Which of the following is the hardest substance?

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

Submitted by: ABDUL HAYEE

Which is the hardest substance in the human body?
A. Tooth enamel B. Skull C. Knee cap D. Rib Submitted by: ABDUL HAYEE...
Which of the following is a substance?
A. Sea water B. Brass C. Tape water D. Graphite E. Sand Submitted by: Mansoor Ul Haque...
Which of the following is the lightest substance?
A. Uranium B. Hydrogen C. Oxygen D. Nitrogen Submitted by: Irfan...
The most densest substance on the Earth is __________.
A. Platinum B. Copper C. Steel D. Osmium...
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...
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...
Substance used in match sticks ?
A. Sulphur B. Zinc C. Acid D. Phosphorus Submitted by: Mansoor Ahmed Suhag...
Substance whose atoms can be split are known as __________ materials.
A. Fusionable B. Fissionable C. Combustible D. None of these Submitted by: Rashid Mehmood...
When sound waves travel from air to water which of the following quantities remains unchanged?
A. Speed B. Frequency C. Intensity D. Wavelength Submitted by: Rashid Mehmood...
Which of the following is the study of micro- organisms, mostly viruses and single called organisms such as bacteria, yeasts and protozoa ?
A. Microbiology B. Micrology C. Histopathology D. Tavelogy Submitted by: Rashid Mehmood...