-
- Sulphur
- Carbon
- Silicon
- Phosphorus
Sciences MCQs
Which one of the following does not wet the walls of the glass vessel in which it is kept?
-
- Water
- Mercury
- Alcohol
- None of the above
Dialysis is used for people with defective kidneys. It involves the process of _____.
-
- Osmosis
- Diffusion
- Adsorption
- Electropheresis
Which of the following is the lightest gas?
-
- Carbon dioxide
- Ammonia
- Nitrogen
- Hydrogen
The substance coated on plastic tape-recorder tapes is _____.
-
- Zinc oxide
- Iron sulphate
- Iron oxide
- Manganese oxide
Which form of phosphorus is used in safety matches?
-
- White phosphorus
- Red phosphorus
- Yellow phosphorus
- Black phosphorus
In fireworks, the green flame is produced because of _____.
-
- Sodium
- Barium
- Mercury
- Potassium
Mixture of two metals is called _____.
-
- Alloy
- Mouse
- Hard Drive
- Dispersion
Dynamite was discovered by _____.
-
- Alfred Nobel
- Diamler
- Mosely
- Freud
Gypsum salt is _____.
-
- CaSO4, 2H2O
- CaSO4, H2O
- 2CaSO4, H2O
- CaSO4, 5H2O