Most commonly used bleaching agent is
alcohol
chlorine
sodium chloride
carbon dioxide
B.
chlorine
It is easy to burst a gas-filled balloon with a needle than with a nail. It is because
nail is more longer than needle
needle exerts more pressure than nail on the balloon
gas is reactive with the needle
nail exerts more pressure than needle on the balloon
Hydrogen peroxide is an effective sterilizing agent. Which one of the following product results when it readily loses active oxygen?
Water
Hydrogen
Nasant Hydrogen
Ozone
Match the following:
List I | List II |
A. Ascorbic Acid | 1. Photosynthetic pigment |
B. Chlorophyll | 2. Quencher |
C. Carotenoid | 3. Enzyme |
D. Superoxide dismutase | 4. Vitamin-C |
A - 2, B - 4, C - 1, D - 3
A - 4, B - 4, C - 1, D - 3
A - 4, B - 1, C - 3, D - 2
A - 4, B - 1, C - 2, D - 3
Which of the following can be found as pollutants in the drinking water in some parts of Indians?
1. Arsenic 2. Sorbitol
3. Fluoride 4. Formaldehyde
5. Uranium
Select the correct answer using the code given below.
1 and 3
2, 4 and 5
1, 3 and 5
All of these
Steel is more elastic than rubber because it
is deformed very easily
is harder than rubber
required larger deforming force
is never deformed
Acceptable 'Noise Pollution Level' in India range between
70 - 100 db
10 - 15 db
16 - 35 db
40 - 45 db
What happens when a drop of glycerol is added to crushed KMnO4 spread on a paper?
The paper ignites
There is a crackling sound
There is a violent explosion
There is no reaction