In order to prevent oxidation of potato chips during storage in sealed bags, chip manufacturers seal the packet in the presence of:

• (a) Oxygen
• (b) Nitrogen
• (c) Hydrogen
• (d) Carbon dioxide

Where from is litmus dye extracted?

• (a) A lichen
• (b) A liverwort
• (c) A moss
• (d) A pteridophyte

If someone is suffering from the problem of acidity after overeating, what is the remedy?

• (a) Lemon juice
• (b) Vinegar
• (c) Baking soda
• (d) Blue berry juice

Which of the following has a pH of about 10?

• (a) Gastric juice
• (b) Blood
• (c) Milk of magnesia
• (d) Sodium

Which of the following processes does not take place during photosynthesis?

• (a) Absorption of light energy by chlorophyll
• (b) Conversion of light to chemical energy
• (c) Splitting of water molecules into hydrogen and oxygen
• (d) Chlorophyll degradation

Which of the following instruments is used for measuring the depth of the ocean?

• (a) Galvanometer
• (b) Ammeter
• (c) Barometer
• (d) Fathometer

Light year is a unit of:

• (a) Light
• (b) Time
• (c) Intensity of light
• (d) Astronomical distance

Which of the following are the primary colors?

• (a) Yellow, green, Blue
• (b) Red, Green, Blue
• (c) Red, Green, White
• (d) Red, Magenta, Blue

Nail polish remover contains:

• (a) Benzene
• (b) Acetone
• (c) Acetic acid
• (d) Petroleum ether

The most abundant rare gas in the atmosphere is:

• (a) Helium
• (b) Neon
• (c) Xenon
• (d) Argon