The main function of phloem in plants is to

• translocate food material

• repair the injured parts

• transport water

• help in transpiration

Recently discovered most stable allotropes of carbon is

• C₁₆

• C₆₀

• C₂₀

• C₅₆

Which among the following is amphoteric oxide?

• SnO₂

• CaO

• SiO₂

• CO₂

The symbiotic association of algae and fungi is

• funaria

• lichen

• Marchantia

• riccia

Two magnetic lines of force

• intersect at the neutral point

• intersect near North or South pole

• cannot intersect at all

• intersect according to the position of magnet

For which colour of light the focal length of a lens will be maximum?

• Violet

• Blue

• Red

• Yellow

Name an acid used for removing ink stains

• Oxalic acid

• Acetic acid

• Formic acid

• Malic acid

Natural fibers are

• cotton

• wool

• silk

• All of these

69.

The composition percentage of CaO and SiO₂ in Portland cement is

• 40-45% and 10-15%

• 85-90% and 40-45%

• 60-68% and 17-24%

• 3-10% and 80-90%

Asteroids are found in between the orbits of

• Saturn and Jupiter

• Mars and Jupiter

• Earth and Mars

• Saturn and Uranus