A 40 watt electric bulb is used 6 hours every day. The number of electric units it consumes in 30 days are:

• (a) 12
• (b) 1.2
• (c) 2.4
• (d) 7.2

In nuclear fission of U²³⁵ with a slow neutron bombardment produces energy approximately:

• (a) 50 MeV
• (b) 100 MeV
• (c) 200 MeV
• (d) 930 MeV

The dental alloy used for teeth filing contains:

• (a) Silver, mercury, tin, copper and zinc
• (b) Silver, gold, tin, copper and zinc
• (c) Silver, mercury, tin, copper and aluminium
• (d) Gold, Mercury, tin, copper and zinc

Which one of the following substances is not responsible for water hardness?

• (a) Calcium carbonate
• (b) Magnesium carbonate
• (c) Calcium nitrate
• (d) Calcium hydrogen nitrate

The different plant parts in which leucoplasts present are:

• (a) Roots and underground stem
• (b) Green leaves
• (c) Flowers and fruits
• (d) Green parts of young stems

Pteridophyta do not have:

• (a) Leaves
• (b) Stem
• (c) Roots
• (d) Flowers

In which group of animals, coelom is filled with blood?

• (a) Annelida
• (b) Arthropoda
• (c) Nematoda
• (d) Echinodermata

Lack of oxygen in muscles often leads to cramps among athletes. The reason for this is:

• (a) Conversion of pyruvate to ethanol
• (b) Conversion of pyruvate to lactic acid
• (c) No-conversion of glucose to pyruvate
• (d) Conversion of pyruvate to glucose