Cadmium rods are used for which purpose?
emit electrons
absorb neutrons
emit neutrons
absorb electrons
B.
absorb neutrons
Cadmium rods are used to absorb neutrons in nuclear reactors, because cadmium is neutron absorber.
The transition metals mostly are
paramagnetic
diamagnetic
both 'a' and 'b'
neither diamagnetic nor paramagnetic
What is the effect of dilution on the equivalent conductance of strong electrolyte?
Decrease on dilution
Remains unchanged
Increase on dilution
None of the above
Which one of the following molecules undergoes polymerisation to form natural rubber?
Styrene
2-methyl-1, 3-butadiene
Ethylene
Iso-butene
An asymmetric carbon atom is which
attached three atoms or groups are different
attached all the atoms or groups are different
attached two atoms or groups are different
attached all the atoms or groups are the same
Which of following is the correct order of increasing reactivity?
RCOOR' < RCOCl < RCONH2
RCOOR' < RCONH2 < RCOCl
RCOCl < RCONH2 < RCOOR'
RCONH2 < RCOOR' < RCOCl
What is the name of reaction when benzaldehyde changes in to benzyl alcohol?
Cannizzaro's reaction
Wurtz reaction
Kolbe reaction
Friedel-Craft's reaction