Second ionization energy:
(A) is always less than first ionization energy
(B) is always greater than first ionization energy
(C) is equal to the first ionization energy
(D) may be greater or less than the first ionization energy depending on the nature of the element
Nuclear radiation is emitted by those elements whose:
(A) molecules are stable
(B) molecules are unstable
(C) nuclei are stable
(D) nuclei are unstable
Color of the glow produced in the discharge tube:
(A) depends on the pressure in the discharge tube
(B) depends on the metal used as cathode
(C) depends on the gas used in the discharge tube
(D) does not depend on the nature of the gas used in the discharge tube
Covalent network crystals have_____________
(A) higher melting point then molecular crystals
(B) lower melting point then molecular crystals
(C) discrete molecules linked by Van der waals forces
(D) hydrogen bonding
The increasing vapor pressure caused by heating a liquid is due to___________
(A) increase inter-molecular interactions
(B) increasing potential energy of molecules
(C) increasing kinetic energy of molecules
(D) decreasing surface tension
Rainfall related to mountains is:
(A) Orographic rainfall
(B) Normal rainfall
(C) Monsoon rains
(D) Cyclonic rainfall
Quantity of fresh air required for a man is 1000 cubic feet of air for every____________
(A) 5 minutes
(B) 10 minutes
(C) 15 minutes
(D) 20 minutes
Approximately, how many times each day do our heart valves open and close normally
(A) 10,000
(B) 1,00,000
(C) 1,50,000
(D) 2,00,000
The ‘stone’ formed in human kidney consist mostly of_____________
(A) Calcium oxalate
(B) Sodium acetate
(C) Magnesium sulphate
(D) Calcium
In eye donation, which one of the following parts of donor’s eye is utilized
(A) Iris
(B) Lens
(C) Cornea
(D) Retina