Temperature of a gas is t K. What would be the temperature at which volume and pressure, both will reduced to half of the initial values?
What will be the number of waves formed by a Bohr electron in one complete revolution in its second orbit?
At 27°C, one mole of an ideal gas is compressed isothermally and reversibly from a pressure of 2 atm to 10 atm. Choose the correct option from the following
Change in internal energy is positive
Heat is negative
Work done is - 965.84 cal
All are incorrect
Choose the incorrect statement about noble gas?
Boiling point increases with increasing atomic mass
Helium has least tendency to form compound
Noble gases have some value of electron affinity
Xenon has maximum number of compounds
Aqueous solution of AlCl3 is acidic towards litmus while of NaCl is not. The correct reason behind this is
AlCl3, furnishes OH- ion in the solution
AlCl3, furnishes H+ ion in the solution
AlCl3, furnishes both H+ well as OH- ion in the solution
AlCl3, is the salt of strong base and strong acid
The melting point of solid substances is directly proportional to pressure acting on them. However, ice-melts at a temperature lower than its usual melting point, when the pressure increases. This is because
ice is not a true solid
the bonds break under pressure
ice is less denser than water
pressure generates heat
Work is being performed, when a weight lifter lifts a base ball off a weight rack. This is due to
Beryllium differs in properties from other elements of its own group but shows resemblance with aluminium because of
relatively bigger ionic radius and high polarising power of Be
relatively smaller ionic radius and high polarising power of Be
relatively bigger ionic radius is the only reason behind this
None of the above
Choose the correct statement from the following
and CH4 are not isoelectronic species
BF3 does not have dipole moment
O - Cl - O obeys octet rule
O- in O3 is Sp3-hybridised
Which of the following pair of compounds will have three sp2 -hybrid orbitals?
Among all the given pairs, second pair has sp2- hybrid orbitals.
SO2 is trigonal planar. It has 3 sp2- hybrid orbitals.
CH4 is tetrahedral. It has 4 sp3- hybrid orbitals.
SO3 and C2H4 are trigonalplanar and have 3 sp2- hybrid orbitals.
BF3 is trigonal planar. It also has 3 sp2- hybrid orbitals.
SF4 is irregular tetrahedral. It has 5 sp3d hybrid orbitals.
L is linear and has 5 sp3d hybrid orbitals.