Metals of the first transition series have special properties which are different from those of groups I and II elements because they have partially filled
See more
2003
Which of the following is physical change?
See more
2003
What volume of oxygen is produced from the decomposition of 2 mole of KCIO3 at s.t.p?[Molar volume of a gas at s.t.p = 22.4 dm3]
See more
2003
The noble gases owe their inactivity to
See more
2003
Neutral atoms of neon with atomic number 10 have the same number of electron as
See more
2003
3Cu + pHNO3 →3Cu(NO)2 + 4H2 O + xNOIn the equation above, the values of p and x respectively are
See more
2003
The filter in the cigarette reduces the nicotine content by
See more
2003
What is the percentage by mass of oxygen in Al2(SO4)3. 2H2O?[Al = 27, S = 32, H = 1, O = 16]
See more
2003
The weakest attractive force that can be observed between two molecules is
See more
2003
When cathode rays are deflected onto the electrode of an electrometer, the instrument becomes
See more
2003
A gas exerts pressure on its container because
See more
2003
I. H = 1s1 II. N = 1s2 2s2 p3 III. O = 1s2 2s2 p4 IV. Zn = 1s2 2s2 2p6 3s2 3p6 4s2 3d10From the above, which of the following pairs is like to be paramagnetic?
See more
2003
According to the kinetic theory, an increase in temperature causes the kinetic energy of particles to
See more
2003
What mass of K2CrO4 is required to prepare 250cm3 of 0.020 mol dm3 solution?[K2CrO4 = 194.2g mol-1]
See more
2003
A liquid that will dissolve fat is
See more
2003
The structural component that makes detergent dissolve more quickly in water than soap is
See more
2003
Which of the following ions is acidic?
See more
2003
A consequence of global warming is
See more
2003
The commonest feature of reactions at the anode is that