The equivalent weight of MnSO4 is half of its molecular weight, when it converts to
Răspuns
(B)
MnO2
3
In which mode of expression, the concentration of a solution remains independent of temperature?
Răspuns
(D)
Molality
4
A sample of hydrazine sulphate (N2H6SO4) was dissolved in 100 ml. of water, 10 ml of this solution was reacted with excess of ferric chloride solution and warmed to complete the reaction. Ferrous ion formed was estimated and it required 20 ml of M/50 potassium permanganate solution. Estimate the amount of hydrazine sulphate in one litre of the solution.
A sugar syrup of weight 214.2 g contains 34.2 g of sugar (C12H22O11). Calculate (i) molal concentration and (ii) mole fraction of sugar in the syrup
Răspuns
(A)
(i) 0.56, (ii) 0.0099
6
The uncertainty principle and the concept of wave nature of matter were proposed by ______ and ______ respectively. (Heisenberg Schrodinger, Maxwell, de Broglie)
Răspuns
(D)
Heisenberg, de Broglie
7
The wavelength of a spectral line for an electronic transition is inversely related to :
Răspuns
(C)
the difference in the energy of the energy levels involved in the transition
8
The outermost electronic configuration of the most electronegative element is
Răspuns
(C)
ns2 np5
9
The first ionisation potential of Na, Mg, Al and Si are in the order
Răspuns
(A)
Na < Mg > Al < Si
10
The statements that are true for the long form of the periodic table are:
Răspuns
A
B
C
D
11
The molecule that has linear structure is
Răspuns
(A)
CO2
12
The species in which the central atom uses sp2 hybrid orbitals in its bonding is
Răspuns
(C)
$$CH_3^+$$
13
Arrange the following :
N2, O2, F2, Cl2 in increasing order of bond dissociation energy
Răspuns
(B)
F2 < Cl2 < O2 < N2
14
Write down the balanced equation for the reaction when:
Carbon dioxide is passed through a concentrated aqueous solution of sodium chloride saturated with ammonia.
