Arrange the following in increasing oxidation number of iodine.
I2, HI, HIO4, ICl
Answer
(D)
HI < I2 < ICl < HIO4
8
The electron density in the XY plane in 3dx2 - y2 orbital is zero
Answer
(B)
FALSE
9
Rutherford's alpha particle scattering experiment eventually led to the conclusion that:
Answer
(B)
electrons occupy space around the nucleus
10
The ratio of the energy of a photon of 2000Å wavelength to that 4000Å radiation is
Answer
(D)
2
11
Which one of the following sets of quantum numbers represents an impossible arrangement?
Answer
(C)
n = 3, l = 2, ml = -3, ms = 1/2
12
The sum of the number of neutrons and proton in the isotope of hydrogen is
Answer
(D)
3
13
Arrange the following in:
Increasing size:
Cl-, S2-, Ca2+, Ar
Answer
(C)
Ca2+ < Ar < Cl- < S2-
14
The hydrogen bond is strongest in
Answer
(C)
F - H........F
15
The hybridisation of sulphur in sulphur dioxide is
Answer
(C)
sp2
16
CO2 is isostructural with
Answer
A
C
17
Write the lewis dot structure of the following:
O3, COCl2
Answer
(B)
The image shows the Lewis dot structures for O3 and COCl2 correctly.
18
The rate of diffusion of gas is _______ proportional to both ________ and square root of molecular mass.
Answer
(D)
inversely, pressure
19
The average velocity of an ideal gas molecule at 27oC is 0.3m/sec. The average velocity at 927oC will be
Answer
(A)
0.6 m/sec
20
The softness of group I-A metals increases down the group with increasing atomic number.
Answer
(B)
FALSE
21
The pair of compound which cannot exist together in solution is:
Answer
(A)
NaHCO3 and NaOH
22
Give reasons of the following:
Hydrogen peroxide is a better oxidising agent than water.
Answer
B
C
E
23
Write the IUPAC name of :
CH3CH2CH = CHCOOH
Answer
(B)
2-Pentenoic acid
24
The vapour pressure of ethanol and methanol are 44.5 and 88.7 mm Hg respectively. An ideal solution is formed at the same temperature by mixing 60 g of ethanol with 40 g of methanol. Calculate the total vapour pressure of the solution and the mole fraction of methanol in the vapour.
