Atomicity of nitrogen is __________.

(a)

1

(b)

2

(c)

3

(d)

Zero

The maximum number of electrons in a sub shell is given by the expression _____________

(a)

 2n²

(b)

2l + 1

(c)

4l + 2 

(d)

none of these

Consider the following statements.
(i) The region where the probability density of electron is zero, called nodal surface.
(ii) The probability of finding the electron is independent of the direction of the nucleus.
(iii) The number of radial nodes is equal to n + 1+ 1
Which of the above statements is/are correct?

(a)

(i) and (iii)

(b)

(i) and (ii)

(c)

(iii) only

(d)

(i) and (iii)

Pd has exceptional electronic configuration of 4d¹⁰ 5s⁰ It belongs to period ______ and group _____

(a)

4, 11

(b)

5, 10

(c)

6, 9

(d)

3, 16

Find the incorrect statement.

(a)

Smallest atom of periodic table is He

(b)

p-block elements are metals, nonmetals and metalloids

(c)

Noble gases have 8 valence electrons except He

(d)

Valence electron and valency is same for group I

Which one of the following is the first transition series?

(a)

Sc

(b)

Zn

(c)

Ti

(d)

Cu

Which one of the following is not an isoelectronic ion?

(a)

Na⁺

(b)

Mg²⁺

(c)

Cl^-

(d)

O^2-

Among all the elements which one has the highest value of electronegativity?

(a)

Chlorine

(b)

Bromine

(c)

Fluorine

(d)

Iodine

Which of the following is arranged in order of increasing radius?

(a)

K⁺ _(aq) < Na⁺ _(aq) < Li⁺ _(aq)

(b)

K⁺ _(aq) > Na⁺ _(aq) > Zn⁺ _(aq)

(c)

K⁺ _(aq) > Li⁺ _(aq) > Na⁺ _(aq)

(d)

Li⁺ _(aq) < Na⁺ _(aq) < K⁺ _(aq)

The element with highest electron affinity belongs to___________.

(a)

period 1 group 1

(b)

period 3 group 17

(c)

period 2 group 17

(d)

period 2 group 16

Deuterium consist of _____________

(a)

one electron, two proton, three neutron

(b)

one electron, one proton, one neutron

(c)

two electron, one proton, one neutron

(d)

three electron, two proton, one neutron

The conversion of atomic hydrogen to dihydrogen is a __________ change.

(a)

endothermic

(b)

exothermic

(c)

photochemical

(d)

nuclear

Match the list Iwith List IIand select the correct answer using. the code given below the lists.

List I		List II
A	H2O2	1	SiH4
B	D2O	2	PdH
C	Metallic hydride	3	Bleach
D	Molecular hydride	4	Study of reaction mechanism

(a)

A	B	C	D
1	3	2	4

(b)

A	B	C	D
4	3	1	2

(c)

A	B	C	D
3	4	2	1

(d)

A	B	C	D
2	1	4	3

H₂O₂ is a ________ acid.

(a)

mono basic

(b)

di basic

(c)

tri basic

(d)

none

Which of the following is used in illumination of wrist watches?

(a)

Phosphorous

(b)

Radon

(c)

Tritium

(d)

Deuterium

Metallic hydrides are otherwise called _______

(a)

Salt hydrides

(b)

Saline hydrides

(c)

molecular hydrides

(d)

Interstitial hydrides

Change in internal energy, when 4 kJ of work is done on the system and 1 kJ of heat is given out by the system is ______________

(a)

+1 kJ

(b)

- 5 kJ

(c)

+3 kJ

(d)

- 3 kJ

Consider the reaction where K_P = 0.5 at a particular temperature
PCl₅(g) ⇌ PCl₃ (g) + Cl₂ (g)
if the three gases are mixed in a container so that the partial pressure of each gas is initially 1 atm, then which one of the following is true ____________

(a)

more PCl₃ will be produced

(b)

more Cl₂ will be produced

(c)

more PCl₅ will be produced

(d)

none of these

The Henry's law constant for the solubility of Nitrogen gas in water at 350 K is 8 x 10⁴ atm. The mole fraction of nitrogen in air is 0.5. The number of moles of Nitrogen from air dissolved in 10 moles of water at 350K and 4 atm pressure is ____________

(a)

4 x 10^-4

(b)

4 x 10⁴

(c)

2 x 10^-2

(d)

2.5 x 10^-4

Which of the following is electron deficient ?

(a)

PH₃

(b)

(CH₃)₂

(c)

BH₃

(d)

NH₃

Non- Zero dipole moment is shown by __________

(a)

CO₂

(b)

p-dichlorobenzene

(c)

carbontetrachloride

(d)

water

 are ____________

(a)

resonating structure

(b)

tautomers

(c)

Optical isomers

(d)

Conformers

The geometrical shape of carbocation is ______________.

(a)

Linear

(b)

tetrahedral

(c)

Planar

(d)

Pyramidal

Which of the following compounds will give racemic mixture on nucleophilic substitution by OH- ion?

(a)

(i)

(b)

(ii) and (iii)

(c)

(iii)

(d)

(i) and (ii)

Haemoglobin of the blood forms carboxy haemoglobin with __________.

(a)

Carbon dioxide

(b)

Carbon tetra chloride

(c)

Carbon monoxide

(d)

Carbonic acid