1.

Which of the following is correct?

• Ionic radius is proportional to atomic number.

• Ionic radius is inversely proportional to atomic mass.

• Ionic radius is inversely proportional to effective nuclear charge.

• All are correct.

Equal weight of CO and CH₄ are mixed together in an empty container at 300 K. The fraction of total pressure exerted by CH₄ is.

• $\frac{16}{17}$

• $\frac{7}{11}$

• $\frac{8}{9}$

• $\frac{5}{16}$

In the ground state of Cu²⁺ the number of shells occupied, subshells occupied, filled orbitals and unpaired electrons respectively are

• 4, 8, 15 0

• 3, 6, 15, 1

• 3, 6, 14, 0

• 4, 7, 14, 2

CaO and NaCl have the same crystal structure and approximately the same ionic radii. If U is the lattice energy ofNaCI, the approximate lattice energy of CaO is

• U/2

• U

• 2U

• 4U

Two flasks X and Y have capacity 1L and 2L respectively and each of them contains 1 mole of a gas. The temperatures of the flasks are so adjusted that average speed of molecules in X is twice as those in Y. The pressure in flask X would be

• same as that in Y

• half of that in Y

• twice of that in Y

• 8 times ofthat in Y

Match List I with List II and select the correct answer using the codes given below the lists:

List I	List II
A. $(\frac{\mathrm{\delta G}}{\mathrm{\delta P}}{)}_{\mathrm{T}}$	1.  ${\mathrm{\mu }}_{\mathrm{\pi }}$
B. $(\frac{\mathrm{\delta G}}{\mathrm{\delta T}}{)}_{\mathrm{P}}$	2.  T
C. $(\frac{\mathrm{\delta H}}{\mathrm{\delta S}}{)}_{\mathrm{P}}$	3. -S
D. $(\frac{\mathrm{\delta T}}{\mathrm{\delta P}}{)}_{\mathrm{H}}$	4. P
	5. V

• A-5, B-1, C-2, D-4

• A-5, B-3, C-2, D-4

• A-3, B-5, C-2, D-1

• A-5, B-3, C-2, D-1

What is the pH of0.01 M glycine solution? For glycine K_a1= 4.5x10^-3 and K_a2=1.7x10^-10 298 K.

• 3.0

• 10.0

• 7.06

• 8.2

Which ofthe following sequence contains atomic number of only representative elements?

• 55,12,48,53

• 13,33,54,80

• 3,33,53,87

• 22,33,55,66.

100 cm³ of a given sample of H₂O₂ gives 1000 cm³ of O₂ at S.T.P. The given sample is

• 10% H₂O₂

• 90% H₂O₂

• 10 volume H₂O₂

• 100 volume H₂O₂

Beryllium and aluminium exhibit many properties which are similar. But the two elements differ in

• maximum covalency in compounds

• exhibiting amphoteric nature in their oxides

• forming covalent halides

• forming polymeric hydrides