The `k_beta` X-rays from certain elements are given below. Draw a Moseley-type plot of `sqrt v versus Z for `K_beta` radiation
Element Ne P Ca Mn Zn Br
Energy (keV) 0*858 2*14 4*02 6*51 9*57 13*3.

The electronegativity for some elements on pauline scale of different groups and periods are listed below. Plot these values against atomic number. From the pattern, explain the variation along a period and a group. 2^nd group elements : Be (1.6), Mg (1.2). Ca (1.0), Sr (1.0) Ba(0.9) 17^(th) group elements : F (4.0), CI (3.0), Br (2.8). I (2.5) 3^rd Period elements : Na(0.9), Mg(1.2), AI (1.5), Si(1.8), P(2.1), S(2.5), CI(3.0) 4^th period elements : K(0.8), Ca(1.0). Sc(1.3), Ti(1.5), V(1.6), Cr(16), Mn(1.5), Fe(1.8). Co(1.9), Ni(1.9). Cu(1.9). Zn(16), Ga(16), Ge(1.8), As(2.0), Se(2.4), Br(2.8)

Read the given letter number sequence carefully and answer the question given below: J K P D F G H 6 9 2 8 Q E M 7 4 3 Z Y B T 5 4 2 3 In the arrangement P 2 6 M 9 K S 4 V 7, the positions of the first and the sixth elements are interchanged, those of the second and the seventh are interchanged and so on. Then, which of the given will be the fourth element from the left end in the fresh arrangement? 1) M 2) 7 3) 4 4) 9 5) None of these

Covalent radii (in A) for some elements of different groups and periods are listed below. Plot these values against atomic number. From the plot, explain the variation along a period and a group. 2^nd group elements : Be (0.89), Mg (1.36), Ca (1.74), Sr (1.91) Ba(1.98) 17^th group elements : F (0.72), CI (0.99), Br(1.14). T (1.33) 3^rd Period elements : Na(1.57), Mg(1.36). AI (1.25), Si(1.17). P(1.10), S(1.04). C1(0.99) 4^th period elements : K(2.03), Ca(1.74). Sc(1.44). Ti(1.32), V(1.22), Cr(1.17), Mn(1.17) Fe(1.17). Co(1.16). Ni(1.15). Cu(1.17). Zn(1.25), Ga(1.25). Ge(1.22). As(1.21). Se(1.14). Br(1.14)

Which element is the fifth to the right of the twelfth element from the right end of the arrangement? T 7 4 A G H K # 5 Q R % 2 3 D F * L M 6 B E 8 @ 1 $ P V 9

Read the given letter number sequence carefully and answer the question given below: J K P D F G H 6 9 2 8 Q E M 7 4 3 Z Y B T 5 4 2 3 In the arrangement of letters and numbers given below, first all the numbers are arranged in the descending order and then all the letters are written in the alphabetical order. Then which letter/ number will be fourth to the left of the 11th element from the left end in the new arrangement? 1) K 2) 3 3) B 4) 1 5) None of these

Continuous X-rays are made to strike a tissue paper soaked with polluted water. The incoming X-rays excite the atoms of the sample by knocking out the electrons form the inner shells. Characteristic X-rays are subsequently emitted. The emitted X-rays are analysed and the intensity is plotted against the wavelength (figure 44*E1). Assuming that only K_alpha intensities are detected, list the elements present in the sample from the plot. Use Moseley's equation. v = (25 xx 10^(14) Hz) (Z - 1)^(2) .

Read the given letter number sequence carefully and answer the question given below: J K P D F G H 6 9 2 8 Q E M 7 4 3 Z Y B T 5 4 2 3 If all. the. odd numbers are dropped from the above sequence which of the given elements would be seventh to the right of twelfth element from the right? 1) B 2) Z 3) Y 4) 4 5) None of these

The behaviour of ideal gas is goverened by various gas laws which are described by mathematical statements as given below: ( i ) PV=k (constant) at constant n and T ( ii ) V//T=k_(2) (constant) at constant n and P ( iii ) V//n=k_(3) (constant) at constant T and P ( iv ) PV=nRT ( v ) P//T=k_(4) (constant) at constant n and V Answer the following If we plot a graph between volume ( L ) and temperature ( ^(@)C ) by studying their variation for 2.0 g of certain ideal gas at 1 bar pressure, the graph obtained is a straight line which is

The behaviour of ideal gas is goverened by various gas laws which are described by mathematical statements as given below: ( i ) PV=k (constant) at constant n and T ( ii ) V//T=k_(2) (constant) at constant n and P ( iii ) V//n=k_(3) (constant) at constant T and P ( iv ) PV=nRT ( v ) P//T=k_(4) (constant) at constant n and V Answer the following If we plot a graph between volume ( L ) and temperature ( -273.15^(@)C ) by studying their variation for 2.0 g of certain ideal gas at 1 bar pressure, the graph obtained is a straight line which is