Following are the representative wavelengths in the infrared, ultra-violet and X-ray regions of the electromagnetic spectrum : 1.0 10-6 m, 1.0 10-8 m and 1.0 10-10 m. Which of the following statements is false? |
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(a) |
The corresponding frequencies of X-ray, UV and IR are in the ratio of 104: 102 :1 |
(b) |
The corresponding energies of X-ray, UV and IR are in the ratio of 1: 10-2: 104 |
(c) |
The corresponding velocities of X-ray, UV and IR are in the ratio of 1: 102 :104 |
(d) |
X-rays, UV and IR waves are electromagnetic waves. These are transverse waves |
Following are the representative wavelengths in the infrared, ultra-violet and X-ray regions of the electromagnetic spectrum : 1.0 10-6 m, 1.0 10-8 m and 1.0 10-10 m. Which of the following statements is false? |
|||
(a) |
The corresponding frequencies of X-ray, UV and IR are in the ratio of 104: 102 :1 |
(b) |
The corresponding energies of X-ray, UV and IR are in the ratio of 1: 10-2: 104 |
(c) |
The corresponding velocities of X-ray, UV and IR are in the ratio of 1: 102 :104 |
(d) |
X-rays, UV and IR waves are electromagnetic waves. These are transverse waves |
The corresponding velocities of X-ray, UV and IR are in the ratio of 1: 102 :104
An atom has 2K, 8L and 5M electrons. Choose the correct statements regarding it. (i) Trivalent anion of this atom will have 12 protons in its nucleus. (ii) Trivalent cation of this atom will have six p-electrons in it. (iii) This atom forms an amphoteric oxide of formula X2 O3. (iv) One of its allotrope is tetraatomic(X4). |
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(a) |
(i) and (ii) |
(b) |
(ii) only |
(c) |
(ii) and (iii) |
(d) |
(ii) and (iv) |
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