According to Moseley, a straight-line graph is obtained on plotting-
1. The frequencies of characteristic X-rays of elements against their atomic numbers.
2. The square of the frequencies of characteristic X-rays of elements against their atomic numbers
3. The square root of the frequencies of characteristic X-rays of elements against their atomic numbers
4. The reciprocal of the frequencies of characteristic X-rays of elements against their atomic numbers.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe tenth element in the periodic table resides in:
1. the second period
2. the fourth period
3. the fifth period
4. the eight period
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following order is not in accordance with the property stated against it?
1. F2 > Cl2 > Br2 > l2 Oxidising Power
2. Hl > HBr >HCl >HF Acidic property in water
3. F2 > Cl2 > Br2 > l2 Electronegativity
4. F2 > Cl2 > Br2 > l2 Bond dissociation energy
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAn element X occurs in short period having configuration ns2np1 . The formula and nature of its oxide are:
1. XO3, basic
2. XO3, acidic
3. X2O3, amphoteric
4. X2O3, basic
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe outermost electronic configuration of the most electronegative element is :
1. ns2np3
2. ns2np4
3. ns2np5
4. ns2np6
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe elements X, Y, Z and J have the indicated electron configurations starting with the innermost shell. The most metallic element is :
1. X = 2, 8, 3
2. Y = 2, 8, 8
3. Z = 2, 8, 8, 1
4. j = 2, 8, 8, 7
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich statement is true?
1. The electronegative nature of elements increases along the period
2. The electropositive nature of elements increases along the period
3. The chemical reactivity of elements increases along the period
4. The I.E of element decreases along the period
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe most non-metallic element among the following is:
1. Be
2. B
3. Mg
4. Al
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology58Ce is a member of which block?
1. s-block elements.
2. p-block elements.
3. d-block elements.
4. f-block elements.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe screening effect of 'd' electrons is:
1. Much less than s-electrons.
2. Much more than s-electrons.
3. Equal to s-electrons.
4. Equal to p-electrons.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology