Chemistry-
General
Easy
Question
Which has the smallest size
- (a)
- (c)
The correct answer is:
As the nuclear charge per electron is maximum in . Therefore its size is smallest
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The 120 permutations of MAHES are arranged in dictionary order, as if each were an ordinary five-letter word. The last letter of the 86th word in the list is
The 120 permutations of MAHES are arranged in dictionary order, as if each were an ordinary five-letter word. The last letter of the 86th word in the list is
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Let y be an element of the set A = {1, 2, 3, 5, 6, 10, 15, 30} and x1, x2, x3 be integers such that x1 x2 x3 = y, then the number of positive integral solutions of x1 x2 x3 = y is
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How many 6 digit number can be formed using the digit 1, 2, 3, 4, 5 and 6 that have at least two of the digits the same:
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Value of 4C3 + 5C3 + 6C3 ....... + 11C3 + 12C3 equal to
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A double decker bus can have (u + ) passengers, u in the upper deck and in the lower deck. The number of ways in which the (u + ) passengers can be distributed in the two decks. If r( ) particular passengers refuse to go in the upper deck and s(u) refuse to sit in the lower deck, is/are -
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The no. of ways in which n2 identical balls can be put in n numbered boxes (1, 2, 3, ……, n) such that ith box contains at least i number of balls is-
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The number of 3 digit odd numbers divisible by 3, using the digits 3, 4, 5, 6 when repetition is allowed, is
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There are three coplanar parallel lines. If any n points are taken on each of the lines, the maximum number of triangles with vertices at these points will be
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The number of ways to give 16 different things to three persons A, B, C so that B gets 1 more than A and C gets 2 more than B, is -
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A determinant of second order is made with the element 0 and 1. The number of determinants with non negative values is –
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