Lec 10 Application of Mole विलयन एवं सान्द्रता , 11th Chemistry

In a row A is at the 11th position from the left and B is 10th from the right. If they inter-changed positions A becomes 18th from the left. How many persons are there in that row?

Half - life period of the radioactive element A is 10 days. Amount of A left on the end of 11th day staring with 1 mole A is ((1)/(2))^((n+6)/(10)) mole. What is the value of n.

The average of 11 numbers is 10.8. If the average of the first six be 10.4 and that of the last six is 11.5, then the middle (6th) number is

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NEET 2020 Revision In 60 Days | Class 11 Mole Concept | Quick Revision | NEET Chemistry

A cricket player after playing 10 tests scored 100 runs in the 11th test. As a result, the average of his runs is increased by 5. The present average of runs is

Read the following information carefully to answer the questions that follow. In a survey of 25 students, it was found that 15 have taken Mathematics. 12 have taken Physics and 11 taken Chemistry, 5 have taken Mathematics and Chemistry, 9 have taken Mathematics and Physics, 4 have taken Physics and Chemistry and 3 have taken all the three subjects. The number of students who have taken only two subjects, is (a)7 (b)8 (c)9 (d)10

In the expansion of (x+y)^(n) , if the exponent of x in second term is 10, what is the exponent of y in 11th term.

Write the expression a_n-a_k for the A.P. a, a+ d, a + 2d.........., Hence, find the common difference of the A.P. for which (i) 11th term is 5 and 13th term is 79 (ii) a_10- a_5 =200 (ii) 20th term is 10 more than the 18th term.

If the ratio of the 11^(th) term of an AP to its 18^(th) term is 2 : 3 , find the ratio of the sum of the first five terms to the sum of its first 10 terms.