class 11

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JEE Main

Consider the following ionization enthalpies of two elements ‘A’ and ‘B’. Which of the following statements is correct?

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The number of values of k, for which the system of equations$(k+1)x+8y=4k$$kx+(k+3)y=3k−1$has no solution, is

If the equations $x_{2}+2x+3=0$and $ax_{2}+bx+c=0,a,b,c∈R$, have a common root, then $a:b:c$is

If $α,β=0$, and $f(n)=α_{n}+β_{n}$and \displaystyle{\mid}{3}{1}+{f}

Match the catalysts to the correct processes : $Catalyst(A) TiCl_{3}(B) PdCl_{2}(C) CuCl_{2}(D) V_{2}O_{5} Process(i)Wacker process(ii)Ziegler - Natta polymerization(iii)Contact process(iv)Deacon’s process $

Which of the following compounds is not an antacid ?

A compound with molecular mass 180 is acylated with $CH_{3}COCl$ to get a compound with molecular mass 390. The number of amino groups present per molecule of the former compound is:

If the number of terms in the expansion of $(1−x2 +x_{2}4 )_{n},x=0,$is 28, then the sum of the coefficients of all the terms in this expansion, is :

In which of the following reactions $H_{2}O_{2}$ acts as a reducing agent ?