NaNH2 RX Na/LiqN А * B R-C=C- H . The product 'C' is (A) R R Н. Н (B) Н. R 0 R H 20 R (C) H NH2 Н (D) NH2 R 20

R-C -= C - H overset (NaNH_2)rarr A overset (RX)rarr B overset (Na//Liq NH_3)rarr C . The "product" 'C' is.

If 20C_(r+1)=^20C_(r-1) , then r is equal to:

The value of sum_(r=0)^(20)r(20-r)( ^(20)C_r)^2 is equal to ?

{:("Column"I , "Column" II), ((A) R-overset(O)overset(||)(C)-NH_(2) rarr R-CH_(2)NH_(2) , (P) "Schmidt reaction") , ((B) R-overset(O)overset(||)(C)-NH_(2) rarr R-NH_(2) , (Q) P_(2)O_(5)) , ((C) R-overset(O)overset(||)(C)-NH_(2) to R-CN, (R) "Hofmann reaction" ), ((D) R-overset(O)overset(||)(C)-N_(3)to RNH_(2), (S) LiAlH_(4)):}

In the reaction, R-C-= N + 4 [H] overset(X)to R CH_2NH_2 X can be

R-NH_2 is the main product of reaction of RCONH_2 and [Br_2+ KOH ]. In this reaction intermediates are : (a ) RCONHBr (b ) RNHBr (c ) R-N=C=O " " (d ) RCONBr_2 Correct answer is :

R-NH_2 is the main product of reaction of RCONH_2 and [Br_2+ KOH ]. In this reaction intermediates are : (a ) RCONHBr (b ) RNHBr (c ) R-N=C=O " " (d ) RCONBr_2 Correct answer is :

In A B C ,(a b-r_1r_2)/(r_3),w h e r ea ,b ,r_1r_2, r_3, Ra n dr have usual meanings, is equal to (A) R (B) 2R (C) r (D) none of these

In A B C ,(a b-r_1r_2)/(r_3),w h e r ea ,b ,r_1r_2, r_3, Randr have usual meanings, is equal to (A) R (B) 2R (C) r (D) none of these