Step 1: Understanding the reaction.
When formic acid is treated with concentrated sulfuric acid, it undergoes dehydration to form carbon monoxide (CO) and water.
Step 2: Analyzing the options.
(A) CO + H2O: Correct, formic acid undergoes dehydration to produce carbon monoxide and water.
(B) CO2 + H2: Incorrect, as this is not the product of the reaction.
(C) HCHO + ½ O2: Incorrect, as this is not the correct product of the reaction.
(D) no product (no reaction): Incorrect, a reaction occurs and produces carbon monoxide and water.
Step 3: Conclusion.
The correct answer is (A) CO + H2O.
One mole of a monoatomic ideal gas starting from state A, goes through B and C to state D, as shown in the figure. Total change in entropy (in J K\(^{-1}\)) during this process is ............... 
The number of chiral carbon centers in the following molecule is ............... 
A tube fitted with a semipermeable membrane is dipped into 0.001 M NaCl solution at 300 K as shown in the figure. Assume density of the solvent and solution are the same. At equilibrium, the height of the liquid column \( h \) (in cm) is ......... 
An electron at rest is accelerated through 10 kV potential. The de Broglie wavelength (in A) of the electron is .............