List of top Chemistry Questions asked in TS EAMCET

Formic acid on heating with concentrated H\(_2\)SO\(_4\) at 373 K gives X, a colourless substance and Y, a good reducing agent. The number of \(\sigma\) and \(\pi\) bonds in X, Y are respectively:

The IUPAC names of the compounds A and B respectively are

 

The reagent 'X' used in the following reaction to obtain a good yield of the product is: 

Which radical is responsible for depletion of ozone in stratosphere?
If the density of a mixture of nitrogen and oxygen gases at 400 K and 1 atm pressure is 0.920 g L\(^{-1}\), what is the mole fraction of nitrogen in the mixture?

The wavelength of an electron is \( 10^3 \) nm. What is its momentum in kg m s\(^{-1}\)?

Match the following: List I (Ore) List II (Composition) 
 

 A few sols are given below:
As2S3 sol, starch sol, Al2O3 ·
xH2O sol, TiO2 sol, gold sol, congo red sol, blood, methylene blue sol, CdS sol
The number of positively charged sols in the above list is:

The metal having the highest melting point among lanthanides is
Arrange the following halides in decreasing order of their reactivity towards dehydrohalogenation:
decreasing order of their reactivity towards dehydrohalogenation
In which of the following ionic pairs, the second ion is smaller in size than the first ion?

The number of -OH groups present in the structures of bithionol, terpineol, and chloroxylenol is respectively:

Which of the following does not exist?
Identify the complex ion with electronic configuration \( t_{2g}^{3} e_{g}^{2} \).

Which of the following is not correct?

(1) XeO2 is a colorless explosive gas
(2) SO2 is highly soluble in water
(3) Noble gases have very low boiling points
(4) The boiling point of sulphur is more than that of oxygen

At T(K), the equilibrium constants for the following two reactions are given below: \[ 2A(g) \leftrightarrow B(g) + C(g), \quad K = 16 \quad \text{and} \quad 2B(g) \leftrightarrow D(g), \quad K = 25. \] What is the value of the equilibrium constant (K) for the reaction given below at T(K)? \[ \frac{1}{2} A(g) \leftrightarrow \frac{1}{2} B(g) \]
An alkene \( X \) (\( C_5H_{10} \)) on reaction with \( HBr \) gave \( Y \) (\( C_5H_{11}Br \)). \( Y \) undergoes hydrolysis via an \( S_N1 \) mechanism. What is \( X \)?
Assertion (A): \( MgO, CaO, SrO, \) and \( BaO \) are insoluble in water.
Reason (R): In aqueous medium, the basic strength of \( MgO, CaO, SrO, \) and \( BaO \) increases with increase in the atomic number of the metal.
The correct option among the following is
Two statements are given below:
I. Sodium hexametaphosphate is used in calgon method for removal of permanent hardness of water
II. Lithium forms interstitial hydrides
Identify the correct answer
In group 14 elements, the element with highest melting point is X and element with lowest melting point is Y. X and Y respectively are

The major product of the following reaction is 

At 400 K, the following graph is obtained for \( x \) moles of an ideal gas. \( x \) is equal to (R = gas constant, P = pressure, V = volume)
x moles of an ideal gas

For the gaseous reaction \( \text{N}_2\text{O}_5 \rightarrow 2\text{NO}_2 + \frac{1}{2}\text{O}_2 \), the rate can be expressed as follows: 

The correct relation between \( K_1, K_2 \) and \( K_3 \) is

Consider the following reactions: \[ X + \text{O}_2 \;\longrightarrow\; \text{Cu}_2\text{O} + \text{SO}_2 \] \[ \text{Cu}_2\text{O} + 2\,\text{H}_2 \;\longrightarrow\; 2\,\text{Cu} + \text{H}_2\text{O} \] If the molecule \(Y\) is formed in the first reaction, the shape of molecule \(Y\) is:

Match the following: