List of top Chemistry Questions asked in TS EAMCET

Which one of the following molecules has maximum number of lone pairs of electrons?

Identify the reaction in which the hybridization of the underlined atom is changed

What is the pH of $10^{-2}M$ aqueous solution of aniline at 298 K?}

Observe the following reaction and identify the correct relationships from the following \[ xP_4(s)+yOH^{-}(aq)+zH_2O(l)\rightarrow aPH_3(g)+bH_2PO_2^{-}(aq) \] I. $x+y+z=6$ II. $x=a$ III. $x+y+z=3+a+b$ IV. $a-z+b=1$

The work function $(W_0)$ of metals A, B and C is 2.25, 2.42 and 3.7 eV respectively. These metals were irradiated with light of wavelength 400 nm. Identify the metals from which photoelectrons are emitted $(h = 6.6 \times 10^{-34} Js; c = 3 \times 10^8 ms^{-1}; 1 eV = 1.6 \times 10^{-19} J)$

In a cathode ray experiment hydrogen gas was subjected to very low pressure and high voltage. The $\frac{e}{m}$ of cathode rays liberated was $-x~C~kg^{-1}$. In the second experiment helium gas was used under the same experimental conditions. What is the $\frac{e}{m}$ $(in~C~kg^{-1})$ of cathode rays liberated in the second experiment?}

Consider the following ions

. The largest cation and largest anion are respectively}

The atomic numbers of four elements A, D, E, G are 4, 7, 8, 12 respectively. The decreasing order of electronegativity of these elements is

Identify correct set(s) of X, Y, Z in the following reaction sequence. \[ Styrene \xrightarrow{(C_6H_5CO)_2O_2, HBr} Product \xrightarrow{(ii)X} \xrightarrow{(iii)Y} Z \]

What are C and E in the following reaction sequence?

Which of the following statements about \(C_6H_5N_2BF_4\) are correct? I. With NaF gives \(C_6H_5F\) II. With NaNO\(_2\)/Cu gives \(C_6H_5NO_2\) III. On heating gives \(C_6H_5F\) IV. With HNO\(_3\) gives \(C_6H_5NO_2\)

Natural rubber is the addition polymer of monomer X and neoprene is the addition polymer of monomer Y. What are X and Y respectively?

What are X, Y, Z in the following reactions?

The detergent used in tooth pastes is 'X' and in hair conditioners is 'Y'. What are X and Y respectively?

Glycosidic linkage in maltose is present between

Rate determining step in the following reactions I and II respectively is

Benzene gets converted to X in reaction (A) and Y in reaction (B). X is oxidized by ammoniacal AgNO\(_3\) but Y is not. Identify A and B.

Match the following orders with their properties.

The metal refined by Mond process is X and the metal refined by Van Arkel method is Y. What are X and Y respectively?

What are X and Y in the following reactions? \[ 2X_2(g)+2H_2O(l)\rightarrow4H^+(aq)+4X^-(aq)+O_2(g) \] \[ Y_2(g)+H_2O(l)\rightarrow HY(aq)+HOY(aq) \]

Observe the following reactions

Which are common for both Y and W? I. Four P-OH bonds II. Two P-H bonds III. Two \(P=O\) bonds IV. One P-O-P bond

In which of the following sets, the reaction and catalyst are correctly matched?

Which of the following exhibit optical isomerism? I. \([Fe(C_2O_4)_3]^{3-}\) II. \([Cr(H_2O)_4Cl_2]^+\) III. \([Co(NH_3)_2(en)_2]^{3+}\)

Identify the edge lengths \((a,b,c)\) in the unit cell shown below.

Observe the reaction sequence

Compound A forms sodium derivative with \(NaNH_2\). Find B and D.