List of top Chemistry Questions asked in AP EAMCET

What are X and Y respectively in the following set of reactions?

What are X and Y respectively in the following reactions?

A ketone ‘X’ gives CH$_3$ when reacted with NaOI. The product of X on reaction with NaBH$_4$ followed by treatment with H$_2$O is:

The correct sequence of enzymes involved in the commercial production of ethanol by fermentation from sugar is:

Observe the following reactions:

The correct answer is:

Which of the following are ambident nucleophiles?
[A.] CN$^{\,-}$
[B.] CH$_{3}$COO$^{\,-}$
[C.] NO$_{2}^{\,-}$
[D.] CH$_{3}$O$^{\,-}$
[E.] NH$_{3}$

Two statements are given below:
I. Shaving soaps contain sodium carbonate
II. Laundry soaps contain sodium rosinates
The correct answer is:

Which of the following are present in DNA?

Identify the anomers from the following.

Which of the following is vulcanised rubber?

The sum of coordination number and oxidation number of the metal M in the complex \[ [M({en})_2(C_2O_4)] \quad {(en = ethylenediamine)} \]

Which of the following reducing agents liberates hydrogen from dilute acid?

What are X and Y respectively in the following reactions? \[ {Cu} + {HNO}_3 \, ({dilute}) \rightarrow {Cu(NO}_3)_2 + {H}_2{O} + X \] \[ {Zn} + {HNO}_3 \, ({dilute}) \rightarrow {Zn(NO}_3)_2 + {H}_2{O} + Y \]

From the following identify pairs in which metal is correctly matched with its refining process:

Which of the following is useful to verify the charge on colloidal particles?

Identify the correct statements from the following:
[I.] At constant pressure, physical adsorption decreases with increase in temperature.
[II.] Enthalpy of physisorption is higher than enthalpy of chemisorption.
[III.] Gas mask used in coal mines consists of activated charcoal.

The rate constant of a first order reaction at 400 K and 500 K is respectively $ 2 \times 10^{-5} \, {s}^{-1} $ and $ 4 \times 10^{-3} \, {s}^{-1} $. What is the approximate activation energy (in kJ/mol$^{-1}$)? (R = 8.3 J mol$^{-1}$ K$^{-1}$, log 2 = 0.3)

The standard Gibbs free energy change $ \Delta G^\circ $ of a cell reaction is $-301 { kJ/mol}$. What is $ E^\circ $ in volts?
(Given: $ F = 96500 { C/mol}$, $ n = 2 $)

Let $ x $ grams of benzoic acid (molar mass = 122 g/mol$^{-1}$) be dissolved in 50 g of benzene. Its freezing point was found to be 277.82 K. What is the value of $ x $? (Given: $ K_f $ of benzene = 5.1 K kg mol$^{-1}$, freezing point of benzene = 278.45 K, and van't Hoff's factor of benzoic acid = 0.5)

At 298 K, the density of an aqueous solution containing 82 g of acetic acid per dm$^3$ is 1.01 kg dm$^{-3}$. If the molarity of the solution is $x$ M, the molality $m$ of the same solution is (molar mass of acetic acid = 60 g mol$^{-1}$):

X-ray diffraction studies show that a metal 'M' crystallises in an fcc unit cell with edge length of 400 pm. If the density of the metal is $7.5 \times 10^3 { kg/m}^{-3}$, the number of unit cells present in 0.015 kg of it is:

What is the percentage of carbon in the compound X, formed in the given sequence of reactions?

In Kjeldahl's method of estimation of nitrogen, the ammonia evolved from 0.2 g of an organic compound was absorbed in 60 mL of 0.1 M $H_2SO_4$. If 40 mL of 0.1 M NaOH is required for complete neutralisation of the unused acid, the percentage of nitrogen in the compound is:

Which one of the following pairs of gases does not represent the greenhouse gases?

Given are two statements regarding the properties of carbon in Group 14 of the periodic table:
Statement-I: Carbon has the highest catenation power in group 14 elements.
Statement-II: Carbon has small size and high electronegativity compared to other elements of group 14.