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CBSE Class XI
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Chemistry
List of top Chemistry Questions asked in CBSE Class XI
Predict the products of electrolysis in each of the following:
An aqueous solution of
\(AgNO_3\)
with silver electrodes
An aqueous solution
\(AgNO_3\)
with platinum electrodes
A dilute solution of
\(H_2SO_4\)
with platinum electrodes
An aqueous solution of
\(CuCl_2\)
with platinum electrodes.
CBSE Class XI
Chemistry
Redox Reactions And Electrode Processes
Calculate the wavelength, frequency and wave number of a light wave whose period is
\(2.0×10^{–10}\ s\)
.
CBSE Class XI
Chemistry
Developments Leading to the Bohr’s Model of Atom
What is the number of photons of light with a wavelength of 4000 pm that provide 1J of energy?
CBSE Class XI
Chemistry
Developments Leading to the Bohr’s Model of Atom
Arrange the following metals in the order in which they displace each other from the solution of their salts.
Al, Cu, Fe, Mg and Zn.
CBSE Class XI
Chemistry
Redox Reactions In Terms Of Electron Transfer Reactions
Calculate the pH of the resultant mixtures:
a) 10 mL of 0.2M Ca(OH)
2
+ 25 mL of 0.1M HCl
b) 10 mL of 0.01M H
2
SO
4
+ 10 mL of 0.01M Ca(OH)
2
c) 10 mL of 0.1M H
2
SO
4
+ 10 mL of 0.1M KOH
CBSE Class XI
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
The ionic product of water at 310 K is 2.7 × 10
–14
. What is the pH of neutral water at this temperature?
CBSE Class XI
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
Given the standard electrode potentials,
K
+
/K = -2.93V,
Ag
+
/Ag = 0.80V,
Hg
2+
/Hg = 0.79V
Mg
2+
/Mg = -2.37V.
Cr
3+
/Cr = -0.74V
Arrange these metals in their increasing order of reducing power.
CBSE Class XI
Chemistry
Redox Reactions And Electrode Processes
Depict the galvanic cell in which the reaction Zn(s) + 2Ag
+
(aq)
\(\rightarrow\)
Zn
2+
(aq) + 2Ag(s) takes place, further show:
which of the electrode is negatively charged,
the carriers of the current in the cell, and
individual reaction at each electrode.
CBSE Class XI
Chemistry
Redox Reactions And Electrode Processes
Write IUPAC names of the following compounds:
CBSE Class XI
Chemistry
Classification of Hydrocarbons
Fluorine reacts with ice and results in the change:
\(H_2O(s) + F_2{(g)} \rightarrow HF{(g)} + HOF{(g)}\)
Justify that this reaction is a redox reaction.
CBSE Class XI
Chemistry
Classical Idea Of Redox Reactions – Oxidation And Reduction Reactions
While sulphur dioxide and hydrogen peroxide can act as oxidising as well as reducing agents in their reactions, ozone and nitric acid act only as oxidants. Why?
CBSE Class XI
Chemistry
Classical Idea Of Redox Reactions – Oxidation And Reduction Reactions
Suggest a list of the substances where carbon can exhibit oxidation states from -4 to +4 and nitrogen from -3 to +5.
CBSE Class XI
Chemistry
Redox Reactions In Terms Of Electron Transfer Reactions
Write the formulae for the following compounds:
(a) Mercury (II) chloride (b) Nickel (II) sulphate
(c) Tin (IV) oxide (d) Thallium (I) sulphate
(e) Iron (III) sulphate (f) Chromium (III) oxide
CBSE Class XI
Chemistry
Classical Idea Of Redox Reactions – Oxidation And Reduction Reactions
The ionization constant of chloroacetic acid is 1.35 × 10
–3
. What will be the pH of 0.1M acid and its 0.1M sodium salt solution?
CBSE Class XI
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
Predict if the solutions of the following salts are neutral, acidic or basic: NaCl, KBr, NaCN, NH
4
NO
3
, NaNO
2
and KF
CBSE Class XI
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
A 0.02M solution of pyridinium hydrochloride has pH = 3.44. Calculate the ionization constant of pyridine.
CBSE Class XI
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
The ionization constant of nitrous acid is 4.5 × 10
–4
. Calculate the pH of 0.04 M sodium nitrite solution and also its degree of hydrolysis.
CBSE Class XI
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
The pH of 0.1M solution of cyanic acid (HCNO) is 2.34. Calculate the ionization constant of the acid and its degree of ionization in the solution.
CBSE Class XI
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
The solubility of Sr(OH)
2
at 298 K is 19.23 g/L of solution. Calculate the concentrations of strontium and hydroxyl ions and the pH of the solution.
CBSE Class XI
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
If 0.561 g of KOH is dissolved in water to give 200 mL of solution at 298 K. Calculate the concentrations of potassium, hydrogen and hydroxyl ions. What is its pH?
CBSE Class XI
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
The pH of milk, black coffee, tomato juice, lemon juice and egg white are 6.8, 5.0, 4.2, 2.2 and 7.8 respectively. Calculate corresponding hydrogen ion concentration in each.
CBSE Class XI
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
The ionization constant of propanoic acid is 1.32 × 10
–5
. Calculate the degree of ionization of the acid in its 0.05M solution and also its pH. What will be its degree of ionization if the solution is 0.01M in HCl also?
CBSE Class XI
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
Why is benzene extra ordinarily stable though it contains three double bonds?
CBSE Class XI
Chemistry
Aromatic Hydrocarbon
Calculate the hydrogen ion concentration in the following biological fluids whose pH are given below:
(a) Human muscle-fluid,6.83
(b) Human stomach fluid,1.2
(c) Human blood,7.38
(d) Human saliva,6.4
CBSE Class XI
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
Write chemical equations for combustion reaction of the following hydrocarbons:
Butane
Pentene
Hexyne
Toluene
CBSE Class XI
Chemistry
Classification of Hydrocarbons
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