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Chemistry 11 Past Paper 2022 | Notely

HomePast papersChemistry 112022

All Chemistry 11 papers

Class 11 · Past paper

Chemistry 11 past paper 2022

58 published questions in this index. The full practice view lets you work through them and track your own attempts.

33 MCQs25 written questionsPractise this paper

Question index

1
Number of atoms of oxygen present in $500\text{ g}$ of $KClO_3$ is (M.Wt: $K=39, Cl=35.5, O=16$):
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1
The number of hydrogen molecules required to form 36 g of water (H₂O): 2H₂ + O₂ → 2H₂O
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1
The liquid $CHBr_3$ has a density of $2.89\text{ g/cm}^3$. What volume of this liquid should be measured to contain a total of $4.8 \times 10^{24}$ molecules of $CHBr_3$? (M.Wt: $C…
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1
Consider the reaction $CH_4 + H_2O \rightarrow CO + 3H_2$. (i) What is the amount of $CO$ produced if $30\text{ g}$ of $CH_4$ and $50\text{ g}$ of $H_2O$ is used? (ii) In an experi…

This is a skimmable index, not a replacement for the study surface. Open the practice view to answer questions and use the linked study material.

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2

Magnesium reacts with Sulphur to produce $MgS$. How many grams of $MgS$ can be made from $24\text{ g}$ of $Mg$ with excess of Sulphur by the reaction $Mg + S \rightarrow MgS$? (M.W…

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2

The values of Balmer series wave number lines lie in:

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2

Point out the three defects of Bohr's model.

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2

Describe the construction of a lead storage battery and the reactions taking place during charging and discharging.

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3

Which of the following is **NOT** a state function?

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3

Which of the following sets of quantum numbers is incorrect for an electron?

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3

How does **dipole moment** help to determine the polarity of molecules? Apply this concept to determine the nature of $CO_2$ and *cis*-1,2-dichloroethene.

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3

What is **orbital hybridization**? Explain the structure of $HC \equiv CH$, $BF_3$, and $CH_4$ on the basis of hybridization.

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4

If frequency of Photon is $4 \times 10^{15}\text{ Hz}$, then its energy will be: ($h = 6.626 \times 10^{-34}\text{ Js}$)

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4

Hybridization of beryllium in $BeCl_2$ will be:

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4

Predict and draw the shape and bond angles of the following molecules on the basis of **VSEPR theory**: (i) $H_2S$ (ii) $SnCl_2$ (iii) $PCl_3$

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4

State **Le-Chatelier's principle**. Briefly discuss the effect of increase in pressure, increase in concentration of $SO_2$, increase in temperature, and increase in $NO_2$ catalys…

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5

According to Moseley's law, when metals having large atomic number are used as an anode, they will produce X-rays of:

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5

Which one of the following gas molecules will only show translational motion?

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5

Briefly explain **azimuthal quantum number**. How does it help to determine the number of electrons in a subshell?

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5

Draw the complete **Born-Haber cycle** for the formation of $MgO$ from the following data: $\Delta H_f^0$ of $MgO = -602\text{ kJ/mol}$, $\Delta H_s^0$ of $Mg = 150\text{ kJ/mol}$,…

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6

Total number of **Sigma** and **Pi** bonds in Ethyne ($CH \equiv CH$) are:

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6

According to **Graham's Law of Diffusion**, the rate of diffusion ($v$) is related to mass ($m$) as:

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6

Why does the addition of solute increase the boiling point of a solution? Explain the quantitative aspects of elevation of boiling point and prove that $\Delta T_b$ is inversely pr…

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7

Identify the species with **maximum** bond angle:

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7

**Osmotic pressure** ($\pi$) does NOT depend on:

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7

How can the **molar mass** and **density** of a gas be determined with the help of the general gas equation?

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8

In lead storage battery, the electrolyte is:

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8

Equilibrium constants $K_c = K_p$, when $\Delta n$ is:

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8

Why is **butane** a gas at room temperature while **hexane** is a liquid?

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9

According to **Le Chatelier's Principle**, in an exothermic reaction, what should be done to the temperature of the system to obtain maximum product at equilibrium?

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9

$K_a$ is acid association constant; a large $pK_a$ value for an acid indicates that the acid is:

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9

Differentiate between **Isomorphism** and **Polymorphism** with suitable examples.

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10

According to **Graham's law**, which one has the highest rate of diffusion? (M.Wt: $S=32, O=16, H=1$)

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10

Which of the following is an **acidic salt**?

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10

Describe **electron sea theory**. How does it explain the properties of metals?

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11

Rate of reaction is independent of the concentration of reactants in:

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11

For the reaction $N_2 + 3H_2 \rightleftharpoons 2NH_3$ with $K_c = 6 \times 10^{-1}$ at $500^{\circ}C$, predict the direction in which the system will shift to attain equilibrium w…

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12

Which one is a conductor but not malleable?

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12

Which of the following gases will be most **non-ideal** at $-10^{\circ}C$?

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12

Calculate the **pH** of a buffer when molar concentrations of $NH_4OH$ and $NH_4Cl$ are $1.0\text{ M}$ and $0.1\text{ M}$ respectively. $pK_b$ of $NH_4OH$ is $4.75$.

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13

Which of the following concentration units does **NOT** depend on temperature?

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13

$\Delta H = \Delta E + P\Delta V$ is the formula for:

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13

Explain with chemical equations why aqueous solutions of: (i) $NH_4Cl$ is acidic (ii) $K_2CO_3$ is basic (iii) $Na_2SO_4$ is neutral.

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14

Which of the following will contain the **lowest** vapor pressure at $50^{\circ}C$?

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14

Which of the following relationships is **incorrect**?

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14

Consider the reaction $2H_2 + 2NO \rightarrow N_2 + 2H_2O$ with rate law $R = K[H_2][NO]^2$. If this reaction occurs in two steps, write its mechanism and predict the reaction inte…

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15

A solution of $HCl$ having $pH = 4$ will be:

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15

Oxidation state of O in KO₂ is:

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15

What is **diffusion**? Also state **Graham's law** of effusion and diffusion with its mathematical expression.

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16

$K_c = 0.04$ at $723\text{ K}$ for the following reaction: $PCl_{5(g)} \rightleftharpoons PCl_{3(g)} + Cl_{2(g)}$. The $K_p$ of the reaction will be: (where $R = 0.082\text{ atm dm…

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16

Which of the following has the **strongest intermolecular forces** of attraction?

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16

Calculate the **molality** of a $30\% \frac{w}{w}$ solution of fructose ($C_6H_{12}O_6$).

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17

In a mixture containing 44 g each of CO₂, SO₂, SO₃ and Cl₂ gases, which of the following will have the highest partial pressure according to Dalton's Law? (Molar masses: CO₂=44, SO…

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17

Lattice energy may also be called:

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17

Define **system**, **surroundings**, and **boundary** with a suitable example.

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18

Predict the feasibility of the following reaction: $Sn + Mg^{2+} \rightarrow Sn^{2+} + Mg$ given $E^{\circ}_{Sn} = -0.14\text{ V}$ and $E^{\circ}_{Mg} = -2.38\text{ V}$.

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19

**Distillation under reduced pressure** is often used for purification of sensitive liquids. Describe the process giving reasons.

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20

Apply the **$n+l$ rule** and pick the orbital with the lower energy from each of the given pairs: (i) $3d, 4s$ (ii) $2p, 3s$ (iii) $6p, 4s$.

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