Quiz about Chemistry in Class 11

Question 1

The temperature of heavy water is increased from 4^@C to 14^@C . Then the correct statement is

Accepted Answer

NA

Question 2

What is the equilibrium concentration of each of the substances in the equilibrium when the initial concentration of ICl was 0.78 M ?  2ICl_((g)) hArr I_(2(g)) + Cl_(2(g)) K_c=0.14

Accepted Answer

NA

Question 3

What is the reaction given below called ?  H_(2)O_((l)) + H_(2)O_((l)) hArr H_(3)O_((aq))^(+) + OH_((aq))^(-)

Accepted Answer

NA

Question 4

The unsaturated element among the following is

Accepted Answer

NA

Question 5

What are the oxidation number of the underlined elements in each of the following and how do you rationalise your results?  ul(C)H_(3)ul(C)OOH

Accepted Answer

NA

Question 6

There are certain properties of the elements which vary (increase or decrease) gradually in the same period or group with increase in atomic number. These properties of elements which show a regular gradation on moving from left to right in a period or from top to bottom in a group are called periodic properties. The recurrence of similar properties of elements after certain regular intervals when they are arranged in the increasing order of their atomic numbers is called periodicity valency atomic Some of the properties such as ionic size ionization enthalpies electro-negativity electron gain enthalpy oxidizingeducing power acidbase character etc. are directly related to the electronic configuration of the elements. On the other hand there are some properties such as etc. which are indirectly related to the electronic configuration of the elements. The cause of repetition of similar electronic configuration of their atoms in valence shells after regular intervals melting points density Down the group the atomicionic radii metallic character and valencing character increase whereas ionisation enthalpy and electronegativity decrease. Across a right period from left to atomicionic radii and metallic character decrease whereas ionization enthalpy electronegativity non-metallic character and oxidizing power increase. In general electron gain enthalpy decreases i.e. becomes less negative bottom in a group. Across a period from left to right there is an over all increase in the electron gain enthalpies (i.e. it becomes more negative). However most gases have positive electron gain enthalpies which do not show any regular trend.  Which of the following does not reflect the periodicity of elements ?

Accepted Answer

NA

Question 7

There are certain properties of the elements which vary (increase or decrease) gradually in the same period or group with increase in atomic number. These properties of elements which show a regular gradation on moving from left to right in a period or from top to bottom in a group are called periodic properties. The recurrence of similar properties of elements after certain regular intervals when they are arranged in the increasing order of their atomic numbers is called periodicity valency atomic Some of the properties such as ionic size ionization enthalpies electro-negativity electron gain enthalpy oxidizingeducing power acidbase character etc. are directly related to the electronic configuration of the elements. On the other hand there are some properties such as etc. which are indirectly related to the electronic configuration of the elements. The cause of repetition of similar electronic configuration of their atoms in valence shells after regular intervals melting points density Down the group the atomicionic radii metallic character and valencing character increase whereas ionisation enthalpy and electronegativity decrease. Across a right period from left to atomicionic radii and metallic character decrease whereas ionization enthalpy electronegativity non-metallic character and oxidizing power increase. In general electron gain enthalpy decreases i.e. becomes less negative bottom in a group. Across a period from left to right there is an over all increase in the electron gain enthalpies (i.e. it becomes more negative). However most gases have positive electron gain enthalpies which do not show any regular trend.  Which of the following has least ionization potential ?

Accepted Answer

NA

Question 8

What is the actual order of acidicity of following compounds ?  CO_(2) CuO CaO H_(2) O

Accepted Answer

NA

Question 9

There are certain properties of the elements which vary (increase or decrease) gradually in the same period or group with increase in atomic number. These properties of elements which show a regular gradation on moving from left to right in a period or from top to bottom in a group are called periodic properties. The recurrence of similar properties of elements after certain regular intervals when they are arranged in the increasing order of their atomic numbers is called periodicity valency atomic Some of the properties such as ionic size ionization enthalpies electro-negativity electron gain enthalpy oxidizingeducing power acidbase character etc. are directly related to the electronic configuration of the elements. On the other hand there are some properties such as etc. which are indirectly related to the electronic configuration of the elements. The cause of repetition of similar electronic configuration of their atoms in valence shells after regular intervals melting points density Down the group the atomicionic radii metallic character and valencing character increase whereas ionisation enthalpy and electronegativity decrease. Across a right period from left to atomicionic radii and metallic character decrease whereas ionization enthalpy electronegativity non-metallic character and oxidizing power increase. In general electron gain enthalpy decreases i.e. becomes less negative bottom in a group. Across a period from left to right there is an over all increase in the electron gain enthalpies (i.e. it becomes more negative). However most gases have positive electron gain enthalpies which do not show any regular trend.  The most electronegative element in the periodic table is

Accepted Answer

NA

Question 10

There are certain properties of the elements which vary (increase or decrease) gradually in the same period or group with increase in atomic number. These properties of elements which show a regular gradation on moving from left to right in a period or from top to bottom in a group are called periodic properties. The recurrence of similar properties of elements after certain regular intervals when they are arranged in the increasing order of their atomic numbers is called periodicity valency atomic Some of the properties such as ionic size ionization enthalpies electro-negativity electron gain enthalpy oxidizingeducing power acidbase character etc. are directly related to the electronic configuration of the elements. On the other hand there are some properties such as etc. which are indirectly related to the electronic configuration of the elements. The cause of repetition of similar electronic configuration of their atoms in valence shells after regular intervals melting points density Down the group the atomicionic radii metallic character and valencing character increase whereas ionisation enthalpy and electronegativity decrease. Across a right period from left to atomicionic radii and metallic character decrease whereas ionization enthalpy electronegativity non-metallic character and oxidizing power increase. In general electron gain enthalpy decreases i.e. becomes less negative bottom in a group. Across a period from left to right there is an over all increase in the electron gain enthalpies (i.e. it becomes more negative). However most gases have positive electron gain enthalpies which do not show any regular trend.  Which of the following ions has the smallest radius?

Accepted Answer

NA

Question 11

Two gases X and Y one being the dimer of other are at equilibrium. Increase of volume at constant temperature or increase of temperature at constant pressure favours the formation of more Y. The reaction could not be represented by

Accepted Answer

NA

Question 12

There are certain properties of the elements which vary (increase or decrease) gradually in the same period or group with increase in atomic number. These properties of elements which show a regular gradation on moving from left to right in a period or from top to bottom in a group are called periodic properties. The recurrence of similar properties of elements after certain regular intervals when they are arranged in the increasing order of their atomic numbers is called periodicity valency atomic Some of the properties such as ionic size ionization enthalpies electro-negativity electron gain enthalpy oxidizingeducing power acidbase character etc. are directly related to the electronic configuration of the elements. On the other hand there are some properties such as etc. which are indirectly related to the electronic configuration of the elements. The cause of repetition of similar electronic configuration of their atoms in valence shells after regular intervals melting points density Down the group the atomicionic radii metallic character and valencing character increase whereas ionisation enthalpy and electronegativity decrease. Across a right period from left to atomicionic radii and metallic character decrease whereas ionization enthalpy electronegativity non-metallic character and oxidizing power increase. In general electron gain enthalpy decreases i.e. becomes less negative bottom in a group. Across a period from left to right there is an over all increase in the electron gain enthalpies (i.e. it becomes more negative). However most gases have positive electron gain enthalpies which do not show any regular trend.  Which of the following is isoelectronic with carbon atom?

Accepted Answer

NA

Question 13

What is redox reaction ? Explain its uses.

Accepted Answer

NA

Question 14

There are certain properties of the elements which vary (increase or decrease) gradually in the same period or group with increase in atomic number. These properties of elements which show a regular gradation on moving from left to right in a period or from top to bottom in a group are called periodic properties. The recurrence of similar properties of elements after certain regular intervals when they are arranged in the increasing order of their atomic numbers is called periodicity valency atomic Some of the properties such as ionic size ionization enthalpies electro-negativity electron gain enthalpy oxidizingeducing power acidbase character etc. are directly related to the electronic configuration of the elements. On the other hand there are some properties such as etc. which are indirectly related to the electronic configuration of the elements. The cause of repetition of similar electronic configuration of their atoms in valence shells after regular intervals melting points density Down the group the atomicionic radii metallic character and valencing character increase whereas ionisation enthalpy and electronegativity decrease. Across a right period from left to atomicionic radii and metallic character decrease whereas ionization enthalpy electronegativity non-metallic character and oxidizing power increase. In general electron gain enthalpy decreases i.e. becomes less negative bottom in a group. Across a period from left to right there is an over all increase in the electron gain enthalpies (i.e. it becomes more negative). However most gases have positive electron gain enthalpies which do not show any regular trend.  Which of the following electronic configuration would exhibit the lowest first ionization energy?

Accepted Answer

NA

Question 15

What type of substances would make better permanent magnets ferromagnetic or ferrimagnetic Justify your answer.

Accepted Answer

NA

Question 16

There are certain properties of the elements which vary (increase or decrease) gradually in the same period or group with increase in atomic number. These properties of elements which show a regular gradation on moving from left to right in a period or from top to bottom in a group are called periodic properties. The recurrence of similar properties of elements after certain regular intervals when they are arranged in the increasing order of their atomic numbers is called periodicity valency atomic Some of the properties such as ionic size ionization enthalpies electro-negativity electron gain enthalpy oxidizingeducing power acidbase character etc. are directly related to the electronic configuration of the elements. On the other hand there are some properties such as etc. which are indirectly related to the electronic configuration of the elements. The cause of repetition of similar electronic configuration of their atoms in valence shells after regular intervals melting points density Down the group the atomicionic radii metallic character and valencing character increase whereas ionisation enthalpy and electronegativity decrease. Across a right period from left to atomicionic radii and metallic character decrease whereas ionization enthalpy electronegativity non-metallic character and oxidizing power increase. In general electron gain enthalpy decreases i.e. becomes less negative bottom in a group. Across a period from left to right there is an over all increase in the electron gain enthalpies (i.e. it becomes more negative). However most gases have positive electron gain enthalpies which do not show any regular trend.  Which of the following has the highest electron gain enthalpy?

Accepted Answer

NA

Question 17

There are certain properties of the elements which vary (increase or decrease) gradually in the same period or group with increase in atomic number. These properties of elements which show a regular gradation on moving from left to right in a period or from top to bottom in a group are called periodic properties. The recurrence of similar properties of elements after certain regular intervals when they are arranged in the increasing order of their atomic numbers is called periodicity valency atomic Some of the properties such as ionic size ionization enthalpies electro-negativity electron gain enthalpy oxidizingeducing power acidbase character etc. are directly related to the electronic configuration of the elements. On the other hand there are some properties such as etc. which are indirectly related to the electronic configuration of the elements. The cause of repetition of similar electronic configuration of their atoms in valence shells after regular intervals melting points density Down the group the atomicionic radii metallic character and valencing character increase whereas ionisation enthalpy and electronegativity decrease. Across a right period from left to atomicionic radii and metallic character decrease whereas ionization enthalpy electronegativity non-metallic character and oxidizing power increase. In general electron gain enthalpy decreases i.e. becomes less negative bottom in a group. Across a period from left to right there is an over all increase in the electron gain enthalpies (i.e. it becomes more negative). However most gases have positive electron gain enthalpies which do not show any regular trend.  Consider the isoelectronic series K^+ S^(2-) CI^- and Ca^(2+) the radius of the ions decreases as

Accepted Answer

NA

Question 18

What is the formula name and molecular mass of compound. Which obtain by estimation of phosphorus?

Accepted Answer

NA

Question 19

There are certain properties of the elements which vary (increase or decrease) gradually in the same period or group with increase in atomic number. These properties of elements which show a regular gradation on moving from left to right in a period or from top to bottom in a group are called periodic properties. The recurrence of similar properties of elements after certain regular intervals when they are arranged in the increasing order of their atomic numbers is called periodicity valency atomic Some of the properties such as ionic size ionization enthalpies electro-negativity electron gain enthalpy oxidizingeducing power acidbase character etc. are directly related to the electronic configuration of the elements. On the other hand there are some properties such as etc. which are indirectly related to the electronic configuration of the elements. The cause of repetition of similar electronic configuration of their atoms in valence shells after regular intervals melting points density Down the group the atomicionic radii metallic character and valencing character increase whereas ionisation enthalpy and electronegativity decrease. Across a right period from left to atomicionic radii and metallic character decrease whereas ionization enthalpy electronegativity non-metallic character and oxidizing power increase. In general electron gain enthalpy decreases i.e. becomes less negative bottom in a group. Across a period from left to right there is an over all increase in the electron gain enthalpies (i.e. it becomes more negative). However most gases have positive electron gain enthalpies which do not show any regular trend.  Tick the correct order of second ionization enthalpy in the following

Accepted Answer

NA

Question 20

Which one is carcinogens ?

Accepted Answer

NA

Question 21

There are certain properties of the elements which vary (increase or decrease) gradually in the same period or group with increase in atomic number. These properties of elements which show a regular gradation on moving from left to right in a period or from top to bottom in a group are called periodic properties. The recurrence of similar properties of elements after certain regular intervals when they are arranged in the increasing order of their atomic numbers is called periodicity valency atomic Some of the properties such as ionic size ionization enthalpies electro-negativity electron gain enthalpy oxidizingeducing power acidbase character etc. are directly related to the electronic configuration of the elements. On the other hand there are some properties such as etc. which are indirectly related to the electronic configuration of the elements. The cause of repetition of similar electronic configuration of their atoms in valence shells after regular intervals melting points density Down the group the atomicionic radii metallic character and valencing character increase whereas ionisation enthalpy and electronegativity decrease. Across a right period from left to atomicionic radii and metallic character decrease whereas ionization enthalpy electronegativity non-metallic character and oxidizing power increase. In general electron gain enthalpy decreases i.e. becomes less negative bottom in a group. Across a period from left to right there is an over all increase in the electron gain enthalpies (i.e. it becomes more negative). However most gases have positive electron gain enthalpies which do not show any regular trend.  The incorrect statement among the following is

Accepted Answer

NA

Question 22

What are the common physical and chemical features of alkali metals?

Accepted Answer

NA

Question 23

There are certain properties of the elements which vary (increase or decrease) gradually in the same period or group with increase in atomic number. These properties of elements which show a regular gradation on moving from left to right in a period or from top to bottom in a group are called periodic properties. The recurrence of similar properties of elements after certain regular intervals when they are arranged in the increasing order of their atomic numbers is called periodicity valency atomic Some of the properties such as ionic size ionization enthalpies electro-negativity electron gain enthalpy oxidizingeducing power acidbase character etc. are directly related to the electronic configuration of the elements. On the other hand there are some properties such as etc. which are indirectly related to the electronic configuration of the elements. The cause of repetition of similar electronic configuration of their atoms in valence shells after regular intervals melting points density Down the group the atomicionic radii metallic character and valencing character increase whereas ionisation enthalpy and electronegativity decrease. Across a right period from left to atomicionic radii and metallic character decrease whereas ionization enthalpy electronegativity non-metallic character and oxidizing power increase. In general electron gain enthalpy decreases i.e. becomes less negative bottom in a group. Across a period from left to right there is an over all increase in the electron gain enthalpies (i.e. it becomes more negative). However most gases have positive electron gain enthalpies which do not show any regular trend.  The outermost electronic configuration of the most electronegative element is

Accepted Answer

NA

Question 24

What is point dipole?

Accepted Answer

NA

Question 25

There are certain properties of the elements which vary (increase or decrease) gradually in the same period or group with increase in atomic number. These properties of elements which show a regular gradation on moving from left to right in a period or from top to bottom in a group are called periodic properties. The recurrence of similar properties of elements after certain regular intervals when they are arranged in the increasing order of their atomic numbers is called periodicity valency atomic Some of the properties such as ionic size ionization enthalpies electro-negativity electron gain enthalpy oxidizingeducing power acidbase character etc. are directly related to the electronic configuration of the elements. On the other hand there are some properties such as etc. which are indirectly related to the electronic configuration of the elements. The cause of repetition of similar electronic configuration of their atoms in valence shells after regular intervals melting points density Down the group the atomicionic radii metallic character and valencing character increase whereas ionisation enthalpy and electronegativity decrease. Across a right period from left to atomicionic radii and metallic character decrease whereas ionization enthalpy electronegativity non-metallic character and oxidizing power increase. In general electron gain enthalpy decreases i.e. becomes less negative bottom in a group. Across a period from left to right there is an over all increase in the electron gain enthalpies (i.e. it becomes more negative). However most gases have positive electron gain enthalpies which do not show any regular trend.  The increasing order of the atomic radius for the elements Na Rb K and Mg is

Accepted Answer

NA

Question 26

Water is a

Accepted Answer

NA

Question 27

The value of Plancks constant is 6.63 xx 10^(-34)Js. The speed of light is 3xx 10^(17) nm s^(-1). Which value is closest to the wavelength in nanometer of a quantum of light with frequency of 6 xx 10^(15) s^(-1) ?

Accepted Answer

NA

Question 28

What is hydrogenation? Give one example.

Accepted Answer

NA

Question 29

The standard enthalpies of formation of H_(2)O_(2(l)) and H_(2)O_((l)) are -187.8kJ mole^(-1) and -285.8 kJ mole^(-1) respectively. The DeltaH^(0) for the decomposition of one mole of H_(2)O_(2(l)) to H_(2)O_((l)) and O_(2(g)) is

Accepted Answer

NA

Question 30

Which of the following metal is softer than Pb but harder than Na ?

Accepted Answer

NA

Question 31

What is the effect on the pressure of a gas if its temperature is increased at constant volume ?

Accepted Answer

NA

Question 32

When heated in air the alkali metals form various oxides. Mention the oxides formed by Li Na and K.

Accepted Answer

NA

Question 33

The Wurtz-Fitting reaction may be employed to unite aryl and redicals although it is impreactical for the union of unlike aliphatic radicals. Explain.

Accepted Answer

NA

Question 34

Why alkali metals have high chemical reactivity? How this changes along the group?

Accepted Answer

NA

Question 35

Which one of the following is the correct statement ?

Accepted Answer

NA

Question 36

The reagent used in the conversion C_6H_6 to C_6H_5 - OH is

Accepted Answer

NA

Question 37

The relative reactivity of 1^(@) 2^(@) and 3^(@) hydrogens in chlorination reaction has been found to be 13.85 in the reaction    The ratio of the amount of the product (A) (B) (C) and (D) is expected to be

Accepted Answer

NA

Question 38

Which metal is protected by layer of its own

Accepted Answer

NA

Question 39

Which of the following does not form M^(+3)?

Accepted Answer

NA

Question 40

The solubility productof magnesium hydroxide (Mg(OH)_2) is 1.2xx10^(-11) .Calculate its solubility in pure water and 0.05 M NaOH.

Accepted Answer

NA

Question 41

Which of the following are wrong statements ?

Accepted Answer

NA

Question 42

What is Soda ash ?

Accepted Answer

NA

Question 43

Which one of the following is an example for disproportionation reaction?

Accepted Answer

NA

Question 44

Which of the following compounds have plane of symmetry?

Accepted Answer

NA

Question 45

Water extinguishes most fires but it does not extinguish petrol fire. Explain.

Accepted Answer

NA

Question 46

The total number of fundamental particles in tritium atom is

Accepted Answer

NA

Question 47

Which one of the following is incorrect ?

Accepted Answer

NA

Question 48

Which is the strongest reducing agent ?

Accepted Answer

NA

Question 49

Which of the following statement is not correct from the view point of molecular orbital theory ?

Accepted Answer

NA

Question 50

Which of the following solution will have pH = 13 on assuming complete dissociation

Accepted Answer

NA

Explore topic-wise InterviewSolutions in Current Affairs.

The temperature of heavy water is increased from 4^@C to 14^@C . Then the correct statement is

What is the equilibrium concentration of each of the substances in the equilibrium when the initial concentration of ICl was 0.78 M ? 2ICl_((g)) hArr I_(2(g)) + Cl_(2(g)) , K_c=0.14

What is the reaction given below, called ? H_(2)O_((l)) + H_(2)O_((l)) hArr H_(3)O_((aq))^(+) + OH_((aq))^(-)

The unsaturated element among the following is

What are the oxidation number of the underlined elements in each of the following and how do you rationalise your results? ul(C)H_(3)ul(C)OOH

What is the actual order of acidicity of following compounds ? CO_(2) , CuO, CaO, H_(2) O

Two gases X and Y, one being the dimer of other are at equilibrium. Increase of volume at constant temperature or increase of temperature at constant pressure favours the formation of more Y. The reaction could not be represented by: