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Test: Periodic Trends in Properties of Elements - Chemistry MCQ


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10 Questions MCQ Test Inorganic Chemistry - Test: Periodic Trends in Properties of Elements

Test: Periodic Trends in Properties of Elements for Chemistry 2024 is part of Inorganic Chemistry preparation. The Test: Periodic Trends in Properties of Elements questions and answers have been prepared according to the Chemistry exam syllabus.The Test: Periodic Trends in Properties of Elements MCQs are made for Chemistry 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Periodic Trends in Properties of Elements below.
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Test: Periodic Trends in Properties of Elements - Question 1

Atomic radii ______ along the periods.

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 1

Atomic radii decreases along the periods because as the number of electrons increases in the same shell of the atom, the effective nuclear attraction increases, thereby reducing the distance between the outer shell and the nucleus i.e. decreasing atomic radii.

Test: Periodic Trends in Properties of Elements - Question 2

X(g) → X+(g) + e. What does this chemical reaction need to occur?

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 2

The minimum amount of energy that is required to remove an electron from an atom is called Ionization enthalpy. It is expressed in the units KJ/mol. Electron affinity is the change in the energy when we add an electron to a neutral atom. Electropositivity is a metallic characteristic. A catalyst speeds up the reaction.

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Test: Periodic Trends in Properties of Elements - Question 3

Ionization energies are always positive.

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 3

As the ionization energy is the minimum amount of energy that is required to remove an electron from an atom. As the energy is always needed for the removal of an electron from an atom, the values of ionization energies are always positive.

Test: Periodic Trends in Properties of Elements - Question 4

The relationship between Li, Mg and Be, Al is called the __________ relationship.

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 4

The Elements Li and Mg, Be and Al are similar to each other in the case of formation of different compounds in a similar composition. They have a sort of similar behaviour with each other, so they are said to be in a diagonal relationship as per their place in the periodic table.

Test: Periodic Trends in Properties of Elements - Question 5

Which of the following is superoxide?

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 5

In the superoxide of the element, the oxygen’s oxidation state is given by -1/2. In peroxides, the oxidation state of oxygen is -1 as in case of hydrogen peroxide. The oxygen’s oxidation state in KO2 is -1/2.

Test: Periodic Trends in Properties of Elements - Question 6

O2-, F, Na+ and Mg2+ are called as _______

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 6

O2-, F, Na+ and Mg2+ are known as isoelectronic species as they all have the same no. of electrons(10). Isotopes contain the same no. of protons but a different number of neutrons. Isobars have the same mass number but a different atomic number.

Test: Periodic Trends in Properties of Elements - Question 7

What is the correct order of electronegativity among the following options?

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 7

Electronegativity is the measure of the ability to attract shared electrons to itself of an atom in a chemical compound. The values of electronegativities of Li, Na, K, Rb and Cs are 1, 0.9, 0.8, 0.8 and 0.7 respectively.

Test: Periodic Trends in Properties of Elements - Question 8

What is the oxidation state of Mn in KMnO4?

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 8

The total charge of the compound KMnO4 is zero as it is a neutral and stable compound. As we know the oxidation states of K and O are +1 and -2 respectively. So +1 + Mn charge + 4(-2) = 0; Mn charge = 7.

Test: Periodic Trends in Properties of Elements - Question 9

N2O is a ______

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 9

N2O is called laughing gas as it has euphoric effects after being inhaled. It is one of the World Health Organization’s Essential Medicines. it is used for recreational and anaesthetic purposes mostly.

Test: Periodic Trends in Properties of Elements - Question 10

What can be tested using a litmus paper?

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 10

A litmus paper is a dye that is extracted from lichens. It used to test acidic nature and basic nature of a substance. Red colour indicates acidic nature and blue colour indicated basic nature. Neutral litmus paper is purple in colour.

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