Tag: mendeleev's periodic law and its limitations

Questions Related to mendeleev's periodic law and its limitations

The eight group of Mendeleev's periodic table is divided into how many subgroups?

chemistry the periodic table mendeleef's periodic table mendeleev's periodic law and its limitations mendeleev's periodic table development of the modern periodic table into the history

  1. $2$

  2. $0$

  3. $4$

  4. $1$

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Correct Option: B
Explanation:

The eight group in Mendeleev's periodic table was not divided into any group. It contained transition series elements.

Eka-silicon was the name given by Mendeleev to the element similar to ________ in properties.

chemistry the periodic table mendeleef's periodic table mendeleev's periodic law and its limitations mendeleev's periodic table development of the modern periodic table into the history

  1. Boron

  2. Germanium

  3. Aluminium

  4. Silicon

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Correct Option: B
Explanation:

The name given to the element, by Mendeleev, similar to Germanium in properties was Eka-Silicon.

Eka-Boron was the name given by Mendeleev to the element similar to _______ in properties.

chemistry the periodic table mendeleef's periodic table mendeleev's periodic law and its limitations mendeleev's periodic table development of the modern periodic table into the history

  1. Scandium

  2. Silicon

  3. Aluminium

  4. Boron

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Correct Option: A
Explanation:

The name given to the element, by Mendeleev, similar to Scandium in properties was Eka-Boron.

The groups from $1^{st}$ to $7^{th}$ of Mendeleev's periodic table were divided into ______ subgroups.

chemistry the periodic table mendeleef's periodic table mendeleev's periodic law and its limitations mendeleev's periodic table development of the modern periodic table into the history

  1. $2$

  2. $3$

  3. $4$

  4. $1$

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Correct Option: A
Explanation:

The groups from $1$st to $7$th of Mendeleev's periodic table were divided into two subgroups A and B.

Eka-aluminium forms oxide of the type :

chemistry the periodic table mendeleef's periodic table mendeleev's periodic law and its limitations mendeleev's periodic table development of the modern periodic table into the history

  1. $E _2O$

  2. $EO$

  3. $E _2O _3$

  4. $E _3O _4$

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Correct Option: C
Explanation:

The properties of Eka-aluminium are similar to gallium so it forms oxide of the type $E _2O _3$ same as $Ga _2O _3$.

Eka-aluminium forms chloride of the type :

chemistry the periodic table mendeleef's periodic table mendeleev's periodic law and its limitations mendeleev's periodic table development of the modern periodic table into the history

  1. $E _2Cl$

  2. $ECl _3$

  3. $E _2Cl _3$

  4. $E _3Cl _4$

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Correct Option: B
Explanation:

The properties of Eka-aluminium are similar to gallium so it forms chloride of the type $ECl _3$ same as $GaCl _3$.

Which element was not known when Mendeleev gave his classification?

chemistry the periodic table mendeleef's periodic table mendeleev's periodic law and its limitations mendeleev's periodic table development of the modern periodic table into the history

  1. Germanium

  2. Gallium

  3. Scandium

  4. All of the above

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Correct Option: D
Explanation:

The elements which were unknown when Mendeleev gave his classification were geranium, gallium and scandium. He left gaps for the unknown elements and predicted correctly the properties of some of the unknown elements.

Which periods were not divided into two series in the Mendeleev's periodic table?

chemistry the periodic table mendeleef's periodic table mendeleev's periodic law and its limitations mendeleev's periodic table development of the modern periodic table into the history

  1. $4$

  2. $5$

  3. $6$

  4. None of the above

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Correct Option: D
Explanation:

$4^{th}$, $5^{th}$ and $6^{th}$ period were divided into two series: first series and second series.

Mendeleev used a Sanskrit numeral before the names of the predicted elements. What was the term used for it?

chemistry the periodic table mendeleef's periodic table mendeleev's periodic law and its limitations mendeleev's periodic table development of the modern periodic table into the history

  1. Sasi

  2. Eka

  3. Astan

  4. Pancan

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Correct Option: B
Explanation:

A Sanskrit numeral used before the names of the predicted elements was Eka which means one.

The elements having more masses were placed before elements having lower masses in Mendleev's periodic table. Guess the pair of elements (higher mass, lower mass).

chemistry the periodic table mendeleef's periodic table mendeleev's periodic law and its limitations mendeleev's periodic table development of the modern periodic table into the history

  1. Cobalt, Nickel

  2. Vanadium, Chromium

  3. Tellurium, Iodine

  4. All of the above

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Correct Option: D
Explanation:

The elements having more masses were placed before elements having lower masses were cobalt, vanadium, tellurium. Its corresponding elements were nickel, chromium and iodine.