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महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (इंग्रजी माध्यम) इयत्ता १० वी

The molecular formula of the chloride of an element X is XCl. This compound is a solid having a high melting point. Which of the following elements be present in the same group as X.

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प्रश्न

The molecular formula of the chloride of element X is XCl. This compound is a solid having a high melting point. Which of the following elements be present in the same group as X.

पर्याय

  • Na

  • Mg

  • Al

  • Si

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उत्तर

Molecular formula of the chloride of an element X is XCl. This compound is a solid having high melting point. An element to be present in the same group as X is Na.

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पाठ 2: Periodic Classification of Element - Exercise [पृष्ठ २८]

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बालभारती Science and Technology Part 1 [English] Standard 10 Maharashtra State Board
पाठ 2 Periodic Classification of Element
Exercise | Q 2. c. | पृष्ठ २८

संबंधित प्रश्‍न

An element P (atomic number 20) reacts with an element Q (atomic number 17) to form a compound. Answer the following questions giving reason:

Write the position of P and Q in the Modern Periodic Table and the molecular formula of the compound formed when P reacts with Q.


Rewrite the following statement after correction, if necessary:

Periods are the horizontal rows of elements.


An element X is in group 2 of the periodic table What will be the formula of its chloride?


An element Y is in second period and group 16 of the periodic table:

(i) Is it a metal or non-metal?
(ii) What is the number of valence electrons in its atom?
(iii) What is its valency?
(iv) What is the name of the element?
(v) What will be the formula of the compound formed by Y with sodium?


An element X combines with oxygen to form an oxide XO. This oxide is electrically conducting.

(a) How many electrons would be there in the outermost shell of the element X?
(b) To which group of the periodic tables does the element X belong?
(c) Write the formula of the compound formed when X reacts with chlorine.


A metal X is in the first group of the periodic table. What will be the formula of its oxide?


A non-metal X which is the largest constituent of air combines with hydrogen when heated in the presence of iron as catalyst to form a gas Y. When gas Y is treated with sulphuric acid, it forms a compound Z which is used as a chemical fertiliser.

(a) What are X, Y and Z?
(b) To which group of periodic table does X belong?
(c) Name the periodic table in which X is placed.
(d) Which element is placed just before X in the period?
(e) Which element is placed just after X in the period?


Rearrange the columns 2 and 3 so as to match with the column 1.

Column 1 Column 2 Column 3
i. Triad a. Lightest and negatively charged particle in all the atoms 1. Mendeleev
ii. Octave b. Concentrated mass and positive charge 2. Thomson
iii. Atomic number c. Average of the first and the third atomic mass 3. Newlands
iv. Period d. Properties of the eighth element similar to the first 4. Rutherford
v. Nucleus e. Positive charge on the nucleus 5. Dobereiner
vi. Electron f. Sequential change in molecular formulae 6. Moseley

In which block of the modern periodic table are the nonmetals found?


Give a reason why elements need to be properly classified.


The basis of the classifications proposed by Dobereiner, Newlands and Mendeleev was ______.


Example for liquid metal is ______.


Match the following

1. Galvanisation Noble gas elements
2. Calcination Coating with Zn
3. Redox reaction Silver-tin amalgam
4. Dental filling Alumino thermic process
5. Group 18 elements Heating in the absence of air

Identify the bond between H and F in the HF molecules.


What is the atomic number of elements of period 3 and group 17 of the Periodic Table?


Which one of the following statements is not correct about the trends in the properties of the elements of a group on going down in a group?


Which of the following metals have low melting and boiling point?


Complete the following triads by inserting the missing elements.

Li, ______, K


The atomic number of an element 'X' is 11.

  1. Write the electronic configuration of X and find its valency.
  2. Write the formula and nature of its oxide.

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