Test Details

Periodic Classification of Elements

Easy to moderate

Feb 05, 8:00 PM

25 minutes

Feb 05, 8:30 PM

45.0 marks

MCQ

20 questions

rahul panday

Class Details

Math

Science

Class -10

Math

Science

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Question Text

Question 1 :
Mendeleev used a Sanskrit numeral before the names of the predicted elements. What was the term used for it?

Question 6 :
The elements $A, B, C, D\ and \ E $ have atomic number 9, 11,17,12 and 13, respectively. Which pair of elements belongs to the same group?

Question 7 :
If the difference in the size of $Na^+$ and $Li^+$ is $X$ $\overset{o}{A}$ and $Cs^+$ and $Na^+$ is $Y$ $\overset{o}{A}$ respectively. Then the difference in the size of $Cs^+$ and $Li^+$ is:

Question 8 :
In the given reaction, the oxide of sodium is: $(4Na+O_{2} \rightarrow 2Na_{2}O $ $Na_{2}O +H_{2}O\rightarrow 2NaOH)$

Question 9 :
Which one has the positive value of electron affinity: $ F$ or $ O^-$ ?

Question 10 :
The correct decreasing order of electropositive character among the following elements is :    $ Fe, Sc, Rb, Br, Te, F , Ca $

Question 12 :
Point out the wrong statement: On moving horizontally from left to right across a period in the periodic table

Question 13 :
When radium atom which is placed in II group, loses an $\alpha$ -particle, new element is formed which should be placed in group?

Question 14 :
Which of the following set of elements is writtenin order of their increasing metallic character?

Question 15 :
Where would you locate the element with electronic configuration 2,8 in the modem period table?

Question 16 :
Non-metals will be out of elements with atomic number $13, 31, 35, 54$.

Question 18 :
Which of the following series correctly represents relations between the elements from X to Y? $X \rightarrow Y$

Question 19 :
The resistance of 1N solution of acetic acid is 250Ω when measured in a cell having a cell constant of 1.15 $cm^{-1}$. The equivalent conduction (in $ohm^{-1} cm^{2} equiv^{-1}$) of 1N acetic acid is

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