Question 6 :
Cl₂ +.........+ 2H₂O{tex}\rightarrow{/tex}H₂SO₄+ 2 HCl is a balanced chemical equationChoose the correct option.

Question 8 :
...............suggested that initial letter of an element written in capitals should represent that particular element

Question 10 :
Dalton used symbol of a circle with a dot in its structure to represent.

Question 12 :
Which of the following statement(s) about the modern periodic table are incorrect?<br>IThe elements in the modern periodic table are arranged on the basis of their decreasing atomic number.<br>IIThe elements in the modern periodic table are arranged on the basis of their increasing atomic masses.<br>IIIIsotopes are placed in adjoining group (s) in the periodic table.<br>IVThe elements in the modern periodic table are arranged on the basis of their increasing atomic number.

Question 21 :
Which of the element of group 17 is solid in nature?

Question 22 :
The number of electrons in the valence shell of an atom represents its........

Question 23 :
Which type of elements are shown in bottom of periodic table?

Question 27 :
Which scientist proposed that electrons revolve in distinct energy level around nucleus?

Question 33 :
Identify the isotope which is used for determining the age of historical and geological material.

Question 34 :
How many electrons do the outermost shell of an atom accommodate?

Question 35 :
To attain the stable electronic configuration of the nearest noble gas, chlorine needs...............electron,