Question
The following table shows electronic configuration
The following table shows electronic configuration: Element Electronic configuration A 2,8,8,2 B 2,6 C 2,8,7 D 2,4 (a) Write the formula of…
Resource archive
Archives: Questions
Browse learning resources, explanations and study material.
Latest resources
Open any card to continue learning.
Question
Ammonia burns in oxygen
Ammonia burns in oxygen as shown below. If 240 cc of ammonia is burnt in 300 cc of oxygen, find out the…
Question
Rita was given an unknown salt for identification
Rita was given an unknown salt for identification. She prepared a solution of the salt and divided it into two parts. To…
Question
Fill in the blanks by choosing the correct answer from the bracket
Fill in the blanks by choosing the correct answer from the bracket: (a) Carbon tetrachloride is a …………… [polar / non-polar] covalent…
Question
Identify the following
Identify the following: (a) An element in period 1 which can be placed in both group 1 and group 17 of the…
Question
Arrange the following as per the instructions given in the brackets
Arrange the following as per the instructions given in the brackets: (a) Carbon, Fluorine, Beryllium (decreasing order of atomic size) (b) Sulphuric…
Question
Give reasons for the following: (a) Inert gases do not form ions. (b) Covalent compounds have a low melting and boiling point.
Give reasons for the following: (a) Inert gases do not form ions. (b) Covalent compounds have a low melting and boiling point.
Question
From the above reactions X or Y, identify the reaction which exhibits electrolytic dissociation and ionization
X – HCl ⇋ H1+ + Cl– (in solution state) Y – PbBr2 ⇋ Pb2+ + 2Br1- (in molten state) From the…
Question
Identify the gas evolved in each of the following reactions
Identify the gas evolved in each of the following reactions: (a) Methane undergoes complete combustion. (b) Copper carbonate is heated. (c) MnO2…
Question
Calcium carbonate reacts with dilute hydrochloric acid as given below
Calcium carbonate reacts with dilute hydrochloric acid as given below: (a) What is the mass of 5 moles of calcium carbonate? (Relative…