Arrange the following as per the instructions given in the brackets:
(a) Carbon, Fluorine, Beryllium (decreasing order of atomic size)
(b) Sulphuric acid, Phosphoric acid, Acetic acid (increasing order of number of replaceable H atoms per molecule)
(c) Potassium, Lithium, Sodium (increasing order of ionization potential)
(a) Beryllium > Carbon > Fluorine
(b) Acetic acid < Sulphuric acid < Phosphoric acid
(c) Potassium < Sodium < Lithium
More ICSE Moderate level questions
Complete and balance the following equations: (a) Al2O3 + 2NaOH ⟶ (b) C2H5COONa + NaOH ⟶ (c) C2H4Br2 + alcoholic KOH ⟶
Match the following: Column A Column B (a) ZnCl2 from Zn 1. Precipitation (b) KNO3 from KOH 2. Direct combination (c) CaCO3 from CaCl2 3. Displacement 4. Neutralization
Calcium carbonate reacts with dilute hydrochloric acid as given below: (a) What is the mass of 5 moles of calcium carbonate? (Relative molecular mass of calcium carbonate is 100) (b) How many moles of HCl will react with 5 moles of calcium carbonate? (c) What is the volume of carbon dioxide liberated at S.T.P. at the same time?
Mohan has three solutions P, Q and R having a pH of 13, 5 and 2 respectively. Which of the above solutions P, Q or R: (a) will react with Magnesium to liberate hydrogen gas? (b) will liberate ammonia gas when it reacts with ammonium chloride? (c) will contain molecules as well as ions?
Identify the following: (a) An element in period 1 which can be placed in both group 1 and group 17 of the Periodic Table. (b) The element having electronic configuration 2, 8, 6. (c) The most electronegative element of period 3.
Differentiate between the following pairs based on the criteria given: (a) Sulphuric acid and Nitric acid (using barium chloride solution) (b) Unsaturated and Saturated hydrocarbons (type of bond present)
Give reasons for the following: (a) Inert gases do not form ions. (b) Covalent compounds have a low melting and boiling point.
Rita was given an unknown salt for identification. She prepared a solution of the salt and divided it into two parts. To the first part of the salt solution, she added a few drops of ammonium hydroxide and obtained a reddish-brown precipitate. To the second part of the salt solution, she added a few drops of silver nitrate solution and obtained a white precipitate. Name: (a) the cation present and (b) the anion present in the salt given for identification.
Define the following terms: (a) Molar volume (b) Normal salt
Match the Column A with Column B: Column A Column B (a) Water 1. Lithium (b) Alkali metal 2. Iodine (c) Halogen 3. Covalent compound (d) Calcium oxide 4. Acetic acid (e) Weak acid 5. Ionic compound 6. Sulphuric acid
Arrange the following as per the instruction given in the brackets: (a) Al, K, Mg, Ca (decreasing order of its reactivity) (b) N, Be, O, C (increasing order of non-metallic character) (c) P, Si, F, Be (decreasing order of valence electrons)
Convert the following reactions into a balanced chemical equation: (a) Ammonia to nitric oxide using oxygen and platinum catalyst. (b) Sodium hydroxide to sodium sulphate using sulphuric acid. (c) Ferrous sulphide to hydrogen sulphide using hydrochloric acid.
