Question
Which gas decolourises potassium permanganate (KMnO4) solution?
Which gas decolourises potassium permanganate (KMnO4) solution? (a) Sulphur dioxide (b) Ammonia (c) Hydrogen chloride (d) Carbon dioxide
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ICSE Class 10 Chemistry (Science Paper – 2) Solved Paper 2024
ICSE 2024 EXAMINATION QUESTION PAPER CHEMISTRY (SCIENCE PAPER – 2) Full Marks: 80 Time – Two Hours Answers to this Paper must…
Question
Laboratory preparation of hydrogen chloride gas
Hydrogen chloride gas is prepared in the laboratory by the action of concentrated sulphuric acid on sodium chloride. (a) Write the balanced…
Question
Match the following
Match the following: Column A Column B (a) ZnCl2 from Zn 1. Precipitation (b) KNO3 from KOH 2. Direct combination (c) CaCO3…
Question
Give balanced equations for the following
Give balanced equations for the following: (a) Copper reacts with concentrated Nitric acid. (b) Aluminium nitride is treated with warm water.
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Choose the correct answer from the list
Choose the correct answer from the list given below: zinc blende, C2H2, calamine, CH, haematite (a) The ore which is concentrated by…
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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…
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…
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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…