CBSE · Chemistry
Some Basic Concepts of Chemistry
443 practice questions for CBSE — 246 easy · 151 medium · 46 hard. Every question is graded instantly with a step-by-step solution when you miss it.
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MCQ
What is the number of moles of Cl atoms present in n moles of tear gas and in n moles of mustard gas respectively?
MCQ
Calculate the mass of potassium chlorate required to liberate $6.72$ dm$^3$ of oxygen at STP. [Molar mass of potassium chlorate $= 122.5$ g mol$^{-1}$]
MCQ
Find the mass of lime obtained by heating 500 g of $90\%$ pure lime stone. [Molar masses $\text{Ca}=40$ g/mol, $\text{O}=16$ g/mol $\&$ $\text{C}=12$ g/mol]
MCQ
What is the gram atomic mass of an element whose mass of one atom is $3.9853 \times 10^{-23}\ \text{g}$?
MCQ
A coordination complex contains $2.6\ \%$ of Mg. Find the number of Mg atoms in $5.0$ g of this sample. (gram atomic mass of Mg $= 24$ g)
MCQ
Calculate the number of atoms in 52 moles of argon?
MCQ
Which of the following gases has high vapour density at same temperature and pressure?
MCQ
Which of the following compounds has maximum number of molecules ?
MCQ
Find the mass of 1 molecule of $\text{H}_2\text{SO}_4$ in grams?
MCQ
Calculate the number of moles and molecules of chlorine in $4.48\ \text{dm}^3$ of chlorine at STP?
MCQ
Calculate the total mass and number of molecules present in 3 moles of benzene?
MCQ
Calculate the number of carbon atoms present in $11$ g of carbon dioxide?