List of top Chemistry Questions

A sample of gas absorbs 4000 kJ of heat and surrounding does 2000 J of work on sample, what is the value of \(\Delta U\)?
Which of the following compounds is NOT isomeric with ethoxy ethane?
What is the colour of solution obtained when 2-Nitropropane reacts with nitrous acid?
What is the mass of solute (molar mass 39) in 156 g of benzene, if mole fraction of solute in benzene is 0.2? (at wt C=12, H=1, O=16)
Hydroxide of which alkali metal is used in manufacture of soft soap?
Resistance of 0.1 M KCl solution in a conductivity cell is 300 ohm and conductivity is 0.013 S cm\(^{-1}\). What is the cell constant?
6.022 × 10\(^23\) molecules of glucose are present in 100 mL of its aqueous solution, what is the concentration of this solution?
When will the reaction become spontaneous at all temperatures?
What is the freezing point of a solution containing 1.8 g glucose dissolved in 1000 g of water (Kf of water = 1.86 K kg mol\(^{-1}\) and at mass C=12, H=1, O=16)?
What is the number of carbon atoms present in the leaves?
Identify the number of carbon atoms and number of oxygen atoms respectively present in pyran molecule.
Which type of overlap is involved in formation of C-H bond in ethene molecule?
An element crystallizes with hcp structure with atomic radius 17-32 nm. What is the edge length of unit cell?
What is the highest oxidation state possible for a transition element?
A metallic element has a cubic lattice with edge length of unit cell 2Å. Calculate the number of unit cells in 200 g of the metal, if the density of metal is 2.5 g cm\(^{-3}\)?
What is the symbol of an element having atomic number 113?
The conductivity of 0.01 M salt solution is 1.061 × 10\(^{-4}\) S cm\(^{-1}\). What is molar conductivity of the solution?
How many donor groups are present in dimethyl glyoximato?
The volume of given mass of a gas at 'x' K is 2 dm\(^3\). What is the new volume of gas at constant pressure, if temperature is increased to 10x K?
What is the value of dipole moment for HCl molecule?
Which of the following compounds forms a colloidal solution when dissolved in water?
Aniline on reaction with Bromine water at room temperature gives:
Heat of formation of H\(_2\)O is = -270 kJ mol\(^{-1}\). How much water can be decomposed by 675 kJ of heat?
Which of the following is a property of coordination compound and not of double salt?
Which among the following is a tear gas?