CBSE
Multiple Choice QuestionsThe system that contains the maximum number of atoms is
4.25 g of NH3
8 g of O2
2 g of H2
4 g of He
An excess of AgNO3 is added to 100 mL of a 0.01 M solution of dichlorotetraaquachromium (III) chloride. The number of moles of AgCl precipitate would be
0.001
0.002
0.003
0.01
Long Answer TypeIn 'x' mL 0.3 N HCl, the addition of 200 mL distilled water or addition of 100 mL 0.1 N NaOH, gives the same final acid strength. Determine 'x'.
Multiple Choice QuestionsThe volume of ethyl alcohol (density 1.15 g/cc) that has to be added to prepare 100 cc of 0.5 M ethyl alcohol solution in water is
1.15 cc
2 cc
2.15 cc
2.30 cc
How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2.0M HNO3 ? The concentrated acid is 70% HNO3.
45.0 g conc. HNO3
90.0 g con. HNO3
70.0 g conc. HNO3
54.0 g conc. HNO3
6.02 x 1020 molecules of urea are present in 100 mL of its solution. The concentration of solution is
0.02 M
0.01 M
0.001 M
0.1 M
If 0.189 g of a chlorine containing organic compound gave 0.287 g of silver chloride, then the percentage of chlorine in the organic compound is
35.47
35.57
37.57
45.37
Long Answer TypeCompound A treated with NaNH2 followed by CH3CH2Br gave compound B. Partial hydrogenation of compound B produced compound C, which on ozonolysis gave a carbonyl compound D, (C2H5O). Compound D did not respond to the iodoform test with I2/KI and NaOH. Find out the structures of A, B, C and D.
Multiple Choice Questions2 g of metal carbonate is neutralised completely by 100 mL of 0.1 N HCI. The equivalent weight of metal carbonate is:
50
100
150
200
The weight of oxalic acid that will be required to prepare a 1000 ml (N/20) solution is:
126/100 g
63/40 g
63/20 g
126/20 g
