Question 2 :
The optically active tartaric acid is named as {tex} D{/tex} - {tex} ( + ) {/tex} - tartaric acid because it has a positive

Question 3 :
A compound whose molecules are superimposable on their mirror images even through they contain an asymmetric carbon atom is called

Question 5 :
What is the quantity of water that should be added to 16 g. methanol to make the mole fraction of methanol as 0.25 :<br>

Question 6 :
Number of atoms in 560g of Fe (atomic mass 56g mol-1) is :<br>

Question 7 :
Out of the given reactive intermediates which will be attracted towards the magnetic field?

Question 8 :
During hearing of a court case, the judge suspected that some changes in the documents had been carried out. He asked the forensic department to check the ink used at two different places. According to you which technique can give the best results?<br>

Question 9 :
In which of the following pairs do 1 g of each have an equal number of molecules?<br>

Question 10 :
If 500 ml of 1 M solution of glucose is mixed with 500 ml of 1 M solution of glucose final molarity of solution will be :<br>

Question 11 :
2M of 100 ml Na2 SO₄ is mixed with 3M of 100 ml NaCl solution and 1M of 200 ml CaCl₂ solution. Then the ratio of the concentration of cation and anion.<br>

Question 12 :
Cortisone is a molecular substance containing 21 atoms of carbon per molecule. The mass percentage of carbon in cortisone is 69.98%. Its molar mass is :<br>

Question 14 :
Under the same conditions, two gases have the same number of molecules. They must <br>

Question 15 :
Molarity of H₂SO₄ is 18 M. Its density is 1.8 g/cm3, hence molality is<br>

Question 16 :
Cortisone is a molecular substance containing 21 atoms of carbon per molecule. The mass percentage of carbon in cortisone is 69.98%. Its molar mass is :<br>

Question 18 :
How many isomers of {tex} \mathrm {C _ { 5 } H _ { 11 } O H} {/tex} will be primary alcohols

Question 19 :
Mole fraction of ethyl alcohol in aqueous ethyl alcohol (C2H5OH) solution is 0.25. Hence percentage of ethyl alcohol by weight is :<br>

Question 21 :
Rate of the reaction<br><img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5e7995f2d3f9ab617fcdc9b9' height='57' width='233' ><br>is fastest when Z is <br>

Question 22 :
Freshly prepared solution of sodium nitroprusside is added to the sodium extract. Appearance of a deep violet colour indicates the presence of. <br>

Question 23 :
{tex}\mathrm{Assertion}{/tex} : Olefins have the general formula {tex} C _ { n } H _ { 2 n + 1 } {/tex}<br>{tex}\mathrm{Reason}{/tex} : There is one double bond between two carbon atoms in their molecules.<br>

Question 26 :
Which one of the following conformation of cyclohexane is chiral ?[2007]<br>

Question 27 :
On mixing 15.0 ml of ethyl alcohol of density 0.792 g ml -1 with 15 ml of pure water at 40 C, the resulting solution is found to have a density of 0.924 g ml -1. The percentage contraction in volume is :<br>

Question 28 :
In which of the following reactions is there a possibility of rearrangement?<br>

Question 30 :
What volume of a 0.8 M solution contains 100 milli moles of the solute?<br>

Question 31 :
If 1.5 moles of oxygen combine with Al to form Al₂O₃, the weight of Al used in the reaction is : <br>

Question 32 :
Which of the following represents the correct order of stability of the given carbocations?<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5ddfba45f197791516a5fdcc"><br>

Question 34 :
The molar mass of normal water is .......... as compared to heavy water.<br>

Question 35 :
The molarity of Cl&macr; in an aqueous solution which was (w/V) 2% NaCl, 4% CaCI₂ and 6% NH₄Cl will be<br>

Question 37 :
Which of the following correctly depicts the bond line and condensed structure of the compounds? <br>(i) 2,2,4- Trimethylpentane, <br><img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5e799569c6cb6261b35b3d6f' height='64' width='232' ><br>(ii) Hexanedial,<br><img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5e799569d3f9ab617fcdc756' height='46' width='260' ><br>(iii) 2 - Hydroxypropane - 1,2,3 - tricarboxylic acid, <br><img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5e79956aadb2ea6185a775c7' height='71' width='251' ><br>

Question 38 :
Four 1-1 litre flasks are separately filled with the gases H₂, He, O₂ and O₃ at the same temperature and pressure. The ratio of total number of atoms of these gases present in different flask would be :<br>

Question 39 :
What is the maximum number of open chain structures possible for<br>{tex} C _ { 4 } H _ { 8 } {/tex}<br>

Question 40 :
12 g of alkaline earth metal gives 14.8 g of its nitride. Atomic weight of metal is -<br>

Question 41 :
A sample of ammonium phosphate (NH₄)3PO₄ contains 3.18 mol of H atoms. The number of mol of O atoms in the sample is :<br>

Question 42 :
The IUPAC name of <img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5e7995fac6cb6261b35b3ff0' height='73' width='' > is

Question 43 :
Which of the following alkyl groups has the maximum {tex} + 1 {/tex} effect

Question 44 :
0.5 mole of H₂SO₄ is mixed with 0.2 mole of Ca (OH)₂. The maximum number of moles of CaSO₄ formed is<br>

Question 45 :
The ratio of the weight of one litre of a gas to the weight of 1.0 L oxygen gas both measured at S.T.P. is 2.22. The molecular weight of the gas would be :<br>

Question 46 :
How many liters of CO₂ at STP will be formed when 0.01 mol of H₂SO₄ reacts with excess of Na2CO₃ .<br>Na2CO₃ + H₂SO₄ Na2SO₄ + CO₂ + H₂O<br>