Previous year questions with solutions · 2000 – 2026
| Year | Questions | Papers | Avg / paper | Weightage |
|---|---|---|---|---|
| 2026 | 4 | 2 | 2 | 4.44% same as last year |
| 2025 | 2 | 1 | 2 | 4.44% ▼ 11.1% vs last year |
| 2024 | 5 | 2 | 2.5 | 5.00% ▲ 155% vs last year |
| 2023 | 1 | 1 | 1 | 1.96% ▼ 34% vs last year |
| 2022 | 3 | 2 | 1.5 | 2.97% ▲ 48.5% vs last year |
| 2021 | 1 | 1 | 1 | 2.00% ▼ 10% vs last year |
| 2020 | 1 | 1 | 1 | 2.22% same as last year |
| 2019 | 1 | 1 | 1 | 2.22% ▼ 50% vs last year |
| 2018 | 2 | 1 | 2 | 4.44% ▲ 300% vs last year |
| 2016 | 1 | 2 | 0.5 | 1.11% ▼ 80% vs last year |
| 2015 | 5 | 2 | 2.5 | 5.56% ▼ 16.7% vs last year |
| 2014 | 3 | 1 | 3 | 6.67% ▲ 97.8% vs last year |
| 2013 | 3 | 2 | 1.5 | 3.37% ▲ 173% vs last year |
| 2011 | 1 | 2 | 0.5 | 1.23% ▼ 50.6% vs last year |
| 2010 | 2 | 2 | 1 | 2.50% ▲ 27.5% vs last year |
| 2009 | 1 | 1 | 1 | 1.96% ▼ 75% vs last year |
| 2008 | 4 | 1 | 4 | 7.84% ▲ 96.1% vs last year |
| 2007 | 2 | 1 | 2 | 4.00% ▲ 92% vs last year |
| 2004 | 1 | 1 | 1 | 2.08% ▲ 2.1% vs last year |
| 2003 | 1 | 1 | 1 | 2.04% ▼ 66% vs last year |
| 2002 | 3 | 1 | 3 | 6.00% ▲ 2% vs last year |
| 2001 | 3 | 1 | 3 | 5.88% ▲ 200% vs last year |
| 2000 | 1 | 1 | 1 | 1.96% |
⚠ 3 of these questions are out of the current syllabus (marked on the question).
How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2.0 M HNO3? The concentrated acid is 70\% HNO3.
In an experiment it showed that 10 mL of 0.05 M solution of chloride required 10 mL of 0.1 M solution of AgNO3, which of the following will be the formula of the chloride (X stands for the symbol of the element other than chlorine)
Which has the maximum number of molecules among the following ?
The number of atoms in 0.1 mol of a triatomic gas is ( NA = 6.02 1023 mol-1)
25.3 g of sodium carbonate, Na2CO3 is dissolved in enough water to make 250 mL of solution. If sodium carbonate dissociates completely, molar concentration of sodium ion, Na+ and carbonate ions, CO32- are respectively (Molar mass of Na2CO3 = 106 g mol-1)
10 g of hydrogen and 64 g of oxygen were filled in a steel vessel and exploded. Amount of water produced in this reaction will be
What volume of oxygen gas (O2) measured at 0 C and 1 atm, is needed to burn completely 1 L of propane gas (C3H8) measured under the same conditions?
How many moles of lead (II) chloride will be formed from a reaction between 6.5 g of PbO and 3.2 g of HCl?
An organic compound contains carbon, hydrogen and oxygen. Its elemental analysis gave C, 38.71% and H, 9.67%. The empirical formula of the compound would be
Volume occupied by one molecule of water (density = 1 g cm-3) is
An element, X has the following isotopic composition: 200X : 90\% 199X : 8.0\% 202X : 2.0\% The weighted average atomic mass of the naturally occurring element X is closest to
Concentrated aqueous sulphuric acid is 98% H2SO4 by mass and has a density of 1.80 g mL-1. Volume of acid required to make one litre of 0.1 M H2SO4 solution is
The maximum number of molecules is present in
In Haber process 30 litres of dihydrogen and 30 litres of dinitrogen were taken for reaction which yielded only 50% of the expected product. What will be the composition of gaseous mixture under the aforesaid condition in the end ?
The percentage of C, H and N in an organic compound are 40%, 13.3% and 46.7% respectively then empirical formula is
2.5 litre of 1 M NaOH solution is mixed with another 3 litre of 0.5 M NaOH solution. Then find out molarity of resultant solution.
Percentage of Se in peroxidase anhydrous enzyme is 0.5\% by weight (at. wt. = 78.4), then the minimum molecular weight of peroxidase anhydrous enzyme is
Molarity of liquid HCl, if density of solution is 1.17 g/cc, is
Specific volume of cylindrical virus particle is 6.02 10-2 cc/g whose radius and length are 7 A and 10 A respectively. If NA = 6.02 1023, find molecular weight of virus.
Volume of CO2 obtained by the complete decomposition of 9.85 g of BaCO3 is