Chemistry Question Bank

Which of the following gases may act both as an oxidizing and a reducing agent?

H₂SO₄ is manufactured from SO₂(g) by the

In which case is number of molecules of water maximum? (NEET 2018)

An organic compound contains 78% (by wt.) carbon and remaining percentage of hydrogen. The right option for the empirical formula of this compound is: [Atomic wt. of C is 12, H is 1] (NEET 2021)

Which one of the following has maximum number of atoms? (NEET 2020)

Suppose elements X and Y combine to form two compounds XY₂ and X3Y₂. When 0.1 mol of XY₂ weighs 10g and 0.05 mol of X3Y₂ weighs 9g, the atomic weights of X and Y are (NEET 2016)

What is the mass of the precipitate formed when 50 mL of 16.9% solution of AgNO₃ is mixed with 50 mL of 5.8% NaCl solution? (Ag = 107.8, N = 14, O = 16, Na = 23, Cl = 35.5) (NEET 2015)

20.0 g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0g magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample ? (NEET 2015)

A mixture of gases contains H and O gases in the ratio of 1 : 4 (w/w). What is the molar ratio of the two gases in the mixture ? (NEET 2015)

O Thus, 1.0 g Mg reactis with 0.67 . g O But only 0.56g O is available which less than 0.67 g is. Thus, O . is the limiting reagent. MOLE & EQUIVALENT CONCEPT Further, 16g O reacts with 24g of Mg. 0.56g O will react w…

1.0 g of magnesium is burnt with 0.56 g O₂ in a closed vessel. Which reactant is left in excess and how much? (At. wt. Mg = 24, O = 16) (NEET 2014)

When 22.4 litres of H₂(g) is mixed with 11.2 litres of Cl₂(g), each at STP, the moles of HCl(g) formed is equal to (NEET 2014)

Equal masses of H₂, O₂ and methane have been taken in a container of volume V at temperature 27°C in identical conditions. The ratio of the volumes of gases H₂ : O₂ : methane would be (NEET 2014)

20.0 kg of N₂(g) and 3.0 kg of H₂(g) are mixed to produce NH₃ (g). The amount of NH₃(g) formed is (Kerala CEE 2011)

60g of a compound on analysis produced 24g of carbon, 4g hydrogen and 32g oxygen. The empirical formula of the compound is. (BVP 2010)

The number of atoms in 0.1 mol of a triatomic gas is ( A N =6.022×10 ) (CBSE AIPMT 2010)

A mixture of CaCl₂ and NaCl weighing 4.44 g is treated with sodium carbonate to precipitate all the Ca²⁺ ions as calcium carbonate. The calcium carbonate so obtained is heated strongly to get 0.56 g of CaO. The percen…

Volume of a gas at NTP is 1.12×10–7 cm3. The number of molecules in it is (Manipal 2010)

If 1 mL of water contains 20 drops the number of molecules in a drop of water is (AFMC 2010)

74.5 g of a metallic chloride contain 35.5 g of chlorine. The equivalent weight of the metal is (Manipal 2010)

To dissolve 0.9 g metal, 100 mL of 1N HCl is used. What is the equivalent weight of metal? (MP PMT 2010)

In an experiment, 4 g of M2Ox oxide was reduced to 2.8 g of the metal. If the atomic mass of the metal is 56 g mol–1, the number of O atoms in the oxide is (AFMC 2010)

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 (AIPMT 2009)

The volume of 2 N H₂SO₄ solution is 0.1 dm3. The volume of its decinormal solution (in dm3) will be (MHT CET 2009)

A bivalent metal has an equivalent mass of 32. The molecular mass of the metal nitrate is (KCET 2009)