Chemistry Question Bank

One  of  the  statements  of  Dalton’s  atomic  theory  in given below “Compounds  are  formed  when  atoms  of  different elements combine in a fixed ratio” Which  of  the  following  laws  is  not  related  to  this…

In  1811,  Avogadro  proposed  that  equal  volumes  of gases  at  the  same  …A…  and  …B…  should  contain equal number of molecules. Here, A and B refer to

The  Gay  Lussac’s  law  was  explained  properly  by  the work of …A… in 1811. Here, A refers to

Which law states that if two elements can combine to form more than one compound, the masses of one element that combine with a fixed mass of other element, are in the ratio of small whole number?

Which law states that matter can neither be created nor destroyed?

What did Dalton’s Theory couldn’t explain?

Which of the following statement is false? (I) Matter consists of indivisible atoms. (II) All  the atoms of a given element have identical properties including identical mass. (III) Compounds are formed when atoms of …

…A… are  formed  when  atoms  of  different  elements combine in a …B… ratio. Here, A and B refer to

Assertion :Density  is  expressed  as  g  mL–1  whereas specific gravity is dimension less. Reason :Specific  gravity  is  ratio  of  the  masses  of solution and solvent.

Which of the following has the largest volume ?

How many significant figures does 63180 have?

The vapour density of a gas is 11.2. The volume occupied by one gram of the gas at STP is (Manipal – 2013)

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)

6.02 × 1020 molecules of urea are present in 100 mL of its solution. The concentration of solution is (NEET 2013)

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)

Assertion (A) Molarity of a solution depends upon temperature. Reason (R) Volume of a solution is temperature dependent entity.

The density of 2 M aqueous solution of NaOH is 1.28 g/cm3. The molality of the solution is [Given that molecular mass of NaOH = 40 g mol–1] (Odisha NEET 2019)

The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber’s process is (NEET 2019)

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

Which of the following is dependent on temperature? (NEET 2017)

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)