NDA || Chemistry_Quiz_2020

The compound C₆H₁₂O₄ contains –

Compound Y is formed after an element X is exposed to moist air and turned reddish-brown colour. The substance X and Y are

Which of the following states that equal volumes of different gases contain equal number of molecules at the same temperature and pressure?

Calcium carbonate is naturally available as limestone and can also be synthesized from quick lime. It is seen that the composition of elements in both the natural and synthetic calcium carbonate are the same. This observation gives the validity of the law,

After the boiling water, bubbles get to rise to the surface are composed of,

Consider the following sentences and choose the correct answer:

1) Water boils at high altitude and lower temperature because of less latent heat

2) The density of ice is greater than of water

3) The pH value of fresh ground water is slightly decreases when it comes to air

Match column I with column II and select the correct answer choosing the code given below:

Consider the following reaction:

Fe₃O₄ + 4H₂ → 3Fe + 4H₂O

Which of the following about the reaction given above is/are correct?

1) Iron is oxidized

2) Hydrogen is oxidised

3) Iron is reduced

4) Hydrogen is reduced

Which of the following properties is not true for Graphite?

Consider the following sentences:

1) Potassium sulphate and potassium nitrate is an example of fertilisers.

2) Ca(CN)₂, urea and CaCN₂ come under the example of nitrogenous fertilisers.

Choose the correct options given below: