NDA || SCIENCE || CHEMISTRY || MINI MOCK

Consider the following reaction

x Mg(OH)₂(aq) + y H₃ PO₄ (aq)  z H₂ O (l) + Mg₃ (PO₄)₂ (aq)

Find the value of coefficient of H₂O when equation is in balanced condition?

Choose the option which is not the example of the mixture?

Which one of the following is the correct electronic configuration of chlorine?

If the reaction of 1.0 mol NH₃ (g) and 1.0 mol O₂ (g)

4NH₃ (g) + 5O₂ (g) → 4NO (g) + 6H₂O (l)

is carried to completion, then

A sample of gas is to be identified by means of its behaviour in the presence of a glowing splint. Which of the following gases will neither itself burn nor cause the splint to burn?

Which one of the following substances is most likely to be used as soap?

Ammonia (NH₃) obtained from different sources always has the same proportion of Nitrogen and Hydrogen. It proves the validity of law of:

Which one of the following carbon compounds will not give a sooty flame?

Sulphur dioxide and hydrogen peroxide act as oxidising as well as reducing agents but, ozone and nitric acid act only as oxidants. Select the correct reason from the following statements.

Rusting of iron objects is faster in the coastal area is due to:

Choose the incorrect option/options from the statements listed below when milk changes into curd?

(i) The taste remains the same.

(ii) Lactic acid is formed.

(iii) It changes colour.

(iv) The change cannot be reversed.

The LPG cooking gas contains propane and butane as the constituents. A sulfur-containing compound is added to the LPG, because

Match List I with List II and select the correct answer using the code given below the Lists :

Which one of the following elements is used in pencil-lead?

Sodium chloride has a melting point of 801 °C, but water melts at just 0 °C. This is due to: