Choose the correct words to complete the following sentence :
Ammonia reacts with oxygen in two different ways depending upon the presence or absence of catalyst.

Choose the correct word/phrase from within the brackets to complete the following sentences : Ethanoic acid reacts with ethanol in presence of concentrated H_2SO_4 , so as to form a compound and water. The chemical reaction which takes place is called.... (dehydration / hydrogenation / esterification)

Choose the correct word from the brackets to complete the following sentences. Anions are discharged at the anode during electrolysis. The tendency of the anions to get [reduced / oxidised ] at the anode increases on (ascending / descending] the electrochemical series.

Choose the correct words to complete the following sentence : Ammonia is ............. (less/more) dense than air, therefore, it is collected by………...... (downward/upward) delivery.

Choose the correct word/phrase from within the brackets to complete the following sentences : The product formed when ethene gas reacts with water in the presence of sulphuric acid is ........ (ethanol / ethanal / ethanoic acid)

Choose the correct word/words to complete the following sentence : When sound travels in a medium ...... (the particles of the medium, the source, the disturbance, the medium) travels in form of a wave.

Choose the correct word/phrase from within the brackets to complete the following sentences : The catalyst used for conversion of ethene to ethane is commonly ............ (nickel / iron / cobalt)

Ethanol can be converted to ethene which can then be changed to ethane. Choose the correct word or phrase from the brackets to complete the following sentences: The catalyst used in the conversion of ethene to ethane is commonly - (iron/ nickel)

State your observation for the following cases : Ammonia gas is burnt in an atmosphere of oxygen in the absence of a catalyst.

Choose the correct word from the brackets to complete the sentences. Acid reacts with base to give salt and water. The reaction is known as __________ (Decomposition, Neutralisation, Displacement.)

Choose the correct word from the brackets to complete the sentence . Sodium nitrate reacts with ______ (consentraed /dilute)sulphuric acid to produce nitrc acid . Write equation for the same.