Carbon and its Compounds — Science STD 10 — Question

Food cans are coated with tin and not with zinc because.

Which of the following are exothermic processes?

1. Reaction of water with quick lime.
2. Dilution of an acid.
3. Evaporation of water.
4. Sublimation of camphor (crystals).

1. 1 and 2
2. 2 and 3
3. 1 and 4
4. 3 and 4

A hydrocarbon having one double bond has 100 carbon atoms in its molecule. The number of hydrogen atoms in its molecule will be:

1. 200
2. 198
3. 202
4. 196

The organic compounds which are isomeric with one another are:

1. Alcohols and aldehydes.
2. Aldehydes and carboxylic acids.
3. Ketones and aldehydes.
4. Alcohols and ketones.

Which of the following gives the correct increasing order of acidic strength?
a. Sodium chloride < Acetic acid < Hydrochloric acid
b. Sodium chloride < Hydrochloric acid < Acetic acid
c. Acetic acid < Sodium chloride < Hydrochloric acid
d. Hydrochloric acid < Sodium chloride < Acetic acid

The following reaction is an example of a:
4NH₃(g) + 5O₂ (g) → 4NO(g) + 6H₂O(g)

1. Displacement reaction.
2. Combination reaction.
3. Redox reaction.
4. Neutralisation reaction.

1. 1 and 4
2. 2 and 3
3. 1 and 3
4. 3 and 4

Zinc blende ore can be converted into zinc oxide by the process of:

Toothpastes are ____ in nature.

The first member of alkyne homologous series is:

1. Ethyne.
2. Ethene.
3. Propyne.
4. Methane.