Chemistry - MOST IMPORTANT HP PCS Previous Year Questions

Presence of oxygen

Action of aerobic micro-organisms

Action of anaerobic micro-organisms

Presence of fertilizers

(ii), (i), (iv), (iii)

(i), (iii), (iv), (ii)

(i), (ii), (iv), (iii)

(ii), (iv), (i), (iii)

Benzene

Acetone

Acetic acid

Petroleum ether

Separation of grain from stalk

Separation of components from mixture

Separation of large sized impurities

Separation of water vapour from liquid

Red

Yellow

Blue

Purple

All bases are soluble in water

All bases do not dissolve in water

An alkali is a base that dissolves in water

Bases generate hydroxide (OH–) ions in water

Potential

Property

Power

Potenz

Gastric juice

Blood

Milk of magnesia

Sodium chloride solution

($\displaystyle 4$), ($\displaystyle 3$), ($\displaystyle 2$), ($\displaystyle 1$)

($\displaystyle 3$), ($\displaystyle 4$), ($\displaystyle 1$), ($\displaystyle 2$)

($\displaystyle 2$), ($\displaystyle 4$), ($\displaystyle 1$), ($\displaystyle 3$)

($\displaystyle 1$), ($\displaystyle 2$), ($\displaystyle 3$), ($\displaystyle 4$)

Lemon juice

Vinegar

Baking soda

Blue berry juice

Calcium oxide reacts vigorously with water to produce lime

Slaked lime slowly creates a layer of calcium nitrate on the walls during white washing

Silver chloride is sensitive to sunlight

Decomposition reactions require energy for breaking down of reactants

Helium

Neon

Xenon

Argon

Horn Silver

German Silver

Ruby Silver

Lunar Silver

Both Statement I and Statement II are correct

Both Statement I and Statement II are incorrect

Statement I is correct and Statement II is incorrect

Statement I is incorrect and Statement II is correct

A-$\displaystyle 4$, B-$\displaystyle 3$, C-$\displaystyle 1$, D-$\displaystyle 2$

A-$\displaystyle 4$, B-$\displaystyle 3$, C-$\displaystyle 2$, D-$\displaystyle 1$

A-$\displaystyle 3$, B-$\displaystyle 4$, C-$\displaystyle 1$, D-$\displaystyle 2$

A-$\displaystyle 2$, B-$\displaystyle 3$, C-$\displaystyle 4$, D-$\displaystyle 1$