Which of the following metals corrodes in moist air
(a) Fe
(b) Au
(c) Ag
(d) Ni
Answer:
Chalcopyrite is an ore of
(a) Gallium
(b) Magnesium
(c) Copper
(d) Calcium
Answer:
Silicon is the main constituent of
(a) plants
(b) Animals
(c) Rocks
(d) Aloys
Answer:
Plaster of Paris is made from
(a) Gypsum
(b) Limestone
(c) Marble
(d) Bauxite
Answer:
Reverse of swelling of gel is known as
(a) Sorption
(b) Synersis
(b) Thixotropy
(d) None of these
Answer:
Which one of the following elements is used as common catalyst
(a) Ga
(b) Ni
(c) B
(d) Ge
Answer:
The ability of a catalyst to accelerate the chemical reaction is known as
(a) Positive catalysis
(b) Selectivity
(c) Activity
(d) None of these
Answer:
Which of the following cell is a secondary cell
(a) Ni cell
(b) Fuel cell
(c) Dry cell
(d) Mercury cell
Answer:
In galvanization, iron is coated with
(a) Nickel
(b) Tin
(c) Copper
(d) Zinc
Answer:
The number of mole of solute per litre solution is called
(a) Molarity
(b) Mole fraction
(c) Molality
(d) Normality
Answer: