Advertisements
Advertisements
प्रश्न
In which of the following industries, microbial enzymes are not used?
a) Glass industry.
b) Cheese industry
c) Tanning industry.
d) Paper industry.
उत्तर
a) Glass industry.
APPEARS IN
संबंधित प्रश्न
You are given a hammer, a battery, a bulb, wires and a switch.
- How could you use them to distinguish between samples of metals and non-metals?
- Assess the usefulness of these tests in distinguishing between metals and non-metals.
Name one metal and one non-metal which exist in liquid state at room temperature.
State five uses of non-metals.
State one use of Carbon (as Graphite).
Name a non-metal having lustre (shining surface).
"Is malleable and ductile". This best describes:
(a) a metal
(b) a compound
(c) a non-metal
(d) a solution
(a) Give the names and formulae of one metal chloride and one non-metal chloride.
(b) State an important property in which these metal chloride and non-metal chloride differ.
(c) Why do they differ in this property?
Name a metal as precious as gold
Match the statements in Column A, with those in Column B .
| Column A | Column B | ||
| 1 | A metal used for making high quality mirrors . | a | Chlorine |
| 2 | A metal which neither malleable nor ductile. | b | Graphite |
| 3 | A non-metal,used in the sterilsation of water. | c | Iodine |
| 4 | A non-metal, whose deficiency can lead to disease like goitre. | d | Silver |
| 5 | A non -metal which can be used as dry lubricant. | e | Zinc |
Name the three classes in which elements are classified. Which was the first metal used by man?
What are metalloids: Give examples.
Name:
a non-metal which is ductile
Name:
a non- metal used in alloys
Select from the following ist:
`Fe_2O_3, , NO, PbO, Mn_2O_7`
Amphoteric oxide …………
Give the balanced reactions for the following:
Red hot iron reacts with steam
Give the balanced reactions for the following:
Iron reacts with dilute HCI
Complete the statement given below, by filling in the blank with the correct word:
A non-metal added to swimming pools to kill germs_____.
Select the appropriate option for the following statement:
The element which shows properties of both metals and non-metals.
The sound of one metal colliding with another makes a noise, this property is called as _______.
Tabulate the differences between metals and non-metals.
