OMTEX CLASSES
“THE HOME OF SUCCESS”
Q1. A. Fill in the blanks.
1.
The formula of chloride of metal M is
MCl2. The metal M belongs to group ______
2.
The arrangement of elements in a group
of three is known as ________.
3.
The element eka – aluminum in
Mendeleev’s periodic table is known as _________in modern periodic table.
4.
The chemical formula of POP is_________.
5.
Corrosion can be prevented by using____________.
6.
The chemical reactions is which heat is
liberated are called _________reactions.
7.
Phenolphthalein is __________type of
indicator.
8.
pH scale ranges from ________to_________
9.
Sodium or potassium salts of higher
fatty acids are termed as _________
10. 10%
NaCl is known as__________.
Q2. Write short notes on
1.
pH scale (with proper diagram).
2.
Water of crystallization (with proper example)
Q3. Answer the following questions.
- State application (uses) of baking soda.
- In modern periodic table, which are the metals, non metals and
metalloids among the first 20 elements?
- Define atomic size. How does it vary in a period and in a group?
Q4. Give
Scientific reasons.
1.
Physical states of reactants and products are
mentioned while writing a chemical equation.
2.
Iron articles rust readily whereas steel which is
also mainly made of iron will not undergo corrosion.
3.
Edible oil is not allowed to stand for a long time
in air.
4.
Metallic character decreases from left to right in a
period.
