Text Solution
AI Generated Solution
|
ICSE-SPECIMEN PAPER 3-SECTION II
- Give reasons for the following Nitric acid is not preferred in lab. ...
01:27
|
- Copper sulphate crystals are heated strongly in a hard glass test tube...
01:50
|
- What do you understand by Hard water
03:08
|
- What are the causes for Permanent hardness
02:30
|
- Explain one method of removing permanent hardness.
03:01
|
- Give the equation for the lab preparation of hydrogen.
03:01
|
- Why the solid reactant is used in granulated form ?
01:38
|
- How is the gas recognised ?
01:38
|
- Mention any two impurities present in hydrogen prepared in laboratory.
03:05
|
- How are these impurities removed ?
01:53
|
- State three precautions taken in preparing hydrogen.
03:38
|
- Give three main characteristics of representative elements.
04:00
|
- Give the physical state of the last group members of the modern period...
03:10
|
- Elements X, Y and Z have atomic numbers 6, 9 and 12 respectively. Whi...
02:11
|
- Account for the following : Though lead is above hydrogen in the act...
03:45
|
- Account for the following : Potassium and sodium are not used to rea...
02:18
|
- Account for the following : Isotopes of an element possess identical...
03:46
|
- Distinguish by flame test : Sodium chloride and potassium chloride.
02:32
|
- State the effect of temperature on solubility of the following: Calc...
02:05
|
- State the effect of temperature on solubility of the following: Pota...
02:01
|
- State the effect of temperature on solubility of the following: Sodi...
03:38
|