EASY
10th CBSE
IMPORTANT
Earn 100

Why do we store silver chloride in dark coloured bottles?

Important Questions on Sample Paper-4

EASY
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 9 - Sample Paper-4>Sample Paper-4>Q 3
Why is carbon not used for reducing aluminium oxide to obtain aluminium?
HARD
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 9 - Sample Paper-4>Sample Paper-4>Q 4
"Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate" 
(i) Translate the above statement into a chemical equation 
(ii) State two types in which the reaction can be classified.
EASY
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 9 - Sample Paper-4>Sample Paper-4>Q 5
A knife, which is used to cut a fruit was immediately dipped into water containing drops of blue litmus solution. If the colour of the solution is changed to red, what inference can be drawn about the nature of the fruit and why?
EASY
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 9 - Sample Paper-4>Sample Paper-4>Q 6
Define the term isomers. 
HARD
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 9 - Sample Paper-4>Sample Paper-4>Q 6
Draw two possible isomers of the compound with molecular formula C3H6O and write their names. 
MEDIUM
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 9 - Sample Paper-4>Sample Paper-4>Q 6
Give the electron dot structures of the propanone and propanal.
HARD
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 9 - Sample Paper-4>Sample Paper-4>Q 7
Group 15 Group 16 Group 17
D __ A
__ B C

Elements A, B, C and D belong to groups of periodic table as shown in the table above. 
(i) Is C a metal or non-metal? 
(ii) Which is more reactive, C or A? 
(iii) Which will be smaller, B or C? 
(iv) Name the family to which A belongs. 
(v) What is the valency of B. 
(vi) The formula of δ compound formed between D and C.
 

HARD
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 9 - Sample Paper-4>Sample Paper-4>Q 8
With the help of an example, explain the process of hydrogenation. Mention the essential conditions for the reaction and state the change in physical property with the formation of the product.