CHEMISTRY MOST IMPORTANT QUESTIONS FOR CLASS 12TH
BASED ON NEW SYLLABUS AND BLUEPRINT :-
TOP – 30 QUESTIONS :
1]. Explain analgesics and write any two example .
2]. write down the names of four medicinal plants and diseases cured by them ?
3].draw the diagram of caesium chloride and describe the structure brief ?
4]. write differences between positive and negative deviation ?
5]. what is the differences between physical and chemical adsorption ?
6]. give the manufacture of nitric acid by ostwald process with labelled diagram and equation involved in the reaction ?
7]. what are interhalogen compounds ? give the structures of two interhalogen compounds ?
8]. give the main differences between d and f-block elements ?
9]. what are transition elements ? in how many series are they divided ? explain .
10]. haloarenes are less reactive than haloalkanes , why ? explain .
11]. write the differences between aldehyde and ketone ?
12]. write four differences between DNA and RNA .
13]. what are carbohydrates ? give types of carbohydrates .
14]. what are preservatives ? give any two examples with name and formula ?
15]. write differences between ideal and non ideal solution ?
16]. what is standard hydrogen electrode ? how is it prepared ?
17]. define :-
peptization
coagulation
18]. write any four differences between phenols and alcohol ?
19]. write the laboratory method of preparation of acetone . give chemical equation and labelled diagram of the process ?
20]. explain the following reactions :-
carbylamine reaction
hoffman’s bromide reaction
mustard oil reaction
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