CBSE Class 12 - Chemistry- Sample Question Paper with Marking Scheme (2016)

CBSE Class 12 - Chemistry- Sample Question Paper with Marking Scheme (2016) 

CBSE Class 10 - Science - Four New Elements Added In Periodic Table

Four New Elements Added In 

Periodic Table

Time to update Chemistry Textbooks. On December 30, IUPAC completes the verification of discoveries of four new chemical elements. It completes the 7 periodic row.

The atomic numbers of these four new elements are 113, 115, 117 and 118. Soon the new names will be given to these elements. At present these elements have temporary names i.e.

Ununtrium 113, 
Ununpentium 115, 
Ununseptium 117, 
Ununoctium 118 

CBSE Class 12 - Chemistry- Sample Question Paper (2015)

CBSE Class 12 - Chemistry- Sample Question Paper (2015) 

CBSE Class 12 - Chemistry - Question Paper (2014)

	CHEMISTRY (Theory) 2014
[Time allowed: 3hrs]		[Maximum Marks:70]

General Instructions :
(i)   All questions are compulsory.
(ii)  Questions numbers 1 to 8 are very short-answer questions and carry 1 mark each.
(iii) Questions numbers 9 to 18 are also short-answer questions and carry 2 marks each.
(iv)  Questions numbers 19 to 27 are long-answer questions and carry 3 marks each.
(v)   Questions numbers 28 to 30 are long-answer questions and carry 5 marks each.
(vi)  Use Log Tables,if neccessary.Use of calculators is not allowed.

1.	Give one example of sol and gel?	1
2.	Which reducing agent is employed to get copper from the leached low grade copper ore?	1
3.	Write the IUPAC name of the compound	1
	CH3 - CH - CH2 - CHO                            NH2
4.	Which of the following isomers is more volatile :	1
	o-nitrophenol or p-nitrophenol ?
5.	Some liquids on mixing form 'azeotropes'. What are 'azeotropes' ?	1
6.	Arrange the following in increasing order of basic strength :	1
	C6H5NH2, C6H5NHCH3, C6H5CH2NH2