Class X mOCK

1. MOCK TEST-CHEMISTRY (X)
A) ANSWER ALL QUESTIONS
1) Duralumin is an alloy of
 Al and Cu
 Cu and Sn
 Al and Ag
 Al and Fe
2) Hydrogen chloride can be obtained by adding concentrated Sulphuric acid to:
 NaCl
 Na2SO4
 Na2CO3
 NaNO3
3) Which of the following reactions gives copper as a product
 Passing dry ammonia over heated copper oxide.
 Adding dilute hydrochloric acid to copper oxide.
 Heating copper oxide.
 Passing oxygen over heated copper oxide?
4) Formation of 1, 2 DI bromo Ethane from ethene and Bromine is an example of:
 Addition
 Dehydration
 Substitution
 Elimination
5) IUPAC name and trivial name of CH3CO CH3 is respectively
 Ethane and Marsh gas
 Methoxy methane and acetone
 Methane and formalin
 2,propanone and acetone
B) (a) Draw different isomers having the following molecular formula: (i) C5H12 (chain)
(ii) C4H8 (position). [5]
(b) What is MARSH gas? [1]
(c) How will you identify unsaturation in an organic compound? Give reactions. [2]
(d) Write equations for:
(i) Preparation of chloroform from methane.

2. (ii) Preparation of ethyne in laboratory. [2]
C) (i) Name the chief ore of aluminium.(1)
(ii) Name the process used to concentrate the above mentioned ore.(1)
(iii) Why is alumina added to cryolite in the electrolytic reduction of aluminium? (1)
(iv)Give cathode and anode reactions involved in extraction of aluminium from its above mentioned
ore. (1)
(v) Name one neutral oxide. (1)
D) i) Identify the substances: The catalyst used to oxidise ammonia. The drying agent in HCl. (2)
ii) Why P2O5 is not used in drying in ammonia, give equation. (2)
iii) Complete the following equations: (3)
(a) S + conc. HNO3 →
(b) Cane sugar + conc. H2SO4 →
(c) Cu + dil. HNO3 →
iv) Why sodium chloride is heated with concentrated sulphuric acid below 200oC? (2)
(v) What is Nessler’s reagent? (1)
(vi)Sulphuric acid is a dibasic acid-explain. (2)
(vii) Ostwald process is used for the manufacturing of_____________. (1)
(viii) Nitric acid is generally obtained as brownish colour liquid, how will you remove the brown
colour? (2)
E) Give IUPAC names of the following: (3)
F) What is muriatic acid? Write down the name and formula of main ore of Iron. (2)